Unravelling the Biogeochemical Cycles of Carbon and Nutrients in Forest Ecosystems:Innovative Approaches with Advanced Stable Isotope and NMR Techniques as well as Soil Chemical and Physical Methods

摘要

Long-term impacts of global climate change (GCC) and local forest management on important biogeochemical cycles of carbon (C) and nutrient cycling in the soil-plant ecosystems are complex and difficult to assess, particularly under gradually and continuously rising atmospheric carbon dixoide concentration [CO2] and warming in the real world with multiple limiting factors. In this presentation, we highlight the recent developments and applications of advanced stable isotope, nuclear magnetic resonance (NMR) and bio-molecular techniques, in an integrated approach with innovative rhizosphere and tree ring methods, for improving our understanding and management of above- and below-ground C and nutrient cycling processes in forest ecosystems, particularly in response to GCC and local management practices as well as mitigation/adaptation strategies. The opportunities and limitations of these techniques for investigating C and nutrient cycling processes in forest ecosystems are discussed, in the context of both short- and long-term impacts on the above- and belowground processes. Improved understanding and knowledge of environmental fingerprints of the biogeochemical cycles embedded in tree rings can be effectively used to account for long-term forest productivity and C stocks at local, regional and global scale in response to the future GCC and management options.