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  • 1.
    Abdelgadir, Mohanad
    et al.
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap. Södertörns högskola, Centrum för Östersjö- och Östeuropaforskning (CBEES), Baltic & East European Graduate School (BEEGS).
    Alharbi, Randa
    University of Tabuk, Saudi Arabia.
    AlRashidi, Monif
    University of Ha'il, Saudi Arabia.
    Alatawi, Abdulaziz S.
    University of Tabuk, Saudi Arabia.
    Sjöling, Sara
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Dinnétz, Patrik
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Distribution of denitrifiers predicted by correlative niche modeling of changing environmental conditions and future climatic scenarios across the Baltic Sea2023Inngår i: Ecological Informatics, ISSN 1574-9541, E-ISSN 1878-0512, Vol. 78, artikkel-id 102346Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Denitrifying microbial communities provide an important ecosystem function in aquatic systems. Yet, knowledge on predictive and modeling of these complex and changing communities is limited. The emergently challenging question of how the geographical distribution of denitrifiers responds to ongoing and future environmental change is not yet fully understood. In our study we use metadata-based correlative niche modeling to analyze the geographical distribution of selected putative denitrifiers in the genus Sphingomonas, Mycoplana, Shewanella, and Alteromonas at different predicted environmental conditions and future climatic scenarios across the Baltic Sea. Using the predictive power of an ensemble modeling approach and eight different machine-learning algorithms, habitat suitability and the distribution of the selected denitrifiers were evaluated using geophysical and bioclimatic variables, benthic conditions, and four Representative Concentration Pathway (RCP) trajectories of future global warming scenarios. All algorithms provided successful prediction capabilities both for variable importance, and for habitat suitability with Area Under the Curve (AUC) values between 0.89 and 1.00. Model findings revealed that salinity and nitrate concentrations significantly explained the variation in distribution of the selected denitrifiers. Rising temperatures of 0.8 to 1.8 °C at future RCP60–2050 trajectories are predicted to diminish or eliminate the bioclimatic suitable habitats for denitrifier distributions across the Baltic Sea. Multi-collated terrestrial and marine environmental variables contributed to the successful prediction of denitrifier distributions within the study area. The correlative niche modeling approach with high AUC values presented in the study allowed for accurate projections of the future distributions of the selected denitrifiers. The modeling approach can be used to improve our understanding of how ongoing and predicted future environmental changes may affect habitat suitability for organisms with denitrification capacity across the Baltic Sea.

  • 2.
    Ahlbäck, Marcus
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Förnybara energikällor i media2018Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    To combat the rising global temperature Sweden have signed the Paris Agreement to limit the release of CO2 and keep the temperature to a minimum increase of 1,5 degrees. A transformation of today’s energy system towards renewable energy is paramount to this endeavour, which in part relies on public acceptance where media plays an important role inshaping public acceptance. This study aims to map acceptance of renewable energy sources and draws on framing theory, which states that the media focuses attention on certain events and gives information meaning, in a sense how something is presented to the audience influences their choices in how to process said information. As this is a qualitative study, 49 articles about bio-, geothermal, solar, water and wind energy from Sweden’s four major newspapers, Aftonbladet, Dagens Nyheter, Expressen and Svenska Dagbladet, have been gathered from the Svenska dagstidningar database and examined through frame analysis. Media framing contributing to public acceptance was bio- and solar energy while water subtracted from it. Wind energy were both contributing and subtracting from acceptance while geothermal lacked articles entirely, prohibiting it from entering public discourse altogether. Meanwhile the biggest deciding factor towards framing acceptance for renewable energy depended largely on the newspaper.

    Fulltekst (pdf)
    fulltext
  • 3.
    Albert, Séréna
    et al.
    Stockholm University, Sweden.
    Hedberg, Per
    Stockholm University, Sweden .
    Motwani, Nisha H.
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Sjöling, Sara
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Winder, Monika
    Stockholm University, Sweden.
    Nascimento, Francisco J A
    Stockholm University, Sweden.
    Phytoplankton settling quality has a subtle but significant effect on sediment microeukaryotic and bacterial communities2021Inngår i: Scientific Reports, E-ISSN 2045-2322, Vol. 11, nr 1, artikkel-id 24033Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In coastal aphotic sediments, organic matter (OM) input from phytoplankton is the primary food resource for benthic organisms. Current observations from temperate ecosystems like the Baltic Sea report a decline in spring bloom diatoms, while summer cyanobacteria blooms are becoming more frequent and intense. These climate-driven changes in phytoplankton communities may in turn have important consequences for benthic biodiversity and ecosystem functions, but such questions are not yet sufficiently explored experimentally. Here, in a 4-week experiment, we investigated the response of microeukaryotic and bacterial communities to different types of OM inputs comprising five ratios of two common phytoplankton species in the Baltic Sea, the diatom Skeletonema marinoi and filamentous cyanobacterium Nodularia spumigena. Metabarcoding analyses on 16S and 18S ribosomal RNA (rRNA) at the experiment termination revealed subtle but significant changes in diversity and community composition of microeukaryotes in response to settling OM quality. Sediment bacteria were less affected, although we observed a clear effect on denitrification gene expression (nirS and nosZ), which was positively correlated with increasing proportions of cyanobacteria. Altogether, these results suggest that future changes in OM input to the seafloor may have important effects on both the composition and function of microbenthic communities.

    Fulltekst (pdf)
    fulltext
  • 4.
    Aliyu, Habibu
    et al.
    Centre for Microbial Ecology and Genomics, University of Pretoria, Pretoria, South Africa.
    De Maayer, Pieter
    School of Molecular and Cell Biology, University of the Witwatersrand, Johannesburg, South Africa.
    Sjöling, Sara
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Cowan, Donald A.
    Centre for Microbial Ecology and Genomics, University of Pretoria, Pretoria, South Africa.
    Metagenomic Analysis of Low-Temperature Environments2017Inngår i: Psychrophiles: From Biodiversity to Biotechnology / [ed] Rosa Margesin, Cham: Springer, 2017, s. 389-421Kapittel i bok, del av antologi (Fagfellevurdert)
    Abstract [en]

    The Earth’s permanently cold biosphere is known to harbour abundant microbial biomass and represents a rich resource for the discovery of novel cold-adapted microorganisms, many of which form part of the ‘microbial dark matter’ which cannot be analysed using traditional culture-dependent approaches. The recent development of metagenomics and related multi-omics strategies has provided a means by which entire microbial communities can be studied directly, without the prerequisite of culturing. The advancement of the ‘omic’ methods is directly linked to recent progress in high-throughput sequencing, robust data processing capabilities and the application of cutting-edge analytical tools for high-throughput detection of biomolecules. The combined application of these tools and strategies has provided an unprecedented access to the structure and potential function of microbial communities in cold environments, providing increasingly comprehensive insights into the taxonomic richness and functional capacity of the indigenous microorganisms. Applications of ‘omic’ strategies have enhanced our understanding of psychrophilic adaptation mechanisms, revealing the versatility and adaptability of life in the ‘cryosphere’. In addition to the predicted roles of psychrophiles in biogeochemical cycling, recent multi-omic studies have further emphasised the importance of the ‘cryosphere’ in influencing global atmospheric conditions. Finally, metagenomic bioprospecting of cold environments has yielded a variety of novel bioactive molecules including novel ‘psychrozymes’, with a wide range of potential industrial and biotechnological applications. Here, we have provided an overview of recent developments in metagenomic technologies and their application in the study of the cold biosphere.

  • 5.
    AlRashidi, Monif
    et al.
    University of Ha’il, Saudi Arabia.
    Abdelgadir, Mohanad
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Shobrak, Mohammed
    Taif University, Saudi Arabia.
    Habitat selection by the Spiny-tailed lizard (Uromastyx aegyptia): A view from spatial analysis2021Inngår i: Saudi Journal of Biological Sciences, ISSN 1319-562X, Vol. 28, nr 9, s. 5034-5041Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Many factors affect the habitat selection for animal species, which in turn may greatly affect their distribution in different ecosystems. Understanding the processes that affect habitat selection is also critical for guiding and managing conservation initiatives. Our study aimed to assess the habitat selection by free-ranging Spiny-tailed lizard (Uromastyx aegyptia) by analyzing a geospatial data connecting its burrow parameters to different habitat characteristics within selected sites in Hail region, Saudi Arabia. We examined evidence and patterns of significant spatial clustering for (366) active burrows by linking their parameters (burrow entrance size, burrow entrance width and burrow entrance height), their reference geographical locations and, two habitat characteristics defined by soil type and vegetation cover. The objective of the analysis was to increase the understanding on the burrows aggregation process in the space and, to describe its possible relation to other spatial habitat configurations. Analysis of distances based on the Nearest Neighbor Index (NNI) and hotspots detection in Nearest neighbor hierarchical clustering (Nnh) suggested twelve (12) spatial clusters located within the study area. In addition, a spatial ordinary least square (OLS) and Poisson regression models revealed significant effects of soil type and vegetation cover on burrow parameters (OLS, p < 0.05; Poisson, p < 0.001), which indicate a strong association between burrows parameters and habitats characteristics. Findings from the study also suggest that other factors such as elevations, highways, and human settlement concentration spots could possibly play a major role in defining burrow spatial aggregation and furthermore have a significant impact on habitat selection.

    Fulltekst (pdf)
    fulltext
  • 6.
    Alzhanova-Ericsson, Alla T.
    et al.
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Matematikens didaktik.
    Bergman, Christina
    Södertörns högskola, Institutionen för kultur och lärande, Svenska.
    Dinnétz, Patrik
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Lecture attendance is a pivotal factor for improving prospective teachers’ academic performance in Teaching and Learning Mathematics2017Inngår i: Journal of Further and Higher Education, ISSN 0309-877X, E-ISSN 0013-1326, Vol. 41, nr 1, s. 1-15Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The value and importance of lectures in higher education is part of a modern education discourse worldwide. This study aims to estimate the importance of lectures for prospective teachers of kindergarten, preschool and early primary school. We analysed academic achievements of prospective teachers who had either mandatorily or voluntarily attended lectures in the subject of teaching and learning mathematics. Students’ examination grades in a maths course with mandatory or voluntary lecture attendance were analysed with a logistic model testing the association between lecture attendance requirement and grades. We show that mandatory lecture attendance (1) more than double the odds of students receiving a pass grade when their situated and tacit knowledge was examined and (2) quadrupled the odds of students achieving the highest grade (pass with distinction) when both their understanding of elementary mathematics and their situated and tacit knowledge of teaching and learning mathematics were examined. Our study provides evidence for a significant positive role of lecture attendance for students acquiring skills in Teaching and Learning Mathematics. While attending lectures students receive situated tacit knowledge of the subject which is otherwise difficult, if not impossible, for them to obtain in a different way. The observed improvement may have an additional positive effect in being a step towards overcoming a maths anxiety, which is otherwise relatively common among prospective teachers.

