Search for dissertations about: "Nitrogen fluxes"
Showing result 1 - 5 of 49 swedish dissertations containing the words Nitrogen fluxes.
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1. Nitrogen Losses from a Clay-rich Soil used for Cereal Production in south-western Sweden
Abstract : Addition of fertiliser nitrogen (N) in crop production increases yields and protein contents, but all is not taken up by the crop. Instead, some of the N is lost to air and waters, contributing e.g. to climate change, stratospheric ozone depletion, eutrophication and acidification. READ MORE
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2. Nitrogen land-sea fluxes in the Baltic Sea catchment : Empirical relationships and budgets
Abstract : In this thesis empirical relationships and modeling tools are used to describe the relationship between human activities and meso- and large scale riverine N fluxes from land to sea. On a large scale Paper I showed that by only having knowledge about human population size and runoff one can estimate the riverine export of DIN (r2= 0.76). READ MORE
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3. Free-Vehicle Benthic Lander Technology for the Study of Biogeochemical Processes in Marine Sediments
Abstract : Various sediment sampling and incubation techniques were used to characterize benthic biogeochemical processes important for an improved understanding of the oceanic carbon cycle. Recent flux data from the Arctic Siberian shelf are revealing differences (often by a factor of ten) between areas affected by the big Russian river outlets (high fluxes) and areas with low influence from land (low fluxes). READ MORE
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4. Nitrogen-cycling tracing methods : Case studies at cold-climate mine sites in northern Sweden
Abstract : High nitrogen effluents from mine sites is an environmental issue which has received relatively little attention historically. In recent years a number of studies have showed the environmental effects of high nitrogen discharge to natural water bodies, which include local eutrophication, high risk of acute reducing conditions and changed species composition in the receiving waters. READ MORE
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5. Microphytobenthos and Nitrogen Fluxes, with Special Emphasis on Dissolved Organic Nitrogen (DON)
Abstract : .... READ MORE