Search for dissertations about: "periphyton"

Showing result 11 - 15 of 17 swedish dissertations containing the word periphyton.

  1. 11. The different roles of crayfish in benthic food webs

    University dissertation from Department of Ecology, Lund University

    Author : Patrik Stenroth; Lunds universitet.; Lund University.; [2005]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Marinbiologi; limnologi; aquatic ecology; marine biology; food chain length; stable isotopes; environmental gradients; diet; crayfish; akvatisk ekologi; limnology; Hydrobiology;

    Abstract : Popular Abstract in Swedish Vad pysslar kräftorna med? Kräftor äter allt! Jag har visat att kräftor äter gamla blad från träd, alger, vattenväxter och även smådjur som till exempel sländlarver, iglar och sövattensgråsuggor. Dessa olika typer av mat har olika näringsvärde. READ MORE

  2. 12. Effects of morphometric isolation and vegetation on the macroinvertebrate community in shallow Baltic Sea land-uplift bays

    University dissertation from Stockholm : Department of Botany, Stockholm university

    Author : Joakim Hansen; Stockholms universitet.; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; lagoons; macrofauna; macrophytes; hydrophytes; charophytes; ecological succession; structural complexity; habitat complexity; habitat selection; species composition; biodiversity; stable isotopes; food web; NATURAL SCIENCES Biology Terrestrial; freshwater and marine ecology; NATURVETENSKAP Biologi Terrestrisk; limnisk och marin ekologi; Plant Ecology; växtekologi;

    Abstract : Shallow sheltered Baltic Sea bays are ecologically important habitats that harbour a unique vegetation community and constitute vital reproduction areas for many coastal fish species. Knowledge about the invertebrate community in these bays is, however, limited. READ MORE

  3. 13. The importance of predation in benthic stream communities

    University dissertation from Limnology, Department of Ecology, Lund University

    Author : Jonas Dahl; Lunds universitet.; Lund University.; [1998]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Ekologi; Ecology; invertebrate predators; vertebrate predators; Predation; streams;

    Abstract : There has been considerable debate whether or not predators has any significant effects on prey densities in streams. This thesis examines the importance of predation in stream communities. I have conducted both field and laboratory studies where I have studied how both vertebrate and invertebrate predators affects benthic prey. READ MORE

  4. 14. Forest-stream linkages Experimental studies of foraging and growth of brown trout (Salmo trutta L)

    University dissertation from Fakulteten för samhälls- och livsvetenskaper

    Author : Pär Gustafsson; Karlstads universitet.; [2008]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES Biology; NATURVETENSKAP Biologi; Biology; Biologi; Brown trout; diet; growth; riparian zone; forest-stream linkages; terrestrial invertebrates; light; primary production; functional response; foraging;

    Abstract : Riparian vegetation along streams and rivers affects the aquatic community in numerous ways and often operates as a link for energy flux between forest and streams. The studies presented in this licentiate thesis focus on light and terrestrial invertebrates, two factors influenced by riparian zone structure, which potentially affect stream ecosystems and thus also brown trout (Salmo trutta). READ MORE

  5. 15. Structuring factors for macroinvertebrate communities and the importance for ecosystem processing

    University dissertation from Fakulteten för samhälls- och livsvetenskaper

    Author : Pia Hertonsson; Lunds universitet.; Lund University.; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; ephemeroptera; competition; Predation risk; brownification; invasive sp.; decomposition; grazing; growth; gastropoda; mortality; amphipoda; isopoda;

    Abstract : Aquatic macroinvertebrates play important roles in our ecosystems and are essential for the ecosystem processing. An improved knowledge of structuring factors, such as competition and predation, and the way in which they operates in the macroinvertebrate community is crucial for our understanding of not only the macroinvertebrates but also the ecosystem in general. READ MORE