Search for dissertations about: "Ann-Kristin Bergström"
Showing result 1 - 5 of 8 swedish dissertations containing the words Ann-Kristin Bergström.
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1. Effects of inorganic nitrogen and organic carbon on pelagic food webs in boreal lakes
Abstract : Anthropogenic activities are increasing inorganic nitrogen (N) loadings to lakes in the northern hemisphere. In many boreal lakes phytoplankton are N limited, wherefore enhanced N input may affect the productivity of pelagic food webs. READ MORE
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2. Productivity and carbon transfer in pelagic food webs in response to carbon, nutrients and light
Abstract : Some of the major problems we face today are human induced changes to the nitrogen (N), phosphorus (P) and carbon (C) cycles. Predicted increases in rainfall and temperature due to climate change, may also increase dissolved organic matter (DOM) inflows to freshwater ecosystems in the boreal zone. READ MORE
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3. Water Quality in Swedish Lakes and Watercourses : Modeling the Intra-Annual Variability
Abstract : Water quality is of great importance for ecosystems and society. This thesis characterized and modeled the variation in several key constituents of Swedish surface waters, with particular consideration given to intra-annual variability and sensitivity to climate change. READ MORE
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4. Causes and consequences of Gonyostomum semen blooms
Abstract : Aquatic ecosystems provide essential ecosystem services, but are also highly vulnerable to global change. Climate change, eutrophication and browning, for example, collectively drive the increase of harmful algal blooms in freshwaters. READ MORE
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5. The role of nutrients for stream ecosystem function in Arctic landscapes : drivers of productivity under environmental change
Abstract : Arctic and sub-Arctic freshwaters are currently experiencing substantial ecosystem changes due to the effects of global warming. Global warming effects on these freshwaters include increasing water temperatures, altered hydrological patterns, shifts in riparian vegetation and changes in the export of nutrients and carbon from soils. READ MORE