Sökning: "zooplankton"

Visar resultat 16 - 20 av 53 uppsatser innehållade ordet zooplankton.

  1. 16. Transport och upptag av makronäringsämnen i ytvatten : Vilka faktorer påverkar transport och upptag av makronäringsämnen i ett mindre avrinningsområde?

    Kandidat-uppsats, Linnéuniversitetet/Institutionen för biologi och miljö (BOM)

    Författare :Erika Svensson; [2021]
    Nyckelord :makronäringsämnen; ytvatten; avrinningsområde;

    Sammanfattning : The availability of nutrients is the foundation of our ecosystems both on land and in the sea. The processes that control the surplus of nutrients and the biogeochemical cycle are linked to several important environmental issues and therefore important to know. LÄS MER

  3. 17. Responses to declining zoobenthos abundance : Changes over time in diet and growth of Arctic charr (Salvelinus alpinus)

    Master-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Douglas Skarp; [2020]
    Nyckelord :charr; zoobenthos; growth; diet;

    Sammanfattning : A decline in the density of zoobenthos has taken place in Lake Abiskojaure in the northern Swedish mountains between 1988 and 2019 but no response can be seen in the abundance (CPUE) of Arctic charr (Salvelinus alpinus) that feed mainly on benthic invertebrates. To evaluate if possible shifts in resource use of charr explain this lack of change in population abundance, stomach contents (i. LÄS MER

  4. 18. Spatial patterns of zooplankton communities In Swedish mountain and boreal lakes.

    Kandidat-uppsats,

    Författare :Juan Manuel de la Quintana; [2020]
    Nyckelord :Lake; zooplankton; phytoplankton; DOC and DIN:TP.;

    Sammanfattning :     Zooplankton is crucial for lake ecosystems as it is an important component in most of the food webs of these ecosystems. However, environmental changes have caused reductions in ecosystems nutrients and stoichiometry, which directly affects phytoplankton’s development and quality. LÄS MER

  5. 19. Nitrogen runoff, constructed wetlands and the effect on catch of fish in the Öresund strait

    Master-uppsats, Lunds universitet/Miljövetenskaplig utbildning

    Författare :Saga Hedstigen Sundblad; [2020]
    Nyckelord :seafloor oxygen demand; fish catch; constructed wetland; Earth and Environmental Sciences;

    Sammanfattning : Eutrophication and low dissolved oxygen levels are spreading all over the world, causing changes in fish distribution and decline in fish abundance and catch of fish. This study assesses the current nitrogen (N) surface runoff to the Öresund strait, the seafloor oxygen demand it cause, the subsequent effect on fish catch, and the constructed wetland area needed to retain current N loads. LÄS MER

  7. 20. Responses to declining zoobenthos abundance : Changes over time in diet and growth of Arctic charr (Salvelinus alpinus)

    Master-uppsats,

    Författare :Douglas Skarp; [2020]
    Nyckelord :charr; zoobenthos; growth; diet;

    Sammanfattning : A decline in the density of zoobenthos has taken place in Lake Abiskojaure in the northern Swedish mountains between 1988 and 2019 but no response can be seen in the abundance (CPUE) of Arctic charr (Salvelinus alpinus) that feed mainly on benthic invertebrates. To evaluate if possible shifts in resource use of charr explain this lack of change in population abundance, stomach contents (i. LÄS MER