Journal
ENVIRONMENTAL POLLUTION
Volume 206, Issue -, Pages 352-360Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2015.07.033
Keywords
Nitrogen deposition; Carbon cycle; Global change; N-rich and N-limited ecosystems; Meta-analysis; China
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Funding
- National Basic Research Program of China [2010CB833502]
- National Natural Science Foundation of China [41473112]
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Nitrogen (N) deposition in China has increased greatly, but the general impact of elevated N deposition on carbon (C) dynamics in Chinese terrestrial ecosystems is not well documented. In this study we used a meta-analysis method to compile 88 studies on the effects of N deposition C cycling on Chinese terrestrial ecosystems. Our results showed that N addition did not change soil C pools but increased above-ground plant C pool. A large decrease in below-ground plant C pool was observed. Our result also showed that the impacts of N addition on ecosystem C dynamics depend on ecosystem type and rate of N addition. Overall, our findings suggest that 1) decreased below-ground plant C pool may limit long-term soil C sequestration; and 2) it is better to treat N-rich and N-limited ecosystems differently in modeling effects of N deposition on ecosystem C cycle. (C) 2015 Elsevier Ltd. All rights reserved.
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