Biogeochemistry

Biogeochemical processes and environmental change impacts in northern terrestrial and aquatic ecosystems

Our research activities focus on biogeochemical processes in terrestrial and aquatic ecosystems. Interactions between abiotic factors and biotic processes in boreal and arctic soils, waters and sediments are of particular interest. Terrestrial projects focus on the cycling of nutrients (carbon, nitrogen, phosphorus and sulphur) and contaminants (Hg, Pb and persistent organic pollutants) in soils. In the aquatic projects we study; 1) effects of allochthonous organic matter on production and respiration in lakes; 2) emission of carbon dioxide and methane from lakes and streams; 3) the influence of climate and nitrogen deposition on lake ecosystem function. An important part is to integrate research on terrestrial and aquatic ecosystems in order to understand the function of northern ecosystems and their response to environmental change. Research is carried out in cooperation with different Swedish and international universities and the Climate Impacts Research Centre (CIRC) in Abisko. The research includes comparative studies across climatic gradients in northern Sweden (boreal-alpine/arctic) as well as experimental studies in laboratory and field.

Research projects

Taking the pulse of Swedish rivers: using metabolism to monitor ecosystem responses to environmental changeCross-boundary transfer of contaminants and ecological effectsGlobal Nitrogen Enrichment Experiment (AGNEE)Climate impact on sources and sinks of greenhouse gases in high-latitude lakesClimate change induced regime shifts in Northern lake ecosystemsMonitoring and management of Arctic lakes in a changing climateClimate impact on the carbon emission and export from Siberian inland waters (SIWA)Quantifying cryogenic soil-mixing in the tundra soil and its role for the long-term carbon cycling in the arcticTracing the origin of dissolved organic carbon using stable sulphur isotopesThe aquatic conduit in taiga and tundra eco-regions- a sink or source for atmospheric carbonEffects of nitrogen deposition on nutrient limitation and phytoplankton productivity in lakes Above- and belowground interactions in tundraPhosphorus dynamics and speciation in tundra and taigaEffects of forestry on greenhouse gas emissions from boreal inland watersThe Contamination Ecology Think Tank research facility


Page Editor: Elisabet Carlborg

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