Search for dissertations about: "Aquatic ecosystems of insects"

Showing result 1 - 5 of 12 swedish dissertations containing the words Aquatic ecosystems of insects.

  2. 1. Metals take flight : Transport and effects across ecosystems

    Author : Johan Lidman; A. M. M. Berglund; Micael Jonsson; Christian Bigler; Brendan Mckie; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Metals; aquatic subsidies; passerines; aquatic insects; environmental science; miljövetenskap; ekotoxikologi; Ecotoxicology;

    Abstract : Metal contamination can have severe toxic effects in the ecosystems, resulting in loss of biodiversity, reduced abundance of organisms, and loss of ecosystem services. Traditionally, aquatic ecosystems have been regarded as a sink of metal contamination. READ MORE

  4. 2. The Spider and the Sea : Effects of marine subsidies on the role of spiders in terrestrial food webs

    Author : Kajsa Mellbrand; Peter Hambäck; Lena Kautsky; David Wise; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; marine subsidies; food webs; stable isotopes; shore ecosystems; predators; spiders; Pardosa; algae; emerging insects; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi; Plant Ecology; växtekologi;

    Abstract : The purpose of this study was to identify if terrestrial arthropod predators on Baltic Sea shores vary in their use of marine versus terrestrial food items, and to construct a bottom-up food web for Baltic Sea shores. The inflow of marine nutrients in the area consists mainly of marine algal detritus and emerging aquatic insects (e.g. READ MORE

  5. 3. Climate change impacts on aquatic consumer communities

    Author : Shuntaro Koizumi; Pär Byström; Ryan Sponseller; Jonathan Shurin; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Climate change; warming; browning; aquatic consumers; zooplankton; benthic insects; fish; ecosystem experiment; environmental science; miljövetenskap;

    Abstract : Climate change represents a serious threat to aquatic ecosystems, with an increase in lake temperatures already observed that is expected to continue in the near future. Aside from the direct effects of warming, climate change is also partially responsible for the browning of lakes. READ MORE

  6. 4. Bacterial Degradation and Use of Chitin in Aquatic Habitats

    Author : Sara Beier; Stefan Bertilsson; Ian Head; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Chitin; organic matter degradation; microbial ecology; functional guild; Biology; Biologi;

    Abstract : Chitin belongs to the most abundant biopolymers on earth where it has an important role as a structural element in crustaceans, insects, fungi and some phytoplankton. Missing evidence for long-term accumulation of chitin in nature implies fast turnover and as chitin is composed of aminosugar subunits it holds central roles in both carbon and nitrogen cycles. READ MORE

  7. 5. What are the effects of natural versus human-caused acidity on stream species diversity and ecosystem functioning?

    Author : Zlatko Petrin; Björn Malmqvist; Steve J. Ormerod; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; acid rain; aquatic insects; biodiversity; ecosystem function; Biology; Biologi;

    Abstract : Human activities have caused acidification of freshwater systems on a large scale resulting in reduced species diversity and ecological functioning in many lakes and streams. However, many naturally acidic freshwater systems have also been found, for instance in northern Sweden. READ MORE