Response of Greenhouse Gas Emissions to Nitrogen Deposition in Terrestrial Ecosystem

Nitrogen deposition input changes the carbon and nitrogen cycle rate significantly in terrestrial ecosystem, and then affects the structure and function of entire ecosystem. The elevated atmospheric concentration of greenhouse gases is one of the most important causes of global warming and has become an indisputable fact. Terrestrial ecosystem is the important source and sink of greenhouse gases, and plays an extremely important role in global warming. Nitrogen deposition can affect the fluxes of greenhouse gases from terrestrial ecosystem. The responses of greenhouse gases emissions to nitrogen deposition in forest ecosystem, farmland ecosystem, grassland ecosystem and wetland ecosystem of typical terrestrial ecosystem are reviewed in this paper. As a result of the differences of ecosystem types, climate, vegetational community and soil N status, the effect of nitrogen deposition on main greenhouse gases flux emissions present in three aspects: suppression, promotion and non-significant in terrestrial ecosystem.