Sökning: "zooplankton"

Visar resultat 1 - 5 av 84 avhandlingar innehållade ordet zooplankton.

  1. 1. Zooplankton response to cyanotoxins

    Detta är en avhandling från Limnology, Department of Ecology, Lund University

    Författare :Susanne Gustafsson; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Naturvetenskap; Natural science; cyanotoxins; maternal effects; algal toxins; zooplankton; tolerance; cyanobacteria;

    Sammanfattning : Mass development of cyanobacteria (blue-green algae) is common in many lakes and coastal waters worldwide as a result of an increased nutrient loading. These blooms of cyanobacteria are undesirable for several reasons; thick mats of algae and unpleasant odour reduces the recreational values, bad taste reduces the quality of drinking water and the potent toxins produced by some species of cyanobacteria endanger human health. LÄS MER

  2. 2. Non-indigenous zooplankton the role of predatory cladocerans and of copepods in trophic dynamics

    Detta är en avhandling från Stockholm : Systemekologiska institutionen

    Författare :Marc Andersen Borg; Fredrik Wulff; Markku Viitasalo; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Acartia tonsa; Bythotrephes longimanus; Cercopagis pengoi; egg production; fitness; food web changes; ingestion rates; invasive species; metabolic balance; mortality; non-indigenous zooplankton; predation impact; salinity tolerance; stable isotopes; NATURAL SCIENCES Biology Terrestrial; freshwater and marine ecology Marine ecology; NATURVETENSKAP Biologi Terrestisk; limnisk och marin ekologi Marin ekologi; marin ekologi; Marine Ecology;

    Sammanfattning : Human-mediated introductions of non-indigenous species now threaten to homogenize the biota of the Globe, causing huge economic and ecological damage. This thesis studies the ecological role of 3 invasive planktonic crustaceans, the omnivorous copepod Acartia tonsa (western Atlantic and Indo-Pacific) and the predatory cladocerans, Cercopagispengoi (Ponto-Caspian) and Bythotrephes longimanus (Eurasian). LÄS MER

  3. 3. Food Quality for Zooplankton in Humic Lakes

    Detta är en avhandling från Lund University, Ecology Department/ Limnology

    Författare :Kelly Gutseit; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; limnology; Hydrobiology; marine biology; Clear water lakes; Plankton; Seston; Elements; Fatty acids; Humic lakes; Food quality; Zooplankton; limnologi; akvatisk ekologi; aquatic ecology; Marinbiologi;

    Sammanfattning : Food quality affects growth, reproduction and community structure of zooplankton, and has implications for nutrient cycling and the transfer of energy and matter in aquatic food chains. While the issue of food quality in clear water lakes has received great recent attention, studies on food quality for zooplankton in humic lakes are scarce. LÄS MER

  4. 4. On the ecology and productivity of zooplankton in the northern Baltic

    Detta är en avhandling från Stockholm : Stockholm University

    Författare :Paula Kankaala; [1984]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Zooplankton; northern Baltic; Zooplankton; Plankton; ekologi; Östersjön;

    Sammanfattning : .... LÄS MER

  5. 5. Spring dynamics in shallow lakes: the role of plankton, fish and macrophytes in a changing climate

    Detta är en avhandling från Stockholm : Stockholm University

    Författare :Alice Nicolle; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; zooplankton; spring; 0 fish; macrophytes; phenology; climate change; shallow lakes;

    Sammanfattning : Shallow lakes such as Lake Krankesjön are characterized by their extended littoral zones, usually covered by submersed and emergent vegetation. In paper 1, I investigated the relationship between turbidity and macrophyte growth (Chara spp. LÄS MER