  • 7.
    Alzhanova-Ericsson, Alla T
    et al.
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Matematikens didaktik.
    Boberg, Karin
    Södertörns högskola, Lärarutbildningen, Lärarutbildning och Estetiska lärprocesser.
    Björkman, Dawid
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik.
    Landwehr Sydow, Alfred
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik.
    Kelmendi, Behram
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik.
    Esso, Sleyman
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik.
    Ahnoff, Örjan
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik.
    Sundbäck, Sandra
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik.
    Dinnétz, Patrik
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Multidisciplinary and Multimodal Approaches in Teaching and Learning Mathematics, Music and Language Based on the Flipped Classroom Model2020Inngår i: The 5th International Scientific and Practical Conference Languages and Contemporary Problems of Education [Язык и актуальные проблемы образования]: The International Academy of Pedagogical Educational Sciences and Moscow State Regional University, MGOU, Moscow, Russia. January 21-22, 2020 : Section 2. Language and culture of speech: traditions and perspectives. Language training and speech culture of the teacher / [ed] Artamonova, E.I.; Ushakova, O. S., Moscow, Russia: The International Academy of Pedagogical Educational Sciences and Moscow State Regional University , 2020, s. 182-192Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Digitalization and multidisciplinary approach are the new trends in Teaching and Learning theory and practice. The article lays emphasis on mathematics teaching and learning knowledge, based on Action Research Theory, New Learning Theory and Variation Theory. Preservice early elementary school teachers created audiovisual video films (AV) and Podcasts (PD) lessons integrating Mathematics, Music and Language during a university course in teacher education. These multidisciplinary lessons were used as intelligent tutors in a flipped classroom model. The lessons are dealing with proportionality, one of the most difficult items in elementary school mathematical curriculum. For explaining proportionality, the preservice teachers have used multiple representations such as manipulatives, fiction stories, videogame Minecraft, “Smash up” in tennis table, musical intervals, self-composed, self-written and self-performed songs about mathematical rules in easy to remember rap-style. Preservice teachers have shown their AV or PD lessons to elementary school students followed by joint discussions and exercisers in solving of mathematical problems. Preservice teachers analyzed their work in an essay-form report describing creation of their intelligent tutors for elementary school students’ knowledge development in mathematics, music and language, including pronunciation, explanation and understanding of mathematical terminology. The multipart flipped classroom approach promoted prospective teachers’ professional growth. For future analysis the described multipart flipped classroom model can be further developed in international collaboration.

    Fulltekst (pdf)
    fulltext
  • 8.
    Andersson, Ingela
    et al.
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap. Stockholm University, Department of Physical Geography and Quarternary Geology.
    Jarsjö, Jerker
    Stockholm University, Department of Physical Geography and Quarternary Geology.
    Petersson, Mona
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Geografi. Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Saving the Baltic Sea, the Inland Waters of Its Drainage Basin, or Both? Spatial Perspectives on Reducing P-Loads in Eastern Sweden2014Inngår i: Ambio, ISSN 0044-7447, E-ISSN 1654-7209, Vol. 43, nr 7, s. 914-925Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Nutrient loads from inland sources to the Baltic Sea and adjacent inland waters need to be reduced in order to prevent eutrophication and meet requirements of the European Water Framework Directive (WFD) and the Baltic Sea Action Plan (BSAP). We here investigate the spatial implications of using different possible criteria for reducing water-borne phosphorous (P) loads in the Northern Baltic Sea River Basin District (NBS-RBD) in Sweden. Results show that most catchments that have a high degree of internal eutrophication do not express high export of P from their outlets. Furthermore, due to lake retention, lake catchments with high P-loads per agricultural area (which is potentially of concern for the WFD) did not considerably contribute to the P-loading of the Baltic Sea. Spatially uniform water quality goals may, therefore, not be effective in NBS-RBD, emphasizing more generally the need for regional adaptation of WFD and BSAP-related goals.

  • 9.
    Andersson, Pernilla
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap. Södertörns högskola, Lärarutbildningen.
    Business as un-usual through dislocatory moments – change for sustainability and scope for subjectivity in classroom practice2018Inngår i: Environmental Education Research, ISSN 1350-4622, E-ISSN 1469-5871, Vol. 24, nr 5, s. 648-662Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This paper makes a contribution to the debate that has been described as a tension between instrumental and emancipatory educational objectives in environment and sustainability education. The contribution involves a methodological approach (introd-) using the concept ‘dislocatory moments’, to identify and analyse moments in classroom practice that address educational objectives relating to ‘change for sustainability’ and ‘thinking and acting independently’. A case of business education, when ‘sustainable development’ is integrated in a series of lessons, is used to exemplify the approach involving analysis of the emergence and closure of a dislocatory moment and the change of logics that occur. The illustrative case shows how room for subjectivity and change can be intertwined in educational practice. It is suggested that the methodological approach could be used in empirical research of classroom practice to further knowledge about the kind of situations that contribute to ‘business as un-usual’ without compromising emancipatory education ideals.

  • 10.
    Andersson, Pernilla
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap. Södertörns högskola, Lärarutbildningen.
    The Responsible Business Person: Studies of business education for sustainability2016Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Calls for the inclusion of sustainable development in the business curriculum have increased significantly in the wake of the financial crisis and increased concerns around climate change. This has led to the appearance of new initiatives and the development of new teaching approaches. This thesis explores business education at the upper secondary school level in Sweden following the inclusion of the concept of sustainable development in the curriculum. Drawing on poststructuralist discourse theory, the overarching purpose is to identify the roles of a responsible business person that are articulated in business education and to discuss how these roles could enable students to address sustainability issues. The thesis consists of four studies, based on textbook analyses, teacher interviews and classroom observations. Three categories of roles have been identified, implying that a business person is expected to either adapt to, add or create ethical values. These three categories are compared with the roles indicated in the environmental discourses constructed by Dryzek and the responsibility regimes developed by Pellizzoni. Drawing on Dryzek’s and Pellizzoni’s reasoning about which qualities are important for addressing sustainability issues, it is concluded that the roles identified in the studies could mean that students are unequipped (the adapting role), ill-equipped (the adding role) or better equipped (the creating role) to address uncertain and complex sustainability issues. The articles include empirical examples that illustrate how and in which situations specific roles are articulated, privileged or taken up. The examples also indicate how the scope for business students’ subjectivities are facilitated or hampered. It is suggested that the illustrative empirical examples could be used for critical reflection in order to enhance students’capabilities of addressing uncertain and complex sustainability issues and to improve educational quality in terms of scope for subjectivity.

    Fulltekst (pdf)
    The Responsible Business Person: Studies of business education for sustainability
    Download (jpg)
    presentationsbild
  • 11.
    Andersson, Pernilla
    et al.
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap. Södertörns högskola, Lärarutbildningen.
    Öhman, Johan
    Örebro Universitet.
    Logics of business education for sustainability2016Inngår i: Environmental Education Research, ISSN 1350-4622, E-ISSN 1469-5871, Vol. 22, nr 4, s. 463-479Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This paper explores various kinds of logics of ‘business education for sustainability’and how these ‘logics’ position the subject business person, based on eight teachers’ reasoning of their own practices. The concept of logics developed within a discourse theoretical framework is employed to analyse the teachers’ reasoning. The analysis takes its starting point in different approaches to how a business ought to or could take responsibility for sustainable development. Different approaches to business ethical responsibilities, in combination with assumptions about how educational content is legitimised and presupposed purposes of education, are used to construct logics of business education for sustainability. In the paper, the results of this analysis are presented as: the logic of profit-, social- or radical-oriented business education. Our results also show how the different logics position the subject business person differently, as one who adapts to, adds or creates ethical values. The results are first discussed in terms of how environmental and social challenges could be dealt with in the future and secondly, considering the risk of de-subjectification with regard to profit-oriented business education, the implications this may have for the educational quality itself.

  • 12.
    Andersson, Sara
    et al.
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Sundström, Lovisa
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Gröna tak och hållbar urban utveckling: en fallstudie av stadsutvecklingsprojektet Norra Djurgårdsstaden i Stockholm2020Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Mänskligheten står inför en framtid med klimatförändringar och utmaningar i form av återkommande värmeböljor, ökad nederbörd, urbanisering samt minskad biologisk mångfald. Det blir allt mer attraktivt att bosätta sig i städer och i kombination med befolkningsökningen sker det en snabb global urbanisering. Detta leder till hög exploateringshastighet i våra städer då andelen hårdgjorda ytor ökar och andelen gröna ytor minskar. Vid byggandet av fastigheter tillkommer en stor mängd outnyttjade ytor, ofta i form av mörka tak. Dessa är inte bara outnyttjade ytor på dyr tomtmark utan skapar ytterligare problem kopplade till urbanisering i form av bland annat minskat albedo. Närhet till grönska gör att människor mår både fysiskt och psykiskt bättre vilket avspeglar sig i en högre betalningsvilja för bostäder i närhet till grönska. Privatpersoner samt fastighetsägare vill gärna profilera sig som hållbara då hållbarhet på senare tid kommit att bli en identitetsskapande “statusmarkör”. Hållbara bostäder kan därmed vara en säljande faktor. Grönska på taken är i sig inget nytt påfund men har senaste åren fått en renässans i Sverige då det visat sig kunna ge fördelar såsom tillgång till grönska för de boende, dagvattenhantering, minskad värmeöeffekt och bättre luftkvalitet. Syftet med studien har varit att undersöka hur ett av Europas mest omfattande stadsutvecklingsprojekt, Norra Djurgårdsstaden i Stockholm, arbetar med hållbar urban utveckling genom gröna tak. De gröna taken kan generera en mängd ekonomiska, ekologiska och sociala fördelar i städer. I studien används urban hållbarhetsteori samt ett egenkonstruerat analysramverk baserat på avsnittet tidigare forskning och teori. Genom en kvalitativ innehållsanalys samt semistrukturerade intervjuer har det framkommit i denna studie att den sociala dimensionen av hållbar stadsutveckling utifrån gröna tak i Norra Djurgårdsstaden överskuggas av de två andra aspekterna; ekonomiskt och ekologiskt. Detta trots att hållbarhetsarbetet med Norra Djurgårdsstaden tagit med alla tre aspekter inom hållbar utveckling; ekonomiskt, ekologiskt och socialt i beaktande när det kommer till planering av stadsdelen.

