Sökning: "marine subsidies"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden marine subsidies.

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

    Författare :Kajsa Mellbrand; Peter Hambäck; Lena Kautsky; David Wise; Stockholms universitet; []
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

  3. 2. Pesticides in coastal Tanzania : Management, policy and concerns for human health and the environment

    Författare :Nadja Stadlinger; Linda Kumblad; Anders Sjögren; Nils Kautsky; Kees Jansen; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; sub-Saharan Africa; agrochemicals; legislation; farmer education; hazards; subsidies; marin ekotoxikologi; Marine Ecotoxicology;

    Sammanfattning : This thesis is the first major assessment of pesticide management in Zanzibar, Tanzania. It underlines the risks for human health and the environment that are likely under the current pesticide management regime. LÄS MER

  4. 3. Beachcombers, landclubbers and able seemen : effects of marine subsidies on the roles of arthropod predators in coastal food webs

    Författare :Kajsa Mellbrand; Stockholms universitet; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  5. 4. Global trade, food production and ecosystem support : Making the interactions visible

    Författare :Lisa Deutsch; Carl Folke; Karin Limburg; Max Troell; David Waltner-Toews; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; global trade; food production; ecosystem support; resilience; agriculture; ecosystem performance; food consumption; ecological footprint; indicators; aquaculture; agricultural intensification; fishmeal; vulnerability; Sweden; animal feed; critical natural capital; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

    Sammanfattning : Modern food production is a complex, globalized system in which what we eat and how it is produced are increasingly disconnected. This thesis examines some of the ways in which global trade has changed the mix of inputs to food and feed, and how this affects food security and our perceptions of sustainability. LÄS MER

  7. 5. Food web dynamics in open and closed systems

    Författare :Johan Lövgren; Lennart Persson; Jonathan Chase; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ecology; allochtonous input; cross habitat foraging; donor control; heterogeneity within trophic level; compensation; food web; littoral; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

    Sammanfattning : This thesis is a summary of enclosure and microcosm experiments that aimed to study the impact of allochtonous subsidies on food web dynamics in a heterogeneous food web. In the enclosure studies, a three trophic level littoral food web was used. LÄS MER