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  • 1.
    Boström, Magnus
    et al.
    Örebro University.
    Gilek, Michael
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.
    Hedenström, Eva
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies.
    Jönsson, Anna Maria
    Södertörn University, School of Culture and Education, Media and Communication Studies.
    How to achieve sustainable procurement for “peripheral” products with significant environmental impacts2015In: Sustainability: Science, Practice, & Policy, ISSN 1548-7733, E-ISSN 1548-7733, Vol. 11, no 1, 21-31 p.Article in journal (Refereed)
    Abstract [en]

    Departing from previous theoretical and empirical studies on sustainable supply-chain management, we investigate organizational commitment (drivers and motivations) and capabilities (resources, structures, and policy instruments) in sustainable procurement of “noncore” products. By focusing on chemicals in textiles, the article explores the activi-ties of differently sized organizations and discusses the potentials and limitations of sustainable procurement measures. The study is based on a qualitative and comparative approach, with empirical findings from 26 case stud-ies of Swedish public and private procurement organizations. These organizations operate in the sectors of hotels/ conference venues, transport, cinema, interior design, and hospitals/daycare. While this work demonstrates major challenges for buyers to take into account peripheral items in sustainable procurement, it also identifies constructive measures for moving forward. A general sustainability/environmental focus can, as an effect, spill over to areas per-ceived as peripheral. © 2014 Boström et al.

  • 2.
    Dahlgren, Elin
    et al.
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies. Swedish Environm Protect Agcy.
    Lehtilä, Kari
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.
    Tolerance to apical and leaf damage of Raphanus raphanistrum in different competitive regimes2015In: Ecology and Evolution, ISSN 2045-7758, E-ISSN 2045-7758, Vol. 5, no 22, 5193-5202 p.Article in journal (Refereed)
    Abstract [en]

    Tolerance to herbivory is an adaptation that promotes regrowth and maintains fitness in plants after herbivore damage. Here, we hypothesized that the effect of competition on tolerance can be different for different genotypes within a species and we tested how tolerance is affected by competitive regime and damage type. We inflicted apical or leaf damage in siblings of 29 families of an annual plant Raphanus raphanistrum (Brassicaceae) grown at high or low competition. There was a negative correlation of family tolerance levels between competition treatments: plant families with high tolerance to apical damage in the low competition treatment had low tolerance to apical damage in the high competition treatment and vice versa. We found no costs of tolerance, in terms of a trade-off between tolerance to apical and leaf damage or between tolerance and competitive ability, or an allocation cost in terms of reduced fitness of highly tolerant families in the undamaged state. High tolerance bound to a specific competitive regime may entail a cost in terms of low tolerance if competitive regime changes. This could act as a factor maintaining genetic variation for tolerance.

  • 3.
    Porseryd, Tove
    et al.
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.
    Kellner, Martin
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.
    Reyhanian, Nasim
    Örebro University.
    Volkova, Kristina
    Örebro University.
    Elabbas, Lubna
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Biology.
    Ullah, Shahid
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies. Karolinska University Hospital Laboratory.
    Olsén, K. Håkan
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.
    Dinnétz, Patrik
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.
    Porsch Hällström, Inger
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.
    Combinatory effects of low concentrations of 17α-etinylestradiol and citalopram on non-reproductive behavior in adult zebrafish (Danio rerio)2017In: Aquatic Toxicology, ISSN 0166-445X, E-ISSN 1879-1514, Vol. 193, 9-17 p.Article in journal (Refereed)
    Abstract [en]

    Sewage treatment plant effluents contain a complex mixture of pharmaceuticals, personal care products and industrial chemicals, thus exposing aquatic organisms. Still, the consequences of exposure to combinations of different classes of drugs is largely unknown. In this study, we expose adult zebrafish (Danio rerio) males and females to low, environmentally relevant concentrations of the endocrine disrupting chemical 17α-ethinyl estradiol (EE2) and the selective serotonin re-uptake inhibitor (SSRI) citalopram, alone and in combination, and analyse three non-reproductive behaviours of importance for population fitness.