    Fulltekst (pdf)
    Gröna tak och hållbar urban utveckling
  • 13.
    Andersson Skog, Nils
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Bats in Urban Sweden: A multiple regression analysis of bats’ relationship to urbanization2021Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Human development continues to use up more physical space in the natural world, threatening the natural habitats of many organisms. To combat the loss of biodiversity science needs to explore what landscape features are important for different organisms so that we can incorporate these into the modern environment. As bats play an important role in many ecosystems and can reflect changes through trophic levels, analyzing their preferred habitats can help planners improve biological diversity of the urban habitat. Using acoustically identified bat sightings from Artportalen.se for the years 2017-2018, this paper studied the habitats of bats in Sweden. Through multiple regression analysis we examine the response in abundance and/or diversity of bats to physical and socio-cultural attributes of the urban habitat. We examined a total of 10160 bats from 18 species in 418 land cover locales and 306 demographical statistical areas with varying degrees of urbanization. Our results indicate that bat abundance and diversity decrease significantly with higher urbanization while deciduous forests are the most important land cover type for all bats. The results also indicate that wealthier areas have less abundance and diversity even when factoring in population density. Species specific analysis suggested that bat species who are better adapted at foraging in open vegetated landscapes and over water were less susceptible to the negative impacts of the urban habitat. We conclude that diverse habitats with a mixture of open vegetated areas, watercourses and broadleaf forests are the most important land features for a diverse bat fauna along with high connectivity via tree cover and linear landscape elements. If urban planning could incorporate these features into the urban habitat, some of the negative impacts of urbanization could be prevented. 

    Fulltekst (pdf)
    fulltext
  • 14.
    Andrén, Elinor
    et al.
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Andrén, Thomas
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Syrefria bottnar - orsakade av klimat, människa eller både och?2014Inngår i: Havsutsikt, ISSN 1104-0513, nr 2, s. 12-14Artikkel i tidsskrift (Annet (populærvitenskap, debatt, mm))
  • 15.
    Andrén, Elinor
    et al.
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Klimaschewski, Andrea
    Queen's University Belfast, UK.
    Self, Angela E.
    The Natural History Museum, London, UK.
    St. Amour, Natalie
    University of Western Ontario, London, Ontario, Canada.
    Andreev, Andrei A.
    University of Cologne, Cologne, Germany.
    Bennett, Keith D.
    Kazan Federal University, Kazan, Russia / Uppsala University.
    Conley, Daniel J.
    Lund University, Lund, Sweden.
    Edwards, Thomas W.D.
    University of Waterloo, Ontario, Canada.
    Solovieva, Nadia
    Kazan Federal University, Kazan, Russia / University College London, UK.
    Hammarlund, Dan
    Lund University, Lund, Sweden.
    Holocene climate and environmental change in north-eastern Kamchatka (Russian Far East), inferred from a multi-proxy study of lake sediments2015Inngår i: Global and Planetary Change, ISSN 0921-8181, E-ISSN 1872-6364, Vol. 134, s. 41-54Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A sediment record from a small lake in the north-eastern part of the Kamchatka Peninsula has been investigated in a multi-proxy study to gain knowledge of Holocene climatic and environmental change. Pollen, diatoms, chironomids and selected geochemical parameters were analysed and the sediment record was dated with radiocarbon. The study shows Holocene changes in the terrestrial vegetation as well as responses of the lake ecosystem to catchment maturity and multiple stressors, such as climate change and volcanic eruptions. Climate change is the major driving force resulting in the recorded environmental changes in the lake, although recurrent tephra deposition events also contributed. The sediment record has an age at the base of about 10,000 cal yrs BP, and during the first 400 years the climate was cold and the lake exhibited extensive ice-cover during winter and relatively low primary production. Soils in the catchment were poor with shrub alder and birches dominatingthe vegetation surrounding the lake. At about 9600–8900 cal yrs BP the climate was cold and moist, and strong seasonal wind stress resulted in reduced ice-cover and increased primary production. After ca. 8900 cal yrs BP the forest density increased around the lake, runoff decreased in a generally drier climate resulting in decreasedprimary production in the lake until ca. 7000 cal yrs BP. This generally dry climate was interrupted by a brief climatic perturbation, possibly attributed to the 8.2 ka event, indicating increasingly windy conditions with thick snow cover, reduced ice-cover and slightly elevated primary production in the lake. The diatom record shows maximum thermal stratification at ca. 6300–5800 cal yrs BP and indicates together with the geochemical proxies a dry and slightly warmer climate resulting in a high productive lake. The most remarkably change in the catchment vegetation occurred at ca. 4200 cal yrs BP in the form of a conspicuous increase in Siberian dwarf pine (Pinus pumila), indicating a shift to a cooler climate with a thicker and more long-lasting snow cover. Thisvegetational change was accompanied by marked shifts in the diatom and chironomid stratigraphies, which are also indicative of colder climate and more extensive ice-cover.

    Fulltekst (pdf)
    fulltext
  • 16.
    Andrén, Elinor
    et al.
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Telford, Richard J.
    University of Bergen.
    Jonsson, Per
    Stockholm University.
    Reconstructing the history of eutrophication and quantifying total nitrogen reference conditions in Bothnian Sea coastal waters2017Inngår i: Estuarine, Coastal and Shelf Science, ISSN 0272-7714, E-ISSN 1096-0015, Vol. 198, s. 320-328Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Reference total nitrogen (TN) concentrations for the Gårdsfjärden estuary in the central Bothnian Sea, which receives discharge from an industrial point-source, have been estimated from diatom assemblages using a transfer function. Sedimentological and diatom evidence imply a good ecological status before 1920 with an assemblage dominated by benthic taxa indicating excellent water transparency, high diatom species richness and less organic sedimentation resulting in homogeneous well oxygenated sediments. A change in the diatom assemblage starts between 1920 and 1935 when the species richness declines and the proportion of planktic taxa increases. Increased organic carbon sedimentation after 1920 led to hypoxic bottom waters, and the preservation of laminae in the sediments. The trend in the reconstructed TN-values agrees with the history of the discharge from the mill, reaching maximum impact during the high discharge between 1945 and 1990. The background condition for TN in Gårdsfjärden is 260-300 μg L-1, reconstructed until 1920.

    Fulltekst (pdf)
    fulltext
  • 17.
    Andrén, Elinor
    et al.
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    van Wirdum, Falkje
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Norbäck Ivarsson, Lena
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Lönn, Mikael
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Moros, Matthias
    Leibniz Institute for Baltic Sea Research Warnemünde, Rostock, Germany.
    Andrén, Thomas
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Medieval versus recent environmental conditions in the Baltic Proper, what was different a thousand years ago?2020Inngår i: Palaeogeography, Palaeoclimatology, Palaeoecology, ISSN 0031-0182, E-ISSN 1872-616X, Vol. 555, artikkel-id 109878Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A sediment record from the western Gotland Basin, northwestern Baltic Proper, covering the last 1200 years, was investigated for past changes in climate and the environment using diatoms as a proxy. The aim is to compare the environmental conditions reconstructed during Medieval times with settings occurring the last century under influence of environmental stressors like eutrophication and climate change. The study core records more marine conditions in the western Gotland Basin surface waters during the Medieval Climate Anomaly (MCA; 950–1250C.E.), with a salinity of at least 8 psu compared to the present 6.5 psu. The higher salinity together with a strong summer-autumn stratification caused by warmer climate resulted in extensive long-lasting diatom blooms of Pseudosolenia calcar-avis, effectively enhancing the vertical export of organic carbon to the sediment and contributing to benthic hypoxia. Accordingly, our data support that a warm and dry climate induced the extensive hypoxic areas in the open Baltic Sea during the MCA. During the Little ice Age (LIA; 1400–1700C.E.), the study core records oxic bottom water conditions, decreasing salinity and less primary production. This was succeeded during the 20th century, about 1940, by environmental changes caused by human-induced eutrophication. Impact of climate change is visible in the diatom composition data starting about 1975C.E. and becoming more pronounced 2000C.E., visible as an increase of taxa that thrived in stratified waters during autumn blooms typically due to climate warming.

    Fulltekst (pdf)
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  • 18.
    Andrén, Thomas
    et al.
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Andrén, Elinor
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Zhang, Rui
    Xiamen University, China.
    Baltic Sea Basin Paleoenvironment: paleoenvironmental evolution of the Baltic Sea Basin through the last glacial cycle2014Rapport (Annet vitenskapelig)
  • 19.
    Andrén, Thomas
    et al.
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Jørgensen, Bo Barker
    Cotterill, Carol
    Green, Sophie
    IODP expedition 347: Baltic Sea basin paleoenvironment and biosphere2015Inngår i: Scientific Drilling, ISSN 1816-8957, E-ISSN 1816-3459, Vol. 20, s. 1-12Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The Integrated Ocean Drilling Program (IODP) expedition 347 cored sediments from different settings of the Baltic Sea covering the last glacial–interglacial cycle. The main aim was to study the geological development of the Baltic Sea in relation to the extreme climate variability of the region with changing ice cover and major shifts in temperature, salinity, and biological communities. Using the Greatship Manisha as a European Consortium for Ocean Research Drilling (ECORD) mission-specific platform, we recovered 1.6 km of core from nine sites of which four were additionally cored for microbiology. The sites covered the gateway to the North Sea and Atlantic Ocean, several sub-basins in the southern Baltic Sea, a deep basin in the central Baltic Sea, and a river estuary in the north.

    The waxing and waning of the Scandinavian ice sheet has profoundly affected the Baltic Sea sediments. During theWeichselian, progressing glaciers reshaped the submarine landscape and displaced sedimentary deposits from earlier Quaternary time. As the glaciers retreated they left a complex pattern of till, sand, and lacustrine clay, which in the basins has since been covered by a thick deposit of Holocene, organic-rich clay. Due to the stratified water column of the brackish Baltic Sea and the recurrent and widespread anoxia, the deeper basins harbor laminated sediments that provide a unique opportunity for high-resolution chronological studies.

