大気から森林・海洋生態系への反応性窒素成分の沈着

抄録

Nitrogen is an essential element for living organisms, originally derived from the atmosphere, and circulated in ecosystems. Nitrogen is a limiting factor for net primary production in ecosystems, and organisms acquire nitrogen through deposition of reactive nitrogen from the atmosphere and nitrogen fixation. Nitrogen oxides and ammonia released into the atmosphere by human activities can be deposited in excess in forests and oceans, affecting ecosystems. This review focuses on nitrogen deposition in forest and marine ecosystems and describes the status and issues in measuring and estimating wet and dry deposition. In addition, this paper describes how environmental and social transition caused by climate change can affect nitrogen deposition, and what kind of future research is necessary under such circumstances.