研究院アワー2010年12月10日Elisabeth J. Cooper :Winter challenges in Arctic terrestrial ecosystems

2010年12月10日（金）１４：００〜１６：００

場所：地球環境 D-201

要旨：

Arctic terrestrial ecosystems are characterized by short light summers and long dark winters with snow dominated landscapes. The winter period determines the physical framework for organisms, both in winter and during the following summer. Arctic terrestrial plant and soil ecology has traditionally been carried out in summertime, when the snow has melted and the organisms are more easily accessible. However, arctic ecosystems are no longer considered dormant during winter. Recent studies show that winter ecosystem respiration is an important contributor to the annual CO₂ flux in the Arctic, and that changes in snowfall as well as temperature in winter can contribute to positive feedback of rising CO₂ concentrations. This paper will review recent studies of arctic terrestrial ecosystems during winter, with specific emphasis on plant and soil responses to changes in winter climate.