Impacts of Climate Change on Carbon and Nitrogen Cycles in Boreal Forest Ecosystems

摘要: It is well known that soil carbon stocks decrease considerably in response to warming, but experimental data have shown the loss of declines within decades apparent acclimation. An explanation such findings offered under theoretical framework ecosystem models this thesis. Simulations forest responses increased temperatures showed labile was reduced years after although structure and function decomposer organisms remained intact. CO2 also confirmed positive growth short term. The similar, however predicted be less than increase biomass. Nitrogen availability negative feedback mechanisms plant system were critical results, indicating nitrogen progressively limited response. Assumptions concerning decomposing changes are crucial interpretation above. Positive therefore implemented test consequences additions, allowing for improved efficiency when inorganic becomes available soil. Responses compared with results. moderate inputs slowly increasing loads long term revealed counteracting responses: resulted biomass as expected; appeared sense due decreased mineralisation. economic estimation net value sink capacity performed. given relation conservative estimates total values important flows natural capital – factors recreational or hydrological services omitted. suggested amount 3-50% Swedish forests.