    The Baltic Sea is a eutrophic intra-continental sea that is strongly impacted by terrestrial runoff and nutrient fluxes. The Holocene deposits are recorded today to be up to 50m deep and geochemically affected by diagenetic alterations driven by organic matter degradation. Many of the cored sequences were highly supersaturated with respect to methane, which caused strong degassing upon core recovery. The depth distributions of conservative sea water ions still reflected the transition at the end of the last glaciation from fresh-water clays to Holocene brackish mud. High-resolution sampling and analyses of interstitial water chemistry revealed the intensive mineralization and zonation of the predominant biogeochemical processes. Quantification of microbial cells in the sediments yielded some of the highest cell densities yet recorded by scientific drilling.

    Fulltekst (pdf)
    fulltext
  • 20.
    Andrén, Thomas
    et al.
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Jørgensen, Bo Barker
    Cotterill, Carol
    Green, Sophie
    Andrén, Elinor
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Baltic Sea Basin Paleoenvironment: Expedition 347 of the mission-specific drilling platform  from and to Kiel, Germany Sites M0059–M0067  12 September–1 November 20132015Rapport (Annet vitenskapelig)
  • 21.
    Asghar, Naveed
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Ticks and Tick-borne Encephalitis Virus: From Nature to Infection2016Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Vector-borne diseases are an increasing global threat to humans due to climate changes, elevating the risk of infections transmitted by mosquitos, ticks, and other arthropod vectors. Ixodes ricinus, a common tick in Europe, transmits dangerous tick-borne pathogens to humans. Tick-borne encephalitis (TBE) is a vector-borne disease caused by TBE virus (TBEV). Climate change has contributed to increased tick abundance and incidence of tick-borne diseases, and between 10,000 and 15,000 human TBE cases are reported annually in Europe and Asia. TBEV shows a patchy geographical distribution pattern where each patch represents a natural focus. In nature, TBEV is maintained within the tick-rodent enzootic cycle. Co-feeding is the main route for TBEV transmission from infected to uninfected ticks and for maintenance within the natural foci. The increasing number of TBE cases in Scandinavia highlights the importance of characterizing additional TBEV sequences and of identifying novel natural foci, and in this work we sequenced and phylogenetically characterized four TBEV strains: Saringe-2009 (from a blood-fed nymph), JP-296 (from a questing adult male), JP-554 (from a questing adult male), and Mandal-2009 (from a pool of questing nymphs, n = 10). Mandal-2009 represents a TBEV genome from a natural focus in southern Norway. Saringe-2009 is from a natural endemic focus in northern Stockholm, Sweden, and JP-296 and JP-554 originate from a natural focus “Torö” in southern Stockholm. In addition, we have studied the effect of different biotic and abiotic factors on population dynamics of I. ricinus in southern Stockholm and observed significant spatiotemporal variations in tick activity patterns. Seasonal synchrony of immature stages and total tick abundance are important factors for the probability of horizontal transmission of TBEV among co-feeding ticks. We found that the probability of co-occurrence of larvae, nymphs, and female adults was highest during early summer whereas increasing vegetation height and increasing amounts of forest and open water around the study sites had a significant negative effect on co-occurrence of larvae, nymphs, and female adults.

    The proximal part of the 3 ́non-coding region (3 ́NCR) of TBEV contains an internal poly(A) tract, and genomic analysis of Saringe-2009 revealed variability in the poly(A) tract indicating the existence of different variants within the TBEV pool of Saringe-2009. Like other RNA viruses, TBEV exists as swarms of unique variants called quasispecies. Because Saringe-2009 came from an engorged nymph that had been feeding on blood for >60 h, we propose that Saringe-2009 represents a putative shift in the TBEV pool when the virus switches from ectothermic/tick to endothermic/mammalian environments. We investigated the role of poly(A) tract variability in replication and virulence of TBEV by generating two infectious clones of the TBEV strain Toro-2003, one with a short/wild-type (A)3C(A)6 poly(A) tract and one with a long (A)3C(A)38 poly(A) tract. The infectious clone with the long poly(A) tract showed poor replication in cell culture but was more virulent in C57BL/6 mice than the wild-type clone. RNA folding predictions of the TBEV genomes suggested that insertion of a long poly(A) tract abolishes a stem loop structure at the beginning of the 3 ́NCR. Next generation sequencing (NGS) analysis of the TBEV genomes after passaging in cell culture and/or mouse brain revealed molecular determinants and quasispecies structure that might contribute to the observed differences in virulence. Our findings suggest that the long poly(A) tract imparts instability to the TBEV genome resulting in higher quasispecies diversity that in turn contributes to TBEV virulence. Phylogenetic analysis of Saringe-2009, JP-296, JP-554, and Mandal-2009 predicted a strong evolutionary relationship among the four strains. They clustered with Toro-2003, the first TBEV strain from Torö, demonstrating a Scandinavian clade. Except for the proximal part of the 3 ́NCR, TBEV is highly conserved in its genomic structure. Genomic analysis revealed that Mandal-2009 contains a truncated 3 ́NCR similar to the highly virulent strain Hypr, whereas JP-296 and JP-554 have a genomic organization identical to Toro-2003, the prototypic TBEV strain from the same natural focus. NGS revealed significantly higher quasispecies diversity for JP-296 and JP-554 compared to Mandal-2009. In addition, single nucleotide polymerphism (SNP) analysis showed that 40% of the SNPs were common between quasispecies populations of JP-296 and JP-554, indicating the persistence and maintenance of TBEV quasispecies within the natural focus.

    Taken together, these findings indicate the importance of environmental factors for the occurrence pattern of the different life-stages of the tick vector, which are important for the persistence of TBEV in nature. Our findings also show that the selection pressure exerted by specific host also affects the population structure of the TBEV quasispecies. In addition, our results further demonstrate that the evolution of quasispecies has effect on TBEV virulence in mice.

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    Ticks and Tick-borne Encephalitis Virus: From nature to infection
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  • 22.
    Asghar, Naveed
    et al.
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Biologi. Örebro universitet.
    Petersson, Mona
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Geografi.
    Johansson, Magnus
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Biologi. Örebro univarsitet.
    Dinnétz, Patrik
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Local land-scape effects on population dynamics of Ixodes ricinus2016Inngår i: Geospatial Health, ISSN 1827-1987, Vol. 11, s. 283-289, artikkel-id 487Artikkel i tidsskrift (Fagfellevurdert)
    Fulltekst (pdf)
    fulltext
  • 23.
    Asghar, Naveed
    et al.
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Biologi. Örebro universitet.
    Pettersson, John H-O
    Norwegian Institute of Public Health, Oslo, Norway / Statens veterinärmedicinska anstalt.
    Dinnétz, Patrik
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Andreassen, Åshild
    Norwegian Institute of Public Health, Oslo, Norway.
    Johansson, Magnus
    Örebro universitet.
    Deep sequencing analysis of tick-borne encephalitis virus from questing ticks at natural foci reveals similarities between quasispecies pools of the virus2017Inngår i: Journal of General Virology, ISSN 0022-1317, E-ISSN 1465-2099, Vol. 98, nr 3, s. 413-421Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Every year, tick-borne encephalitis virus (TBEV) causes severe central nervous system infection in 10 000 to 15 000 people in Europe and Asia. TBEV is maintained in the environment by an enzootic cycle that requires a tick vector and a vertebrate host, and the adaptation of TBEV to vertebrate and invertebrate environments is essential for TBEV persistence in nature. This adaptation is facilitated by the error-prone nature of the virus's RNA-dependent RNA polymerase, which generates genetically distinct virus variants called quasispecies. TBEV shows a focal geographical distribution pattern where each focus represents a TBEV hotspot. Here, we sequenced and characterized two TBEV genomes, JP-296 and JP-554, from questing Ixodes ricinus ticks at a TBEV focus in central Sweden. Phylogenetic analysis showed geographical clustering among the newly sequenced strains and three previously sequenced Scandinavian strains, Toro-2003, Saringe-2009 and Mandal-2009, which originated from the same ancestor. Among these five Scandinavian TBEV strains, only Mandal-2009 showed a large deletion within the 3' non-coding region (NCR), similar to the highly virulent TBEV strain Hypr. Deep sequencing of JP-296, JP-554 and Mandal-2009 revealed significantly high quasispecies diversity for JP-296 and JP-554, with intact 3' NCRs, compared to the low diversity in Mandal-2009, with a truncated 3' NCR. Single-nucleotide polymorphism analysis showed that 40% of the single-nucleotide polymorphisms were common between quasispecies populations of JP-296 and JP-554, indicating a putative mechanism for how TBEV persists and is maintained within its natural foci.

  • 24.
    Asplund, Maria E.
    et al.
    Department of Biological and Environmental Sciences, University of Gothenburg, Fiskebäckskil, Sweden.
    Bonaglia, Stefano
    Department of Marine Sciences, University of Gothenburg, Gothenburg, Sweden.
    Boström, Christoffer
    Faculty of Science and Engineering, Environmental and Marine Biology, Åbo Akademi University, Åbo, Finland.
    Dahl, Martin
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Deyanova, Diana
    Department of Biological and Environmental Sciences, University of Gothenburg, Fiskebäckskil, Sweden.
    Gagnon, Karine
    Faculty of Science and Engineering, Environmental and Marine Biology, Åbo Akademi University, Åbo, Finland.
    Gullström, Martin
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Holmer, Marianne
    Department of Biology, Danish Institute for Advanced Study, University of Southern Denmark, Odense, Denmark.
    Björk, Mats
    Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden.
    Methane Emissions From Nordic Seagrass Meadow Sediments2022Inngår i: Frontiers in Marine Science, E-ISSN 2296-7745, Vol. 8, artikkel-id 811533Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Shallow coastal soft bottoms are important carbon sinks. Submerged vegetation has been shown to sequester carbon, increase sedimentary organic carbon (C-org) and thus suppress greenhouse gas (GHG) emissions. The ongoing regression of seagrass cover in many areas of the world can therefore lead to accelerated emission of GHGs. In Nordic waters, seagrass meadows have a high capacity for carbon storage, with some areas being recognized as blue carbon hotspots. To what extent these carbon stocks lead to emission of methane (CH4) is not yet known. We investigated benthic CH4 emission (i.e., net release from the sediment) in relation to seagrass (i.e. Zostera marina) cover and sedimentary C-org content (%) during the warm summer period (when emissions are likely to be highest). Methane exchange was measured in situ with benthic chambers at nine sites distributed in three regions along a salinity gradient from similar to 6 in the Baltic Sea (Finland) to similar to 20 in Kattegat (Denmark) and similar to 26 in Skagerrak (Sweden). The net release of CH4 from seagrass sediments and adjacent unvegetated areas was generally low compared to other coastal habitats in the region (such as mussel banks and wetlands) and to other seagrass areas worldwide. The lowest net release was found in Finland. We found a positive relationship between CH4 net release and sedimentary C-org content in both seagrass meadows and unvegetated areas, whereas no clear relationship between seagrass cover and CH4 net release was observed. Overall, the data suggest that Nordic Zostera marina meadows release average levels of CH4 ranging from 0.3 to 3.0 mu g CH4 m(-2) h(-1), which is at least 12-78 times lower (CO2 equivalents) than their carbon accumulation rates previously estimated from seagrass meadows in the region, thereby not hampering their role as carbon sinks. Thus, the relatively weak CH4 emissions from Nordic Z. marina meadows will not outweigh their importance as carbon sinks under present environmental conditions.

