Sökning: "phytoplankton"

Visar resultat 6 - 10 av 54 uppsatser innehållade ordet phytoplankton.

  1. 6. Effekter av salthalter och ljusexponering på zooplanktonpopulationer

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

    Författare :Arielle Lindell; [2022]
    Nyckelord :Zooplankton; salinity; salinization; eutrophication;

    Sammanfattning : Abstract Eutrophication and salinization are both major threats to lake ecosystems and the contaminants can alter the structure of freshwater lake ecosystems, resulting in a loss of biodiversity and ecosystem services. Zooplankton and phytoplankton are key components in all aquatic ecosystems as they maintain a healthy quality of the water and they are also an important part of the food chain. LÄS MER

  3. 7. Aluminiumbehandling som sjörestaureringsåtgärd i Stora och Lilla Ullfjärden

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Luft-, vatten- och landskapslära

    Författare :Maja Sellergren; [2022]
    Nyckelord :Aluminum treatment; lake restoration; algal blooms; Bayesian decision analysis; Aluminiumbehandling; sjörestaurering; algblomning; bayesiansk beslutsanalys;

    Sammanfattning : Stora och Lilla Ullfjärden är två sjöar som tillhör den innersta delen av en vik i Mälaren. Här har den höga fosforbelastningen länge varit ett problem då den leder till kraftig algblomning varje år. LÄS MER

  4. 8. Methane Sulphonic Acid in East Antarctic Coastal Firn and Ice Cores and Its Relationship with Chlorophyll-a and Sea Ice Extent in the Southern Ocean

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Emma Nilsson; [2022]
    Nyckelord :methane sulphonic acid; firn cores; sea ice proxy; marine primary productivity; Fimbul Ice Shelf; Dronning Maud Land; metansulfonsyra; firnkärnor; havsis-proxy; marin primärproduktion; Fimbulisen; Dronning Maud Land;

    Sammanfattning : The seasonal retreat of sea ice in the austral spring and summer around Antarctica has a significant effect on phytoplankton activity, mainly due to light availability, meltwater input of dissolved iron, and surface water stratification. Phytoplankton produce dimethylsulfoniopropionate, the precursor to the climate-cooling gas dimethyl sulphide, which is ventilated to the atmosphere and oxidised to methane sulphonic acid (MSA). LÄS MER

  5. 9. How brownification and eutrophication effects a drinking water source – with Lake Bolmen, Sweden, in focus

    Master-uppsats, Lunds universitet/Miljövetenskaplig utbildning; Lunds universitet/Centrum för miljö- och klimatvetenskap (CEC)

    Författare :Stina Stomberg; [2022]
    Nyckelord :brownification; eutrophication effects; drinking water; phytoplankton; Lake Bolmen; mesocosm; Earth and Environmental Sciences;

    Sammanfattning : The ongoing human impact in form of deforestation, urbanization and intense agriculture is affecting the natural hydrology and our freshwater lakes negatively. Both eutrophication and brownification has seen to increase with the ongoing environmental change which can potentially have large impact on our freshwater ecosystems. LÄS MER

  7. 10. Top - down control: parasitism and predation on Gonyostomum semen in Swedish brown water lakes

    Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Ingrid Bergman; [2022]
    Nyckelord :limnology; phytoplankton; top-down control;

    Sammanfattning : Gonyostomum semen is a raphidophyte microalgae that can be found in brown water lakes all over Sweden. The species forms substantial summer blooms that can completely dominate the phytoplankton community, largely due to its limited grazing pressure. To test whether parasites control the abundance of G. LÄS MER