DOI: 10.1111/gcb.13156
论文题名: A cross-biome synthesis of soil respiration and its determinants under simulated precipitation changes
作者: Liu L. ; Wang X. ; Lajeunesse M.J. ; Miao G. ; Piao S. ; Wan S. ; Wu Y. ; Wang Z. ; Yang S. ; Li P. ; Deng M.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2016
卷: 22, 期: 4 起始页码: 1394
结束页码: 1405
语种: 英语
英文关键词: Apparent Q10
; Aridity index
; Drought
; Meta-analysis
; Precipitation regime
; Soil moisture
; Soil temperature
; Wet
Scopus关键词: aridity
; biome
; carbon flux
; climate change
; climate effect
; drought
; precipitation assessment
; soil moisture
; soil respiration
; soil temperature
; rain
; soil
; water
; chemistry
; climate change
; drought
; microbiology
; soil
; temperature
; Climate Change
; Droughts
; Rain
; Soil
; Soil Microbiology
; Temperature
; Water
英文摘要: Soil respiration (Rs) is the second-largest terrestrial carbon (C) flux. Although Rs has been extensively studied across a broad range of biomes, there is surprisingly little consensus on how the spatiotemporal patterns of Rs will be altered in a warming climate with changing precipitation regimes. Here, we present a global synthesis Rs data from studies that have manipulated precipitation in the field by collating studies from 113 increased precipitation treatments, 91 decreased precipitation treatments, and 14 prolonged drought treatments. Our meta-analysis indicated that when the increased precipitation treatments were normalized to 28% above the ambient level, the soil moisture, Rs, and the temperature sensitivity (Q10) values increased by an average of 17%, 16%, and 6%, respectively, and the soil temperature decreased by -1.3%. The greatest increases in Rs and Q10 were observed in arid areas, and the stimulation rates decreased with increases in climate humidity. When the decreased precipitation treatments were normalized to 28% below the ambient level, the soil moisture and Rs values decreased by an average of -14% and -17%, respectively, and the soil temperature and Q10 values were not altered. The reductions in soil moisture tended to be greater in more humid areas. Prolonged drought without alterations in the amount of precipitation reduced the soil moisture and Rs by -12% and -6%, respectively, but did not alter Q10. Overall, our synthesis suggests that soil moisture and Rs tend to be more sensitive to increased precipitation in more arid areas and more responsive to decreased precipitation in more humid areas. The responses of Rs and Q10 were predominantly driven by precipitation-induced changes in the soil moisture, whereas changes in the soil temperature had limited impacts. Finally, our synthesis of prolonged drought experiments also emphasizes the importance of the timing and frequency of precipitation events on ecosystem C cycles. Given these findings, we urge future studies to focus on manipulating the frequency, intensity, and seasonality of precipitation with an aim to improving our ability to predict and model feedback between Rs and climate change. © 2016 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61442
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Xiangshan, Beijing, China; University of Chinese Academy of Sciences, Yuquanlu, Beijing, China; Department of Integrative Biology, University of South Florida, Tampa, FL, United States; Department of Forestry and Environmental Resources, North Carolina State University, Raleigh, NC, United States; Department of Ecology, College of Urban and Environmental Science, Peking University, Beijing, China; State Key Laboratory of Cotton Biology, Key Laboratory of Plant Stress Biology, College of Life Sciences, Henan University, Kaifeng, Henan, China; Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
Recommended Citation:
Liu L.,Wang X.,Lajeunesse M.J.,et al. A cross-biome synthesis of soil respiration and its determinants under simulated precipitation changes[J]. Global Change Biology,2016-01-01,22(4)