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  • 1.
    Bärgård, Jennifer
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.
    Vi-skogens kommunikation om sin verksamhet till intressenter: - Retoriskanalys av bild och text2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    ABSTRACT

    Vi-Agroforestry communication has been studied to see how they use communication as a tool to attract donors. The aim is to be able to contribute to shed some light on the importance of image and text as a unified communication. Its about acknowledge what the sender (aid organization) sends out to tell potential donors. It examines how the organization communicates the problems they want to solve, which method they want to solve it with and why their organization should be the preferred option before the interest is gone by the recipient. By examine the reliability (ethos), the emotional connection (pathos) and the factual conviction (logos) of the Vi Agroforestry communication it helps to understand the organizations way of communicate with their listeners.

    The study examined Vi-Agroforestry communication through image and text. The author hopes to contribute to explore what an aid organization, like Vi-Agroforestry, choose to focus on regarding when they get to talk about their organization and their work. The organization has been analyzed based on the rhetorical basics to go on to see which framework they create their communications.

  • 2.
    Nilsson, Elinor
    et al.
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.
    Nordin, Therese
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.
    100 år av miljöförändringar som de registrerats i Hallsfjärden, västra Östersjön: En biostratigrafisk studie om vad bevarade kiselalger i sediment kan berätta om tidigare miljöförhållande i Hallsfjärden.2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Diatoms are microscopic, photosynthetic, single-celled organisms that are useful in studies of water qualities (eg pH, nutrients, salinity). By analyzing changes in the species composition of diatoms back in time, gives an opportunity to interpret the marine environment affected by various factors (Andren et al, 1999). The aim of the study was to study changes in diatom abundance and composition in Hallsfjärden, a bay in the Baltic Sea located north of Himmerfjärden in Södertälje. The site was chosen because it is a bay that is assumed to have a large environmental impact due to external factors such as increased population growth, water treatment plants, industrial areas, dredging and a link to Lake Mälaren. The purpose of the study therefore to investigate whether there was an environmental impact in Hallsfjärden, in order to draw conclusions about what happened in the area and what has affected the water the last 100 years.

         The survey is conducted by sampling sediment cores, studied by biostratigraphy of fossil diatoms to reconstruct past environmental conditions. The results of the analysis showed that oxygen deficiency was a particular problem, which is related to the eutrophication that are threatening some diatoms and thereby changes the species composition of ecosystems in Hallsfjärden. A plausible interpretation of the analyze results is that Hallsfjärden was adversely affected by the Södertalje area's population growth and Himmerfjärdsverkets startup by high emissions of nutrients. It has on the other hand appeared a positive impact for Himmerfjärdsverkets gradually improved purification with clearer water conditions. Hallsfjärden have proved to be a particularly sensitive ecosystem in this study, with low salinity and strong thermocline, which means that it is more affected by eutrophication and pollution in its drainage area. This causes a problem of eutrophication in Hallsfjärden due to the bay showing the influence of the surrounding areas and its emissions, which later exports further to the Baltic Sea via Himmerfjärden with the southbound flow.

  • 3.
    Sukovich, Ninél
    et al.
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.
    Backman, Jennifer
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.
    Kan musselextrakt (Mytilus edulis) inducera födosök hos omnivoren ruda, Carassius carassius (Linnaeus, 1758)?2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Over the last three decades there has been a significant increase in aquaculture production and the demand for farmed fish is predicted to rise further. More fish are being caught to become fishmeal in aquaculture, than for direct human consumption use, while a large number of fish stocks are being depleted. Many popular farmed species are carnivores and thus brought up on a diet consisting of fishmeal and fish oil. However, several studies have shown that several fish species can be brought up on a diet consisting of mussel meal instead of fishmeal. If so, this finding can possibly lead to a more sustainable fishing in the future by reducing the number of wild-caught fish. The purpose of this study has been to examine if mussel meal extract can induce foraging in the omnivorous species crucian carp (Carassius carassius), a commercial fish that is mainly farmed in China. Induced foraging can indicate that crucian carp could become accustomed to mussels, even though mussels are not part of its natural food source. The results revealed that foraging was induced in the crucian carp by conventional feed for carp, the control diet, but not by extract of mussels.

  • 4.
    Thölberg, Anton
    et al.
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.
    Brusell, Fanny
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.
    Förekomst av växtarter i en fragmenterad skogsmiljö utifrån en öbiogeografisk teori2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This study address the problem of fragmentation, and its impact on species distribution and abundance. The main aim of the study was to test the theory of island biogeography using plant species prevalence from field islets at different distances from nearest “mainland”. We have studied 40 pairs of field islets (islands) and forest edges (mainland) in agricultural landscapes in the Stockholm County. The result of the inventory was analyzed using univariate linear models-, and multivariate ordination. Our result show that the theory of island biogeography partly can explain species prevalence patterns, but not all of them. Furthermore, we found that species distributions were limited by the size of the field islets. Distance from mainland had an effect on the species composition in the field islets. Our results indicate a need to include the size of habitat fragments, and the degree of isolation as important factors determining the ability for future species dispersal to newly established habitats.

  • 5.
    Westerdahl, Linn
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.
    Miljöcertifiering inom frisörbranschen: Grön Salongs miljöcertifiering2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    I dagens samhälle exponeras vi dagligen för flera skadliga kemikalier. Frisörbranschen är en bransch där ett flertal skadliga ämnen används som exempelvis parafenylendiaminedia och resorcinol. Enligt svensk lag är användningen av skadliga ämnena inom frisörbranschen oreglerad. Detta på grund av att frisörsalonger inte är anmälningspliktiga verksamheter. En miljöcertifiering används av kunder som en försäkran om att en certifierad salong är ett miljövänligare alternativ. I denna uppsats undersöks frisörernas perspektiv på miljöcertifieringen Grön Salong och vad som påverkar certifieringens utbredning. Resultatet har nåtts genom en enkätundersökning och semi-strukturerade intervjuer med frisörsalonger med anknytning till Grön Salong. En intervju med en styrelsemedlem från Grön Salong har genomförts för att spegla organisationens perspektiv. Resultatet visar att Grön Salong har många brister som gör att frisörsalonger väljer att avstå från att fortsätta vara certifierade efter några år. Den brist som frisörerna mest lyfter fram är den dåliga kommunikationen. Organisationens kommunikation upplevs som dålig, både offentligt på hemsidan och enskilt mellan organisation och frisör.

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