Essays about: "phytoplankton"

Showing result 26 - 30 of 41 essays containing the word phytoplankton.

  1. 26. Biodiversity of Organic-Walled Eukaryotic Microfossils from the Tonian Visingsö Group, Sweden

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Corentin Loron; [2016]
    Keywords : Organic-walled microfossils; Tonian; cyst; green algae; eukaryote; Visingsö Group; Mikrofossil med organiska cellväggar; tonian; cysta; grönalger; eukaryot; Visingsö gruppen;

    Abstract : The diversification of unicellular, auto- and heterotrophic protists and the appearance of multicellular microorganisms is recorded in numerous Tonian age successions worldwide, including the Visingsö Group in southern Sweden. The Tonian Period (1000-720 Ma) was a time of changes in the marine environments with increasing oxygenation and a high input of mineral nutrients from the weathering continental margins to shallow shelves, where marine life thrived. READ MORE

  3. 27. Sources of organic carbon fueling carbon emissions from tropical reservoirs

    University essay from

    Author : Gabriella Villamor Saucedo; [2016]
    Keywords : tropical reservoirs; decomposition; autochthonous carbon; allochthonous carbon; tropical macrophytes; methanogenesis; tropiska vattenkraftsmagasin; metangasproduktion; autoktont OM; alloktont OM; tropiska makrofyter;

    Abstract : For a sustainable energy supply, it is of importance to be aware about the environmental impacts from the different energy sources. Hydroelectric reservoirs in tropical areas have been found to emit more greenhouse gases (GHG) than reservoirs from boreal regions. READ MORE

  4. 28. Response of Phytoplankton to Climatic Changes during the Eocene-Oligocene Transition at the North Atlantic ODP Site 612

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Lucía Rivero Cuesta; [2015]
    Keywords : Phytoplankton; abundance; coccoliths; silica; Eocene; Oligocene; Fytoplankton; antal; coccoliter; kisel; Eocen; Oligocen; Fitoplancton; abundancia; cocolitos; sílice; Eoceno; Oligoceno;

    Abstract : The development of modern glacial climates occurred during the Eocene-Oligocene transition (34 to 35.5 Ma) when a decrease of atmospheric CO2 led to a global temperature fall. The ocean was deeply affected, both in the surface and the deep-sea, suffering a strong reorganization including currents and phytoplankton distribution. READ MORE

  5. 29. Humic matter and phytoplankton nutrient limitation in a changing environment

    University essay from SLU/Dept. of Aquatic Sciences and Assessment

    Author : Valerie Wentzky; [2014]
    Keywords : phytoplankton; dissolved organic carbon; iron; phosphorus; nutrient limitation; nutrient availability; Lake Mälaren;

    Abstract : Climate change leads to increased inputs of terrestrial dissolved organic carbon (DOC) and associated nutrients to freshwaters, potentially affecting the risk for eutrophication. While the effect of higher DOC concentrations on primary productivity (PP) due to light attenuation and increased competition by bacteria is rather well studied, the effect of DOC on PP due to effects on nutrient availability is still unclear. READ MORE

  6. 30. Evaluation of modeling ecosystem seasonality in the University of Victoria Earth System Climate Model

    University essay from Lunds universitet/Examensarbeten i biologi

    Author : Annika Eisele; [2013]
    Keywords : Biology and Life Sciences;

    Abstract : Abstract Investigating climate model ability to simulate ecosystem seasonality, for instance causes and dynamics of phytoplankton blooms in the North Atlantic, is of major importance, because interannual and seasonal variations in bloom timing, duration and intensity caused by anthropogenic induced global climate change, can lead to species shifts and alterations in the trophic food web and biogeochemical cycles, which otherwise may remain undetected on an annual scale. The seasonal variability of the North Atlantic spring bloom is highly related to surface pCO2 (Takahashi et al. READ MORE