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  • 25.
    Asplund, Maria E.
    et al.
    University of Gothenburg, Sweden.
    Dahl, Martin
    Stockholm University, Sweden.
    Ismail, Rashid O.
    Stockholm University, Sweden; University of Dar Salaam, Tanzania.
    Arias-Ortiz, Ariane
    Autonomous University of Barcelona, Spain; University of California Berkeley, USA.
    Deyanova, Diana
    University of Gothenburg, Sweden.
    Franco, Joao N.
    Universidade do PortoUniversidade do Porto, Portugal; Polytechnic Institute of Leiria, Portugal.
    Hammar, Linus
    Octopus Ink Research and Analysis, Sweden.
    Hoamby, Arielle, I
    de l’Université de Toliara, Madagascar; Wildlife Conservation Society, Madagascar.
    Linderholm, Hans W.
    University of Gothenburg, Sweden.
    Lyimo, Liberatus D.
    University of Dodoma, Tanzania.
    Perry, Diana
    Swedish University of Agricultural Sciences, Sweden.
    Rasmusson, Lina M.
    University of Gothenburg, Sweden.
    Ridgway, Samantha N.
    Edith Cowan University, Australia.
    Gispert, Gloria Salgado
    Edith Cowan University, Australia.
    D'Agata, Stephanie
    Wildlife Conservation Society, Madagascar; Macquarie University, Australia.
    Glass, Leah
    Blue Ventures Conservat, Madagascar.
    Mahafina, Jamal Angelot
    de l’Université de Toliara, Madagascar.
    Ramahery, Volanirina
    Nexus Madagascar Company, Madagascar.
    Masque, Pere
    Universitat Autònoma de Barcelona, Spain; Edith Cowan University, Australia; International Atomic Energy Agency, Monaco.
    Björk, Mats
    Stockholm University, Sweden.
    Gullström, Martin
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Dynamics and fate of blue carbon in a mangrove-seagrass seascape: influence of landscape configuration and land-use change2021Inngår i: Landscape Ecology, ISSN 0921-2973, E-ISSN 1572-9761, Vol. 36, s. 1489-1509Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Context Seagrass meadows act as efficient natural carbon sinks by sequestering atmospheric CO2 and through trapping of allochthonous organic material, thereby preserving organic carbon (C-org) in their sediments. Less understood is the influence of landscape configuration and transformation (land-use change) on carbon sequestration dynamics in coastal seascapes across the land-sea interface. Objectives We explored the influence of landscape configuration and degradation of adjacent mangroves on the dynamics and fate of C-org in seagrass habitats. Methods Through predictive modelling, we assessed sedimentary C-org content, stocks and source composition in multiple seascapes (km-wide buffer zones) dominated by different seagrass communities in northwest Madagascar. The study area encompassed seagrass meadows adjacent to intact and deforested mangroves. Results The sedimentary C-org content was influenced by a combination of landscape metrics and inherent habitat plant- and sediment-properties. We found a strong land-to-sea gradient, likely driven by hydrodynamic forces, generating distinct patterns in sedimentary C-org levels in seagrass seascapes. There was higher C-org content and a mangrove signal in seagrass surface sediments closer to the deforested mangrove area, possibly due to an escalated export of C-org from deforested mangrove soils. Seascapes comprising large continuous seagrass meadows had higher sedimentary C-org levels in comparison to more diverse and patchy seascapes. Conclusion Our results emphasize the benefit to consider the influence of seascape configuration and connectivity to accurately assess C-org content in coastal habitats. Understanding spatial patterns of variability and what is driving the observed patterns is useful for identifying carbon sink hotspots and develop management prioritizations.

  • 26.
    Atteridge, Aaron
    et al.
    Stockholm Environment Institute.
    Remling, Elise
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Is adaptation reducing vulnerability or redistributing it?2018Inngår i: Wiley Interdisciplinary Reviews: Climate Change, ISSN 1757-7780, E-ISSN 1757-7799, Vol. 9, nr 1, artikkel-id e500Artikkel, forskningsoversikt (Fagfellevurdert)
    Abstract [en]

    As globalization and other pressures intensify the economic, social and biophysical connections between people and places, it seems likely that adaptation responses intended to ameliorate the impacts of climate change might end up shifting risks and vulnerability between people and places. Building on earlier conceptual work in maladaptation and other literature, this article explores the extent to which concerns about vulnerability redistribution have influenced different realms of adaptation practice. The review leads us to conclude that the potential for adaptation to redistribute risk or vulnerability is being given only sparse—and typically superficial—attention by practitioners. Concerns about ‘maladaptation’, and occasionally vulnerability redistribution specifically, are mentioned on the margins but do not significantly influence the way adaptation choices are made or evaluated by policy makers, project planners or international funds. In research, the conceptual work on maladaptation is yet to translate into a significant body of empirical literature on the distributional impacts of real-world adaptation activities, which we argue calls into question our current knowledge base about adaptation. These gaps are troubling, because a process of cascading adaptation endeavors globally seems likely to eventually re-distribute risks or vulnerabilities to communities that are already marginalized and vulnerable. We conclude by discussing the implications that the potential for vulnerability redistribution might have for the governance of adaptation processes, and offer some reflections on how research might contribute to addressing gaps in knowledge and in practice.

  • 27.
    Auffret, Alistair G.
    et al.
    Swedish University of Agricultural Sciences / Stockholm University.
    Kimberley, Adam
    Stockholm University.
    Plue, Jan
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap. Stockholm University.
    Waldén, Emelie
    Stockholm University.
    Super-regional land-use change and effects on the grassland specialist flora2018Inngår i: Nature Communications, E-ISSN 2041-1723, Vol. 9, artikkel-id 3464Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Habitat loss through land-use change is the most pressing threat to biodiversity worldwide. European semi-natural grasslands have suffered an ongoing decline since the early twentieth century, but we have limited knowledge of how grassland loss has affected biodiversity across large spatial scales. We quantify land-use change over 50-70 years across a 175,000 km(2) super-region in southern Sweden, identifying a widespread loss of open cover and a homogenisation of landscape structure, although these patterns vary considerably depending on the historical composition of the landscape. Analysing species inventories from 46,796 semi-natural grasslands, our results indicate that habitat loss and degradation have resulted in a decline in grassland specialist plant species. Local factors are the best predictors of specialist richness, but the historical landscape predicts present-day richness better than the contemporary landscape. This supports the widespread existence of time-lagged biodiversity responses, indicating that further species losses could occur in the future.

  • 28.
    Augustinsson Malmberg, Elliot
    et al.
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Lagerhjelm, Charlotte
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Marina ekosystemtjänster för Hav i balans samt levande kust och skärgård: En kvalitativ analys av lokal förvaltning av Höga Kusten och Sankt Anna-Missjö2021Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Östersjön omfattas av en stor mångfald marina ekosystemtjänster som livnär närliggande samhällen. Deras funktion är hotad av en mängd terrestra och akvatiska aktiviteter som har förorenat havet, vilket kräver en långsiktig hållbar förvaltning. Syftet med denna uppsats är att bidra med kunskap om och förstå utmaningar och möjligheter i att uppnå en god ekologisk status i Östersjön. Studien baseras på en granskning av förvaltningsmetoder hos länsstyrelser och kommuner i två områden som är skyddade av den regionala överenskommelsen Helsingforskonventionen; Höga Kusten i Västernorrland och S:t Anna-Missjö i Östergötland. Till grund för det analytiska ramverket ligger Havs- och vattenmyndighetens rapport, som beskriver ekosystemtjänster som Östersjön bidrar med, samt även tjänsternas status, åtgärder och utmaningar som uppstår vid förvaltning. Resultatet baseras på kvalitativa metoder för att samla in data, genom att specifikt studera dokument samt intervjuer med lokala tjänstemän. Den insamlade empirin har blivit kategoriserad och analyserad i linje med Havs- och vattenmyndighetens rapport, därefter har innehållet diskuterats. Resultatet visar att mest fokus lades på hantering av övergödning, ohållbart fiske och reglering av föroreningar, samt deras trade-off- och synergieffekter som påverkar förvaltningen av just dessa ekosystemtjänster. Följaktligen, är det nödvändigt för tjänstemän att samverka med lokalbefolkningen för att uppnå en hållbar förvaltning av de skyddade områdena och deras ekosystemtjänster. Generella utmaningar ansågs vara tid, resurser och kunskap för förvaltning av marina miljöer. Dock genomsyrar myndighetens ramverk om ekosystemtjänster stora delar av länsstyrelserna och kommunernas arbete med marin förvaltning på Höga Kusten och S:t Anna-Missjö. Ekosystemtjänsternas status och funktioner är integrerade i länens och kommunernas förvaltningsmetoder av de skyddade områdena. Ekosystemtjänster som begrepp är däremot frånvarande och inte explicit nämnt i arbetet. 

