Large-scale evaluation of biogeochemical functions in forest soilalong with environmental gradient

本项目在北海道北部、关东北部、近畿中部和九州南部进行研究，了解日本列岛森林土壤氮动态随气候梯度变化的模式和影响因素。增温增加了土壤微生物对氮的代谢，但在气候变化条件下，各立地土壤氮动态的各项特征相对保持不变。结果表明，大量的大气氮沉降和人类以往对森林资源的利用是影响不同立地间差异的重要因素。

This project was conducted in northern Hokkaido, northern Kanto, central Kinki and southern Kyusyu to understand the pattern and factors of the alteration in nitrogen dynamics of forest soil along with the climatic gradient in Japanese archipelago. While the warming increased soil microbial metabolisms of nitrogen, each specific characteristic of soil nitrogen dynamics in each site was relatively maintained even under the climate change. It was suggested that the much atmospheric nitrogen deposition and the previous human utilization of forest resources strongly influenced the differences among the sites.