    Two weeks exposure to 0.1 and 0.5 ng/LEE2 resulted in increased anxiety in males in the scototaxis (light/dark preference) test. Significantly longer latency periods before entering the white zone and fewer visits in the white zone were observed in males exposed to both 0.1 and 0.5 ng/LEE2 compared to unexposed males. No significant effects of citalopram alone (0.1 and 0.5 µg/L) were observed in the scototaxis test. The combined exposures (0.1 ng/L EE2 + 0.1 µg/L citalopram and 0.5 ng/L EE2 + 0.5 µg/L citalopram) resulted in abolishment of the anxiogenic effects of EE2, with significantly shorter latency period (low dose) and more transitions to white (high and low dose) than in fish exposed to EE2 alone. No significant effects of either EE2, citalopramor the combination of the two were observed in females. In the novel tank test, significantly more transitions to the upper half of the tank were observed in males exposed to 0.1 µg/L citalopram alone compared to unexposed males while males exposed to 0.1 ng/lEE2 had significantly shorter latency period to enter the upper half. Exposure to the combination of the two low concentrations did, however, result in a significantly longer latency and fewer transitions to upper half compared to both control, EE2- and citalopram-exposed males. These males also spent significantly less time in the upper half than the fish exposed to 0.1 ng/l EE2 or 0.1 µg/l citalopram alone. No significant effects on novel tank behaviour were observed in females or males exposed to the higher concentrations. In the shoaling test, males exposed to 0.1 µg/L citalopram and females exposed to 0.5 ng/l EE2 made significantly fewer transitions away from peers while males exposed to 0.1 µg/L citalopram + 0.1 ng/l EE2 performed significantly more transitions than the fish exposed to 0.1 µg/L citalopram alone.

    In conclusion, this study shows that very low concentrations ofEE2, at or slightly above the predicted noeffect concentration (NOEC), affects anxiety in zebrafish males. Furthermore, citalopram, in spite of marginal effect of its own at such low levels, counteracts the response to EE2. This study represents an initial effort to understand the effects on water-living organisms of the cocktails of anthropogenic substances contaminating aquatic environments.

  • 4.
    Thureborn, Petter
    et al.
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.
    Franzetti, Andrea
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies. University of Milano-Bicocca, Milano, Italy.
    Lundin, Daniel
    Science for Life Laboratories / Linnéuniversitetet.
    Sjöling, Sara
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Biology.
    Reconstructing ecosystem functions of the active microbial community of the Baltic Sea oxygen depleted sediments2016In: PeerJ, ISSN 2167-8359, E-ISSN 2167-8359, Vol. 4, e1593Article in journal (Refereed)
    Abstract [en]

    Baltic Sea deep water and sediments hold one of the largest anthropogenically induced hypoxic areas in the world. High nutrient input and low water exchange result in eutrophication and oxygen depletion below the halocline. As a consequence at Landsort Deep, the deepest point of the Baltic Sea, anoxia in the sediments has been a persistent condition over the past decades. Given that microbial communities are drivers of essential ecosystem functions we investigated the microbial community metabolisms and functions of oxygen depleted Landsort Deep sediments by metatranscriptomics. Results show substantial expression of genes involved in protein metabolism demonstrating that the Landsort Deep sediment microbial community is active. Identified expressed gene suites of metabolic pathways with importance for carbon transformation including fermentation, dissimilatory sulphate reduction and methanogenesis were identified. The presence of transcripts for these metabolic processes suggests a potential for heterotrophic-autotrophic community synergism and indicates active mineralisation of the organic matter deposited at the sediment as a consequence of the eutrophication process. Furthermore, cyanobacteria, probably deposited from the water column, are transcriptionally active in the anoxic sediment at this depth. Results also reveal high abundance of transcripts encoding integron integrases. These results provide insight into the activity of the microbial community of the anoxic sediment at the deepest point of the Baltic Sea and its possible role in ecosystem functioning.