    Fulltekst (pdf)
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  • 29.
    Bachour, Raougina-Laouisa
    et al.
    Swedish University of Agricultural Sciences.
    Golovko, Oksana
    Swedish University of Agricultural Sciences.
    Kellner, Martin
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Pohl, Johannes
    Swedish University of Agricultural Sciences.
    Behavioral effects of citalopram, tramadol, and binary mixture in zebrafish (Danio rerio) larvae2020Inngår i: Chemosphere, ISSN 0045-6535, E-ISSN 1879-1298, Vol. 238, artikkel-id 124587Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Pharmaceuticals are emerging as environmentally problematic compounds. As they are often not appropriately removed by sewage treatment plants, pharmaceutical compounds end up in surface water environments worldwide at concentrations in the ng to μg L−1 range. There is a need to further explore single compound and mixture effects using e.g. in vivo test model systems. We have investigated, for the first time, behavioral effects in larval zebrafish (Danio rerio) exposed to a binary mixture of an antidepressant drug (citalopram) and a synthetic opioid (tramadol). Citalopram and tramadol have a similar mode of action (serotonin reuptake inhibition) and are known to produce drug-drug interactional effects resulting in serotonin syndrome (SS) in humans. Zebrafish embryo-larvae were exposed to citalopram, tramadol and 1:1 binary mixture from fertilization until 144 h post fertilization. No effects on heart rate, spontaneous tail coiling, or death/malformations were observed in any treatment at tested concentrations. Behavior (hypoactivity in dark periods) was on the other hand affected, with lowest observed effect concentrations (LOECs) of 373 μg L−1 for citalopram, 320 μg L−1 for tramadol, and 473 μg L−1 for the 1:1 mixture. Behavioral EC50 was calculated to be 471 μg L−1 for citalopram, 411 μg L−1 for tramadol, and 713 μg L−1 for the 1:1 mixture. The results of this study conclude that tramadol and citalopram produce hypoactivity in 144 hpf zebrafish larvae. Further, a 1:1 binary mixture of the two caused the same response, albeit at a higher concentration, possibly due to SS.

    Fulltekst (pdf)
    fulltext
  • 30.
    Bangah, Ramesh
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    The State of Needle Exchange Programs in Sweden and Hepatitis C Virus Incidence2020Independent thesis Advanced level (degree of Master (One Year)), 10 poäng / 15 hpOppgave
    Abstract [en]

    Hepatitis C virus (HCV) affects up to 45,000 people in Sweden today. Although it is a very treatable disease, the prevalence of HCV is extremely high within the population of people who inject drugs (PWID). This study examines the direct effect of needle exchange programs (NEPs) on HCV rates in Sweden. Previous research has shown that NEPs reduce the transmission of other blood-borne diseases among PWID. Using an interrupted time series (ITS) analysis, this study investigates if there are statistically significant differences between HCV rates in Swedish counties before and after the implementation of NEPs. The study also investigates via linear regression to see if there is a relationship between sterile injecting equipment (needles and syringes) dispensed and HCV rates in the counties where NEPs exist. While there has been a steady decrease in HCV rates across the country as a whole, the ITS analyses show no statistically significant differences in HCV rates due to the opening of NEPs. Because of the relatively recent introduction of NEPs in Sweden, more data points post-intervention may be needed before we can truly see the effect they have on regional HCV rates. There is also no relationship between the number of needles and syringes dispensed and county HCV rates. However, Sweden falls far short of the 300 syringes/needles per user per year recommendation of the World Health Organization at this time. Standardized data collection and further research can help answer these questions more clearly. 

    Fulltekst (pdf)
    fulltext
  • 31.
    Banyoi, Silvia-Maria
    et al.
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik.
    Porseryd, Tove
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Larsson, Josefine
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap. Marint Centrum, Simrishamn, Sweden.
    Grahn, Mats
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Dinnétz, Patrik
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    The effects of exposure to environmentally relevant PFAS concentrations for aquatic organisms at different consumer trophic levels: Systematic review and meta-analyses2022Inngår i: Environmental Pollution, ISSN 0269-7491, E-ISSN 1873-6424, Vol. 315, artikkel-id 120422Artikkel, forskningsoversikt (Fagfellevurdert)
    Abstract [en]

    Per-and polyfluoroalkyl substances (PFAS) is a collective name for approximately 4700 synthetic chemicals ubiquitous in the aquatic environment worldwide. They are used in a wide array of products and are found in living organisms around the world. Some PFAS have been associated with cancer, developmental toxicity, endocrine disruption, and other health effects. Only a fraction of PFAS are currently monitored and regulated and the presence and effects on aquatic organisms of many PFAS are largely unknown. The aim of this study is to investigate the health effects of environmentally relevant concentrations of PFAS on aquatic organisms at different consumer trophic levels through a systematic review and meta-analysis. The main result shows that PFAS in concentrations up to 13.5 μg/L have adverse effects on body size variables for secondary consumers. However, no significant effects on liver or gonad somatic indices and neither on fecundity were found. In addition, the results show that there are large research gaps for PFAS effects on different organisms in aquatic environments at environmentally relevant concentrations. Most studies have been performed on secondary consumers and there is a substantial lack of studies on other consumers in aquatic ecosystems.

    Fulltekst (pdf)
    fulltext
  • 32.
    Bathmann, Ulrich
    et al.
    Leibniz-Institute for Baltic Sea Research, Warnemünde, Germany.
    Schubert, Hendrik
    University of Rostock, Rostock, Germany.
    Andrén, Elinor
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Tuomi, Laura
    Finnish Meteorological Institute, Helsinki, Finland.
    Radziejewska, Teresa
    University of Szczecin, Szczecin, Poland.
    Kulinski, Karol
    Institute of Oceanology of the Polish Academy of Sciences, Sopot, Poland.
    Chubarenko, Irina
    Shirshov Institute of Oceanology of the Russian Academy of Sciences, Moscow, Russia.
    Editorial: Living Along Gradients: Past, Present, Future2020Inngår i: Frontiers in Marine Science, E-ISSN 2296-7745, Vol. 6, artikkel-id 801Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The Baltic Sea is a geologically and evolutionarily young part of the coastal ocean that experienced, in its past, several severe environmental changes. In its present state, the Baltic Sea is characterized by both horizontal and vertical gradients of environmental conditions. As a huge estuary, it shows a west to east/south to north surface salinity gradient from 24 in Kattegat to nearly freshwater in the Bothnian Bay. The vertical salinity and oxygen gradients result in stratification which causes hypoxic and sulfidic anoxic conditions in deep basins. These gradient systems are impacted by natural and anthropogenic changes due to physico-chemical driving forces, varying over time and space. Gradient environments produce an imprint on both the structure and function of the biological systems and influence biogeochemical cycling. Besides, coastal seas in general and the Baltic Sea in particular, experience constant and direct influence from land with consequences to matter and energy cycles, biogeochemical interactions, energy fluxes, and sediment dynamics. “Living along gradients: past, present, future” in the Baltic are today’s very important aspects that rise questions like which of the effects we are detecting occur naturally, and which are driven by human activities. Deciphering past environmental changes and their causes provide keys to understand and simulate possible future scenarios, all of which should rise societal awareness and implementation of appropriate marine and coastal policies. Present-day knowledge on the dynamics of gradient systems, on the processes that affect the coastal sea environment, the results of interaction between coastal seas and society, the detection or reconstruction of past and present changes on time scales from inter-annual to millennial, and future change models are summarized here, with the idea to stimulate scientific exchange on most complex questions, addressing them from different perspectives.

  • 33.
    Benulic, Kajsa-Stina
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    A Beef with Meat: Media and Audience Framings of Environmentally Unsustainable Production and Consumption2016Doktoravhandling, monografi (Annet vitenskapelig)
    Abstract [en]

    The aim of this thesis is to identify potential routes of participation in environmentally sustainable changes of the Swedish meat production and consumption. Changes are needed as meat production and consumption have been linked to serious environmental problems, such as climate change, biodiversity loss, and land use change. Scientists, international organizations, and Swedish government authorities have identified individual consumer responsibility as key in making that change happen. The public is to be informed and educated to make more environmentally sustainable choices as meat consumers, and become more supportive of policy instruments. This strategy, which mirrors the dominant approach to solving environmental problems, is suggested by government authorities despite their suspicion that media should have made most Swedes aware of the environmental impacts of meat.

    In this thesis potential participatory routes are identified through the analysis of Swedish news media and audience framings of meat production and consumption. Media framing is studied as an important source of information, and perhaps motivation, crucial in the individualized consumer responsibility approach. The media framing is studied through content analysis of mainstream and alternative radical newspapers. The audiences’ framing of meat may be influenced by media, but also by their everyday experiences, beliefs, values, and opinions. Focus group discussions with reception elements are the methods used for studying how audiences frame meat and use media in the process. The concept of participation is broadened to include passive and active forms to capture in which roles individuals consider to contribute to changing meat production and consumption. It is not self-evident that routes to change must include individual participation, since responsibility may be attributed to other actors, both by media and their audiences.

    The results imply only participatory route supported by media and audience framing. It is the one that mirrors the individualized consumer responsibility approach to solving environmental problems. The major barrier to the route is the audiences’ perceived inability to act. In an alternative route supported by both media and audience framing, state centered actors are made responsible for enforcing change. Here, the major barrier is the perceived unlikeliness of powerful actors assuming responsibility. Audiences construct no citizen roles for themselves to participate in. Neither does media, who only address audiences as consumers. Based on these findings it is suggested that the outlook for the individualized responsibility approach to making meat production and consumption environmentally sustainable is gloomy. At least if it the approach is to continuously rely on the information and motivation offered by media.

    Fulltekst (pdf)
    A Beef with Meat: Media and audience framings of environmentally unsustainable production and consumption
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  • 34.
    Berini, Francesca
    et al.
    Politecnico di Milano and University of Insubria, Varese, Italy.
    Presti, Ilaria
    Politecnico di Milano and University of Insubria, Varese, Italy / Chemo Biosynthesis, Corana, Pavia, Italy.
    Beltrametti, Fabrizio
    Actygea, Gerenzano, Varese, Italy.
    Pedroli, Marco
    Vårum, Kjell M
    Norwegian University of Science and Technology, Trondheim, Norway.
    Pollegioni, Loredano
    Politecnico di Milano and University of Insubria, Varese, Italy.
    Sjöling, Sara
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Marinelli, Flavia
    Politecnico di Milano and University of Insubria, Varese, Italy.
    Production and characterization of a novel antifungal chitinase identified by functional screening of a suppressive-soil metagenome2017Inngår i: Microbial Cell Factories, ISSN 1475-2859, E-ISSN 1475-2859, Vol. 16, nr 1, artikkel-id 16Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    BACKGROUND: Through functional screening of a fosmid library, generated from a phytopathogen-suppressive soil metagenome, the novel antifungal chitinase-named Chi18H8 and belonging to family 18 glycosyl hydrolases-was previously discovered. The initial extremely low yield of Chi18H8 recombinant production and purification from Escherichia coli cells (21 μg/g cell) limited its characterization, thus preventing further investigation on its biotechnological potential.

