globalchange  > 气候变化与战略
DOI: 10.1111/gcb.14847
论文题名:
Terrestrial N2O emissions and related functional genes under climate change: A global meta-analysis
作者: Li L.; Zheng Z.; Wang W.; Biederman J.A.; Xu X.; Ran Q.; Qian R.; Xu C.; Zhang B.; Wang F.; Zhou S.; Cui L.; Che R.; Hao Y.; Cui X.; Xu Z.; Wang Y.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2020
卷: 26, 期:2
语种: 英语
英文关键词: drought ; nitrous oxide ; precipitation ; soil moisture ; soil N cycle ; warming
Scopus关键词: climate change ; drought ; emission ; meta-analysis ; nitrogen cycle ; nitrous oxide ; precipitation assessment ; soil moisture ; soil nitrogen ; terrestrial ecosystem ; warming ; Archaea ; Bacteria (microorganisms)
英文摘要: Nitrous oxide (N2O) emissions from soil contribute to global warming and are in turn substantially affected by climate change. However, climate change impacts on N2O production across terrestrial ecosystems remain poorly understood. Here, we synthesized 46 published studies of N2O fluxes and relevant soil functional genes (SFGs, that is, archaeal amoA, bacterial amoA, nosZ, narG, nirK and nirS) to assess their responses to increased temperature, increased or decreased precipitation amounts, and prolonged drought (no change in total precipitation but increase in precipitation intervals) in terrestrial ecosystem (i.e. grasslands, forests, shrublands, tundra and croplands). Across the data set, temperature increased N2O emissions by 33%. However, the effects were highly variable across biomes, with strongest temperature responses in shrublands, variable responses in forests and negative responses in tundra. The warming methods employed also influenced the effects of temperature on N2O emissions (most effectively induced by open-top chambers). Whole-day or whole-year warming treatment significantly enhanced N2O emissions, but daytime, nighttime or short-season warming did not have significant effects. Regardless of biome, treatment method and season, increased precipitation promoted N2O emission by an average of 55%, while decreased precipitation suppressed N2O emission by 31%, predominantly driven by changes in soil moisture. The effect size of precipitation changes on nirS and nosZ showed a U-shape relationship with soil moisture; further insight into biotic mechanisms underlying N2O emission response to climate change remain limited by data availability, underlying a need for studies that report SFG. Our findings indicate that climate change substantially affects N2O emission and highlights the urgent need to incorporate this strong feedback into most climate models for convincing projection of future climate change. © 2019 John Wiley & Sons Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159404
Appears in Collections:气候变化与战略

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作者单位: College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China; Environmental Futures Research Institute, School of Environment and Science, Griffith University, Brisbane, QLD, Australia; Department of Environment and Science, Brisbane, QLD, Australia; School of Agriculture and Food Sciences, University of Queensland, Brisbane, QLD, Australia; Southwest Watershed Research Center, Agricultural Research Service, Tucson, AZ, United States; Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences (CAS), Beijing, China; Institute of International Rivers and Eco-security, Yunnan University, Kunming, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences (CAS), Beijing, China

Recommended Citation:
Li L.,Zheng Z.,Wang W.,et al. Terrestrial N2O emissions and related functional genes under climate change: A global meta-analysis[J]. Global Change Biology,2020-01-01,26(2)
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