  • 5.
    Thureborn, Petter
    et al.
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science. Stockholm University.
    Lundin, Daniel
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies. KTH & Stockholm University.
    Plathan, Josefin
    Stockholm University.
    Poole, Anthony M
    School of Biological Sciences, University of Canterbury, Christchurch, New Zealand.
    Sjöberg, Britt-Marie
    Stockholm University.
    Sjöling, Sara
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.
    A Metagenomics Transect into the Deepest Point of the Baltic Sea Reveals Clear Stratification of Microbial Functional Capacities2013In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 8, no 9, e74983Article in journal (Refereed)
    Abstract [en]

    The Baltic Sea is characterized by hyposaline surface waters, hypoxic and anoxic deep waters and sediments. These conditions, which in turn lead to a steep oxygen gradient, are particularly evident at Landsort Deep in the Baltic Proper. Given these substantial differences in environmental parameters at Landsort Deep, we performed a metagenomic census spanning surface to sediment to establish whether the microbial communities at this site are as stratified as the physical environment. We report strong stratification across a depth transect for both functional capacity and taxonomic affiliation, with functional capacity corresponding most closely to key environmental parameters of oxygen, salinity and temperature.

    We report similarities in functional capacity between the hypoxic community and hadal zone communities, underscoring the substantial degree of eutrophication in the Baltic Proper. Reconstruction of the nitrogen cycle at Landsort deep shows potential for syntrophy between archaeal ammonium oxidizers and bacterial denitrification at anoxic depths, while anaerobic ammonium oxidation genes are absent, despite substantial ammonium levels below the chemocline. Our census also reveals enrichment in genetic prerequisites for a copiotrophic lifestyle and resistance mechanisms reflecting adaptation to prevalent eutrophic conditions and the accumulation of environmental pollutants resulting from ongoing anthropogenic pressures in the Baltic Sea.

  • 6.
    Vinter, Tiina
    et al.
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Biology.
    Dinnetz, Patrik
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.
    Danzer, Ulrika
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies.
    Lehtilä, Kari
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.
    The relationship between landscape configuration and plant species richness in forests is dependent on habitat preferences of species2016In: European Journal of Forest Research, ISSN 1612-4669, E-ISSN 1612-4677, Vol. 135, no 6, 1071-1082 p.Article in journal (Refereed)
    Abstract [en]

    To assess the effects of landscape configuration on local plant species richness, we tested whether local species richness of forest understory plants is affected by the total forest area and forest edge length in the adjacent landscape. We also tested whether the landscape effect on species richness is different for forest and edge species. We estimated species richness from 113 forest sites in four regions in Northern Europe. At each site, we studied two plots, one at the edge and one in the core of the forest. Total forested area and forest edge length in circles with a 1-km radius, together with plot-specific variables of environmental conditions and temporal continuity of forests, were recorded at each plot. The amount of forest and the length of the forest edge in the adjacent landscape had a significant positive effect on local species richness of all understory plant species. As expected, edge species were positively affected by increasing length of the forest edge in the landscape, but surprisingly there was no effect of forest area on species richness of forest species. Temporal forest continuity had a negative effect on species richness of edge species but no effect on species richness of forest species. Our results suggest that forest edge length had a stronger landscape effect on understory plant species richness than forest area. Implications of these findings for the management of forest landscapes depend on priorities given to different species groups in biodiversity conservation, i.e. if emphasis is in total species richness or species richness of forest or edge species.

  • 7.
    Volkova, Kristina
    et al.
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Biology. Örebro University.
    Reyhanian Caspillo, Nasim
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Biology. Örebro university.
    Porseryd, Tove
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.
    Hallgren, Stefan
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies. Uppsala university.
    Dinnetz, Patrik
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.
    Olsén, Håkan
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Biology.
    Porsch Hällström, Inger
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Biology.
    Transgenerational effects of 17α-Ethinyl Estradiol on anxiety behaviour in the guppy, Poecilia reticulata2015In: General and Comparative Endocrinology, ISSN 0016-6480, E-ISSN 1095-6840, Vol. 223, 66-72 p.Article in journal (Refereed)
1 - 7 of 7
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