    RESULTS: We report on how we succeeded in producing hundreds of milligrams of pure and biologically active Chi18H8 by developing and scaling up to a high-yielding, 30 L bioreactor process, based on a novel method of mild solubilization of E. coli inclusion bodies in lactic acid aqueous solution, coupled with a single step purification by hydrophobic interaction chromatography. Chi18H8 was characterized as a Ca(2+)-dependent mesophilic chitobiosidase, active on chitin substrates at acidic pHs and possessing interesting features, such as solvent tolerance, long-term stability in acidic environment and antifungal activity against the phytopathogens Fusarium graminearum and Rhizoctonia solani. Additionally, Chi18H8 was found to operate according to a non-processive endomode of action on a water-soluble chitin-like substrate.

    CONCLUSIONS: Expression screening of a metagenomic library may allow access to the functional diversity of uncultivable microbiota and to the discovery of novel enzymes useful for biotechnological applications. A persisting bottleneck, however, is the lack of methods for large scale production of metagenome-sourced enzymes from genes of unknown origin in the commonly used microbial hosts. To our knowledge, this is the first report on a novel metagenome-sourced enzyme produced in hundreds-of-milligram amount by recovering the protein in the biologically active form from recombinant E. coli inclusion bodies.

  • 35.
    Berkevall, Catrine
    et al.
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Cerna, Jessica
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Urbana ekosystemtjänster: En evidensbaserad genomgång av urbana ekosystemtjänster och implementering i Slakthusområdet2021Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    More than 3,5 billion people currently lives in cities, a number that is expected to increase further. The densification of cities makes it increasingly difficult for people to access natural areas, at the same time as biological diversity is threatened. In this study, we highlight the importance of urban ecosystem services through social and ecological aspects. This study presents a summary of different evidence-based solutions that contribute with urban ecosystem services. It moreover uses a case of urban development in Slakthusområdet (Meatpacking district), Stockholm, in order to describe contemporary processes that integrate solutions that contribute to urban ecosystem services. The results show that there are challenges in implementing these solutions with respect to political, economic, and market factors. The study thereby identifies how examining authorities and policy demands on a green factor tool enable ecosystem service solutions. By studying ecosystem services as part of a social-ecological system, this study ultimately contributes with knowledge on the execution of multifunctional solutions, which are becoming ever more important with the densification of cities around the globe.

    Fulltekst (pdf)
    fulltext
  • 36.
    Bjärstig, Therese
    et al.
    Department of Political Science Umeå University, Sweden.
    Johansson, Johanna
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Mancheva, Irina
    Department of Political Science, Umeå University, Sweden.
    Sandström, Camilla
    Department of Political Science, Umeå University, Sweden.
    Collaboration as a policy instrument in public administration: Evidence from forest policy and governance2024Inngår i: Environmental Policy and Governance, ISSN 1756-932X, E-ISSN 1756-9338Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In recent decades, collaboration has become a common policy instrument in public administration, both internationally and in Sweden. Inspired by scholarly literature on collaborative governance, the aim of this study is to analyze the crucial role of public administration in the design and implementation of collaborative governance. Drawing on several years of research on Swedish forest policy and governance, our work is based on extensive empirical material, including 88 semi-structured interviews, observations, written comments from open public consultations and actors, enacted policy documents, open public hearings and a survey. Our results confirm that factors related to process design strongly affect the outputs and outcomes of collaboration in public administration. We assert that public officials should meticulously design and adapt the collaborative process during its initiation and progress, according to the policy problem and actors' incentives and motivations to participate. However, despite good intentions by public officials, the overarching priorities and contextual factors governing the policy area must be set by elected decision makers at an early stage to establish democratic accountability and high levels of policy legitimacy and acceptance. A major implication for public administration is that the increasing use of collaborative governance may be highly inefficient if it is difficult for participants to draft shared objectives and provide intended outputs because of low levels of trust, and different interpretations of knowledge and norms. Finally, in contentious policy areas, such as forest policy, political priorities must sometimes be set by elected decision makers rather than through collaborative processes.

  • 37.
    Björk, Mats
    et al.
    Stockholm University, Sweden.
    Asplund, Maria E
    University of Gothenburg, Sweden.
    Deyanova, Diana
    University of Gothenburg, Sweden.
    Gullström, Martin
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    The amount of light reaching the leaves in seagrass (Zostera marina) meadows2021Inngår i: PLOS ONE, E-ISSN 1932-6203, Vol. 16, nr 9, artikkel-id e0257586Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Seagrass meadows, and other submerged vegetated habitats, support a wide range of essential ecological services, but the true extents of these services are in many ways still not quantified. One important tool needed to assess and model many of these services is accurate estimations of the systems´ primary productivity. Such productivity estimations require an understanding of the underwater light field, especially regarding the amount of light that actually reaches the plants' photosynthetic tissue. In this study, we tested a simple practical approach to estimate leaf light exposure, relative to incoming light at the canopy, by attaching light sensitive film at different positions on leaves of Zostera marina, eelgrass, in four seagrass meadows composed of different shoot density and at two different depths. We found that the light reaching the leaves decreased linearly down through the canopy. While the upper parts of the leaves received approximately the same level of light (photosynthetic photon flux density, PPFD) as recorded with a PAR meter at the canopy top, the average light that the seagrass leaves were exposed to varied between 40 and 60% of the light on top of the canopy, with an overall average of 48%. We recommend that actual light interception is measured when assessing or modelling light depending processes in submerged vegetation, but if this is not achievable a rough estimation for vegetation similar to Z. marina would be to use a correction factor of 0.5 to compensate for the reduced light due to leaf orientation and internal shading.

  • 38.
    Björklund, Elin
    et al.
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Jörnstedt, Lisa
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Konsumenters inställning till lokalproducerade livsmedel och svensk livsmedelsproduktion: samt vad det finns för utmaningar och möjligheter för verksamheter som erbjuder detta2022Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Behovet av att se över kopplingarna mellan livsmedelsförsörjningen, hållbarhet och suveränitet - vid tillhandahållandet av livsmedel - har ökat i och med en instabil och osäker omvärld. En ökad lokal och småskalig livsmedelsproduktion skulle på ett nationellt plan kunna göra livsmedelssystemet mer robust och resilient vid eventuella störningar. Denna studie avser att ge en bred bild av konsumenters attityd, engagemang, kunskap och beteende kring beredskapsfrågan, livsmedelssäkerhet samt konsumtion av lokalproducerade varor. Studien avser också undersöka Sveriges nationella ambitionsnivå för att främja utvecklingen av en hållbar, långsiktigt och konkurrenskraftig livsmedelskedja och på vilket sätt samhället bidrar eller kan bidra till att underlätta och stimulera den typen av näringsverksamhet. Resultatet visar att det råder en stark positiv attityd, medelhög kunskapsnivå, medelhögt engagemang samt starkt positivt beteende bland respondenterna. Resultatet visar även att inställningen till lokalproducerade livsmedel är positiv och att den framför allt kan härledas till känslan av samhörighet och värnandet om den lokala levande landsbygden. Gällande beredskapsfrågan så råder det bland respondenterna en tydlig koppling till småskalig och lokalproducerad livsmedelsproduktion såväl som till självförsörjning. Det föreligger dock stora hinder med småskaliga verksamheter i form av pris och tillgänglighet, både i form av utbud, öppettider och kommunikation. Det är idag mest resursstarka konsumentgrupper som köper lokalproducerat och det finns en risk för en ökande segregation i detta. Staten skulle kunna driva på för att få på plats en definition av lokalproducerade livsmedel samt arbeta med mjuka styrmedel såsom exempelvis miljömärkningar. De skulle också kunna höja taket för direkta upphandlingar inom ramen för EU-direktivet om offentlig upphandling så att kommunerna kan köpa in en större andel lokalproducerade livsmedel i sin offentliga upphandling. 

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  • 39.
    Björn, Johanna
    et al.
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Halldén, Emelie
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    En fallstudie om implementeringen av hydroponiska stadsodlingar i urbana miljöer2022Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    The purpose of this paper is to investigate, based on a comparative study in Sweden, how vertical hydroponic farms can be implemented in urban environments and to identify the challenges with the implementation. The study examines various companies that work with hydroponic farms in Sweden and how the government can help the companies with the implementation of the innovation. Urban hydroponic farms can be a significant solution for solving the growing global population demand for locally grown fresh food, which includes good quality and nutrients. Previous studies, from a sustainability perspective, show that Sweden would benefit in several different ways if more hydroponic farms were implemented in the urban cities. The theory that the report is based on is the implementation theory. With this in mind, the empirics were analyzed from three different found themes; economy, political priorities & local involvement. Empirical data was collected from previous studies as well as from a qualitative methodological approach. This empirical study was based on multiple interviews with companies in the hydroponic farms industry located in Sweden and observations, to be able to analyze the findings based on our chosen theme. In this study we found that the result indicates that there are both advantages and obstacles to the implementation of hydroponic farms in urban areas. On the other hand, the benefits are predominantly from a sustainable development perspective with new innovative solutions, such as solar systems and upgraded district heating and district cooling systems.

    Fulltekst (pdf)
    fulltext
  • 40.
    Björnberg, Karin Edvardsson
    et al.
    KTH.
    Karlsson, Mikael
    KTH.
    Gilek, Michael
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Hansson, Sven Ove
    KTH.
    Climate and environmental science denial: A review of the scientific literature published in 1990–20152017Inngår i: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 167, s. 229-241Artikkel, forskningsoversikt (Fagfellevurdert)
    Abstract [en]

    Abstract Denial of scientific findings is neither a new nor an unexplored phenomenon. In the area of environmental science and policy though, the research on denial has not been systematically summarized and analyzed. This article reviews 161 scientific articles on environmental and climate science denial published in peer reviewed international journals in the last 25 years and aims to both identify research gaps and enable learning on the phenomenon. Such knowledge is needed for the increasingly important task to provide effective response to science denial, in order to put an end to its influence on environmental policy making. The review, which is based on articles found in the databases Web of Science, Scopus and Philosopher's Index, shows that denial by far is most studied in relation to climate change, with a focus on Anglo-American countries, where this form of denial is most common. Other environmental issues and other geographical areas have received much less scientific attention. While the actors behind climate science denial, their various motives and the characteristics of their operations have been thoroughly described, more comparative research between issues and countries is needed in order to draw reliable conclusions about the factors explaining the peculiarities of denial. This may in turn lay the ground for developing and actually testing the effectiveness and efficiency of strategies to counter environmental science denial. Irrespective of the ambitions of environmental goals, science-based policies are always preferable. The scientific community therefore needs to increase its efforts to dismantle false claims and to disclose the schemes of denialists.

