Sökning: "phytoplankton"

Visar resultat 21 - 25 av 54 uppsatser innehållade ordet phytoplankton.

  1. 21. Records of environmental change and sedimentation processes over the last century in a Baltic coastal inlet

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Hanna Nilsson; [2019]
    Nyckelord :Baltic Sea; eutrophication; coastal areas; archipelago; laminated sediments; nutrient inputs; carbon and nitrogen content; biogenic silica; sedimentation; environmental impact; marine geology; Earth and Environmental Sciences;

    Sammanfattning : The marine ecosystem in the Baltic Sea is affected by multiple stress factors, e.g. eutrophication and deoxygenation, overfishing and anthropogenic pollution. Here we evaluate the short-term trends of dissolved oxygen in bottom waters and changes in the primary productivity within a coastal inlet in the Baltic Sea. LÄS MER

  3. 22. Adaptive Evolution of Resource Use, Phenotypic Diversity, and Productivity of Phytoplankton Communities

    Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för fysik

    Författare :Nils Hellekant; [2019]
    Nyckelord :Adaptive Dynamics; phenotype; phytoplankton; plankton; BEF; Biodiversity; diversity; Spatial modeling; Ecosystem function; Evolution; Diversity;

    Sammanfattning : There is growing concern that the worldwide loss in biodiversity will harm the stability of the ecosystems, and thereby, the carrying capacity and critical ecosystem services the biosphere provides. Phytoplankton (microalgae) in lakes and oceans are arguably the most important primary producers. LÄS MER

  4. 23. Effekten av vägsalt på djurplankton : - ett sötvattensexperiment i oligotrofa och eutroa vatten

    Kandidat-uppsats, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Författare :Rebecka Möller; [2019]
    Nyckelord :Djurplankton; vägsalt; eutrofiering; förorening; näring.;

    Sammanfattning : Pollution or changes in abiotic factors can be stressful if they exceed a species tolerance level, it can for example prevent the species ability to reproduce and disperse. High nutrition- and salt levels may be limiting for species in higher concentrations and affects all species since indirect, interactive and additive effects of high nutrient or salt levels lead to changes in the community structures. LÄS MER

  5. 24. 2D Modelling of Phytoplankton Dynamics in Freshwater Lakes

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Avdelningen för beräkningsvetenskap

    Författare :Hugo Harlin; [2019]
    Nyckelord :Modelling; computational ecology; ecology; ecosystems; lake ecosystems; deterministic modelling; finite volume method; phytoplankton; plankton; lake; lakes;

    Sammanfattning : Phytoplankton are single celled organisms capable of phytosynthesis, and are present in all the major oceans and lakes in the world. Phytoplankton contribute to 50% of the total primary production on Earth, and are the dominating primary producer in most aquatic ecosystems. This thesis is based on the 1D deterministic model by Jäger et. al. LÄS MER

  7. 25. Lake biology as a function of catchment characteristics and water quality parameters – focus on phytoplankton

    Master-uppsats, SLU/Dept. of Aquatic Sciences and Assessment

    Författare :Jenny Näslund; [2019]
    Nyckelord :phytoplankton; total phosphorus; catchment; soil properties; land use; agriculture; water framework directive; ecological status;

    Sammanfattning : According to the EU Water Framework Directive, phytoplankton should be included for assessment of the ecological status of lakes. Phytoplankton respond rapidly to environmental changes and are a particularly good indicator of nutrient loads. LÄS MER