These authors contributed equally to this work.
Article first published online: 4 APR 2013
© 2013 Chinese Academy of Science. New Phytologist © 2013 New Phytologist Trust
Volume 199, Issue 2, pages 441–451, July 2013
How to Cite
Bai, E., Li, S., Xu, W., Li, W., Dai, W. and Jiang, P. (2013), A meta-analysis of experimental warming effects on terrestrial nitrogen pools and dynamics. New Phytologist, 199: 441–451. doi: 10.1111/nph.12252
- Issue published online: 19 JUN 2013
- Article first published online: 4 APR 2013
- Manuscript Accepted: 1 MAR 2013
- Manuscript Received: 8 JAN 2013
- Major State Basic Research Development Program of China. Grant Number: 2011CB403202
- NSFC. Grant Number: 31100326
- Key Program of the Chinese Academy of Sciences Project. Grant Number: KZCX2-YWBR-20
- increased temperature;
- N cycling processes;
- nitrogen fluxes
- Global warming may have profound effects on terrestrial ecosystems. However, a comprehensive evaluation of the effects of warming on ecosystem nitrogen (N) pools and dynamics is not available.
- Here, we compiled data of 528 observations from 51 papers and carried out a meta-analysis of experimental warming effects on 13 variables related to terrestrial N pools and dynamics.
- We found that, on average, net N mineralization and net nitrification rate were increased by 52.2 and 32.2%, respectively, under experimental warming treatment. N pools were also increased by warming, although the magnitude of this increase was less than that of N fluxes. Soil microbial N and N immobilization were not changed by warming, probably because microbes are limited by carbon sources. Grassland and shrubland/heathland were less responsive to warming than forest, probably because the reduction of soil moisture by warming offset the temperature effect in these areas. Soil heating cable and all-day treatment appeared to be the most effective method on N cycling among all treatment methods.
- Results of this meta-analysis are useful for better understanding the response of N cycling to global warming and the underlying mechanism of warming effects on plants and ecosystem functions.