  • 41.
    Blankestijn, Wouter
    et al.
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap. Södertörns högskola, Centrum för Östersjö- och Östeuropaforskning (CBEES), Baltic & East European Graduate School (BEEGS).
    Martin, Anna
    SLU.
    Naunova, Kristina
    Uppsala University.
    von Essen, Erica
    The Norwegian Institute for Nature Research (NINA), Trondheim, Norway.
    Strategic Rights vs ‘Naturally’ Emerging Relations: An Interdisciplinary Examination of the Rights of Nature Movement2020Konferansepaper (Annet vitenskapelig)
  • 42.
    Bolinder, K.
    et al.
    Stockholm University.
    Norbäck Ivarsson, Lena
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Humphreys, A. M.
    Stockholm University / Imperial College London, UK.
    Ickert-Bond, S. M.
    University of Alaska Fairbanks, Fairbanks, AK, USA / Arizona State University, Tempe, AZ, USA.
    Han, F.
    China University of Geosciences, Wuhan, China.
    Hoorn, C.
    University of Amsterdam, Amsterdam, The Netherlands.
    Rydin, C.
    Stockholm University.
    Pollen morphology of Ephedra (Gnetales) and its evolutionary implications2016Inngår i: Grana, ISSN 0017-3134, E-ISSN 1651-2049, Vol. 55, nr 1, s. 24-51Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The Ephedra lineage can be traced at least to the Early Cretaceous. Its characteristically polyplicate pollen is well-represented in the fossil record and is frequently used as an indicator of paleoclimate. However, despite previous efforts, knowledge about variation and evolution of ephedroid pollen traits is poor. Here, we document pollen morphology of nearly all extant species of Ephedra, using a combination of scanning electron microscopy (SEM) and light microscopy (LM), and reconstruct ancestral states of key pollen traits. Our results indicate that the ancestral Ephedra pollen type has numerous plicae interspaced by unbranched pseudosulci, while the derived pollen type has branched pseudosulci and (generally) fewer plicae. The derived type is inferred to have evolved independently twice, once along the North American stem branch and once along the Asian stem branch. Pollen of the ancestral type is common in Mesozoic fossil records, especially from the Early Cretaceous, but it is less commonly reported from the Cenozoic. The earliest documentation of the derived pollen type is from the latest Cretaceous, after which it increases strongly in abundance during the Paleogene. The results of the present study have implications for the age of crown group Ephedra as well as for understanding evolution of pollination syndromes in the genus.

  • 43.
    Bonca, Sandra
    et al.
    University of Ljubljana, Ljubljana, Slovenia.
    Udovc, Andrej
    University of Ljubljana, Ljubljana, Slovenia.
    Rodela, Romina
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    A social marketing perspective on road freight transportation of fresh fruits and vegetables: a Slovene case2017Inngår i: Ekonomska Istrazivanja, ISSN 1331-677X, E-ISSN 1848-9664, Vol. 30, nr 1, s. 1132-1151Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    With the large increase in transportation over the last decades and the associated negative impacts upon the environment and society, a more sustainable use of transport is a crucial policy issue. This analysis focuses on road freight transport of selected produce (carrots, cabbage, apples and pears) with the aim to appraise the sustainability of road freight transport of these for the Slovene market. To this end, we take into account self-sufficiency, import and export features, transport needs, produce origin and prices differences between domestic and non-domestic produce. The method used for obtaining transported quantities, exported from and imported to the county, was material flow accounts (MFA). Then we undertook an analysis of sustainability of road transport of produce where we considered the country's transport needs. The study finds that road freight transport for selected produce is not sustainable. Recognising the normative dimensions of sustainability, the role of social marketing in this context is explored and suggestions on how to promote more sustainable transport solutions advanced.

  • 44.
    Bonow, Madeleine
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Conflict or convergence?: Products of origin. An analysis of the Swedish case of Baltic Sea fish2013Inngår i: Baltic Worlds, ISSN 2000-2955, E-ISSN 2001-7308, Vol. VI, nr 3-4, s. 48-51Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In response to the contemporary globalization ofthe economy, food markets are shifting toward differentiation of services and products based on theunique qualities and attributes of the products. Aparadigm called the “quality turn” corresponds to the increasing variety of food services. “Alternative foods”,including organic products or products qualified bytheir origin, and new methods of marketing the sefoods (farmer’s markets, local contracts, etc.) are developingthrough the mainstreaming of innovation. Protected designation of origin (PDO) is a certificationscheme that certifies products by their origin, and is one of several important tools to strengthen the competitiveness of rural areas, especially for smallscalefood processing in rural and less-developed areas in Europe. A PDO provides groups of producers with protection against unfair competition for products whose unique sensory characteristics essentially depend on the local geographic and cultural conditions as well as the local know-how of the productionsite. A PDO certification informs consumers that the product quality and its value depend on the geographic origin of the product. Despite the potential value of PDOs for producers, their use is unevenly distributed throughout the EU. The organization of the qualitycertification systems and corresponding legal provisions vary between countries. France, Italy, and Spainare models for the development of the PDO schemeand have more than 800 PDO-certified products. However, countries such as Sweden, Finland, andDenmark have a much smaller number of products that are certified. In Sweden, several products have applied for a PDO, but only one, Kalix Löjrom, has been certified under the scheme. The reason for this failure is mainly that Sweden’s current customs do not correspond to the rules and traditions used to createthe PDO scheme. To increase the likelihood of successfully obtaining PDOs, Sweden should work to reinvent local knowledge and local food and to recover its traditional food culture.

  • 45.
    Bonow, Madeleine
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Hästen i det peri-urbana landskapet - vems tolkningsföreträde råder?2022Inngår i: Kulturella perspektiv - Svensk etnologisk tidskrift, ISSN 1102-7908, Vol. 30Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [sv]

    I och med att hästen tar allt större plats i det peri-urbana landskapet sker det en omstrukturering av både det sociala och det fysiska landskapet. Denna ”hästifiering” omfattar ofta en typ av livsstilsmigration, där den peri-urbana landsbygdens nya invånare och inpendlare (hästägarna) omvandlar miljön. Hästarnas ökade närvaro påverkar nämligen både det privata och det offentliga rummet. Med stöd i över 30 intervjuer konstaterar studien att denna omstrukturering av det peri-urbana landskapet skapar konflikter mellan ”nya” (livsstilsmigranter, hästägare) och de ”gamla” som bott där sedan tidigare (jordbrukare och markägare), vilket kan tolkas som motsättningar mellan grupper med olika ideologier och värderingar där rurala förhållningssätt utmanas av en urban norm. En central aspekt av dessa ”kulturkrockar” är att en urban norm om landskapet som yta för konsumtion och rekreation ofta står i motsatsställning till rurala värderingar och praktiker där landskapet i högre grad utgör en källa till försörjning.

  • 46.
    Bonow, Madeleine
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Modern gethållning och getostproduktion2017Inngår i: Geten i Sverige: Kulturhistoriska och samtida perspektiv / [ed] Katharina Leibring och Ingvar Svanberg, Uppsala: Institutet för språk och folkminnen , 2017, s. 135-152Kapittel i bok, del av antologi (Annet vitenskapelig)
    Abstract [sv]

    This article discusses the re-emergence and modernisation of traditional goat cheese production in Sweden, in particular in the northern county of Jämtland. The data have been gathered through fieldwork and interviews with goat farmers, authorities and others involved in the production of goat cheese. As early as the 1970s, a number of initiatives were taken to formalise the productive activities of this sector and to improve product quality. The most important project was the launch of the cooperative Jämtspira at the beginning of the 1980s. In contrast to other Swedish cooperatives, this organisation involved its members in developing a common trademark and a standardised product range, undertaking joint marketing efforts, and finding creative solutions to infrastructure problems. Jämtland was strengthened and modernised, largely owing to the active part played by regional authorities in this process. The national artisan centre Eldrimner, which became a hub for small-scale food production, is another important institution that has strengthened local knowledge and taught cheesemaking skills to new goat farmers from all over Sweden. Although many obstacles have been removed and the sector has found successful solutions to strategic issues relating to product development and marketing, there are still significant structural shortcomings that could reduce profitability and endanger the future development of the sector. 

    Fulltekst (pdf)
    fulltext
  • 47.
    Bonow, Madeleine
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Strategies to promote local food production and rural development: the case of Jämtland cheese2014Inngår i: Food and Rurality in Europe: Economy, Environment and Insitutions in Contemporary Rural Europe / [ed] Paulina Rytkönen, Huddinge: COMREC, Södertörns Högskola , 2014, s. 129-156Kapittel i bok, del av antologi (Fagfellevurdert)
  • 48.
    Bonow, Madeleine
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Swedish fishing in the wake of ITQ2017Inngår i: Fisheries, Quota, Management and Quota Transfer: Rationalization through Bio-economics / [ed] Gordon M. Winder, Cham: Springer, 2017, s. 141-158Kapittel i bok, del av antologi (Fagfellevurdert)
  • 49.
    Bonow, Madeleine
    et al.
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Cios, Stanislaw
    Ministry of Foreign Affairs, Warsaw, Poland.
    Svanberg, Ingvar
    Uppsala universitet.
    Fishponds in teh Baltic States: Historical Cyprinid Culture in Estonia, Latvia and Lithuania2016Inngår i: Historical Aquaculture in Northern Europe / [ed] M. Bonow; H. Olsén; I. Svanberg, Huddinge: Södertörns högskola, 2016, s. 139-156Kapittel i bok, del av antologi (Fagfellevurdert)
    Fulltekst (pdf)
    fulltext
  • 50.
    Bonow, Madeleine
    et al.
    Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.
    Gröntoft, Magnus
    Jordbruksverket.
    Gustafsson, Sofia
    Linköpings universitet.
    Lindberg, Markus
    Sankta Birgitta klostermuseum.
    Inledning2016Inngår i: Biskop Brasks måltider: svensk mat mellan medeltid och renässans / [ed] Madeleine Bonow, Magnus Gröntoft, Sofia Gustafsson, Markus Lindberg, Stockholm: Bokförlaget Atlantis, 2016, s. 9-15Kapittel i bok, del av antologi (Annet vitenskapelig)
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