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Nitrogen deposition and its ecological impact in China: An overview |
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| Authors: | Xuejun Liu Lei DuanJiangming Mo Enzai DuJianlin Shen Xiankai LuYing Zhang Xiaobing ZhouChune He Fusuo Zhang |
| Institution: | a College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China b Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China c South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China d College of Urban and Environmental Sciences, Peking University, Beijing 100871, China e Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China f Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences, Beijing 100101, China |
| Abstract: | Nitrogen (N) deposition is an important component in the global N cycle that has induced large impacts on the health and services of terrestrial and aquatic ecosystems worldwide. Anthropogenic reactive N (Nr) emissions to the atmosphere have increased dramatically in China due to rapid agricultural, industrial and urban development. Therefore increasing N deposition in China and its ecological impacts are of great concern since the 1980s. This paper synthesizes the data from various published papers to assess the status of the anthropogenic Nr emissions and N deposition as well as their impacts on different ecosystems, including empirical critical loads for different ecosystems. Research challenges and policy implications on atmospheric N pollution and deposition are also discussed. China urgently needs to establish national networks for N deposition monitoring and cross-site N addition experiments in grasslands, forests and aquatic ecosystems. Critical loads and modeling tools will be further used in Nr regulation. |
| Keywords: | Atmospheric pollution N emission and deposition Critical loads Ecological impact |
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