Sökning: "community dynamics"

Visar resultat 16 - 20 av 246 avhandlingar innehållade orden community dynamics.

  1. 16. Species interactions govern evolutionary and ecological effects of population harvesting

    Författare :Anna Gårdmark; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; population harvesting; species interactions; ecological community; Ekologi; Ecology; competition; predation; fisheries; spatial dynamics; maturation; population dynamics; life-history evolution; adaptation;

    Sammanfattning : Harvesting changes population abundance and can affect adaptation of several life-history traits. Harvesting can also have indirect effects ? effects on non-target species and secondary effects on target species ? because interactions between species in a community determine the relevant ecological and evolutionary feedback environment. LÄS MER

  2. 17. Drivers of Population Dynamics in Bacterioplankton : Spotlight on Alphaproteobacteria and its dominant SAR11 Lineage

    Författare :Friederike Heinrich; Stefan Bertilsson; Alexander Eiler; David Kirchman; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; bacterial community dynamics; Alphaproteobacteria; SAR11; LD12; Southern Ocean; lakes; Biology with specialization in Limnology; Biologi med inriktning mot limnologi;

    Sammanfattning : Bacteria are mediators of biogeochemical cycles and are in this way vital for maintaining life on earth. Their distribution, abundance and functioning are driven by environmental heterogeneity and dynamic change in abiotic and biotic factors. LÄS MER

  3. 18. Fingerprints of planktivory : paleolimnological evidence of past fish community structure and dynamics

    Författare :Emma Åhlén; Marko Reinikainen; Tom Korsman; Pär Byström; Timo Kairesalo; Umeå universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; planktivory; foraging efficiency; cladoceran remains; Bosmina; planktivore community capacity; PCC; Ceriodaphnia; reserrection; zooekologi; Animal Ecology;

    Sammanfattning : Planktivorous fish affect the species composition, size and morphology of their zooplankton prey by size selective predation. Remains of cladocerans are deposited in the lake sediments and this microfossil community hence reflects the historical changes in the planktivore fish community. LÄS MER

  4. 19. Seagrass Meadows. Community Ecology and Habitat Dynamics

    Författare :Martin Gullström; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : .... LÄS MER

  5. 20. In Search of 'Community' in Zimbabwe's Fast Track Resettlement Area of Mazowe District

    Författare :Mabel Hungwe; Institutionen för kulturgeografi och ekonomisk geografi; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; COMMUNITY; LAND REFORM; EXIT; LOYALTY; NEGLECT; VOICE; INNOVATION; UNHU; UBUNTU; MAZOWE; ZIMBABWE;

    Sammanfattning : The thesis discusses community development in fast track resettlement areas of Zimbabwe. The land reform programme designated as the Third Revolution (Chimurenga) or fast track land reform was launched in 2000. This programme saw 12 million hectares of farming land being taken over by the state for resettlement. LÄS MER