Search for dissertations about: "Fish community composition"
Showing result 1 - 5 of 35 swedish dissertations containing the words Fish community composition.
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1. Paleolimnological reconstructions of fish population changes in acidified lakes
Abstract : This thesis deals with the potential of using subfossil Chaoborus spp. and Daphnia spp. remains preserved in lake sediments to reveal past fish community alterations related to progressive acidification. READ MORE
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2. Fish community patterns in Tanzanian mangrove creeks
Abstract : Human beings have exploited the biota of mangrove systems for centuries and fish continue to be one of the main products harvested from these habitats. The assumption of mangroves functioning as recruitment areas for juvenile fish from neighbouring habitats such as seagrass beds and coral reefs is a common argument for conservation and management of mangrove ecosystems. READ MORE
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3. Macroalgal community dynamics on coral reefs : Implications for management
Abstract : Although rather inconspicuous on healthy coral reefs, macroalgae form the basis of coral food webs. Today, macroalgae are generally increasing and many reefs undergo transitions from coral to macroalgal dominance resulting from e.g. enhanced nutrient loading or increased fishing. READ MORE
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4. Biological Diversity of Fish and Bacteria in Space and Time
Abstract : Biological diversity is controlled by an array of factors and processes all active at different spatial and temporal scales. Regional factors control what species are available to occur locally, whereas the local factors determine what species are actually capable of colonizing the locality. READ MORE
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5. Fingerprints of planktivory : paleolimnological evidence of past fish community structure and dynamics
Abstract : 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. READ MORE