DOI: 10.1111/gcb.13941
Scopus记录号: 2-s2.0-85035191769
论文题名: Shifts of growing-season precipitation peaks decrease soil respiration in a semiarid grassland
作者: Ru J. ; Zhou Y. ; Hui D. ; Zheng M. ; Wan S.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 3 起始页码: 1001
结束页码: 1011
语种: 英语
英文关键词: carbon cycling
; climate change
; plants
; soil
; temperate steppe
; water
英文摘要: Changing precipitation regimes could have profound influences on carbon (C) cycle in the biosphere. However, how soil C release from terrestrial ecosystems responds to changing seasonal distribution of precipitation remains unclear. A field experiment was conducted for 4 years (2013–2016) to examine the effects of altered precipitation distributions in the growing season on soil respiration in a temperate steppe in the Mongolian Plateau. Over the 4 years, both advanced and delayed precipitation peaks suppressed soil respiration, and the reductions mainly occurred in August. The decreased soil respiration could be primarily attributable to water stress and subsequently limited plant growth (community cover and belowground net primary productivity) and soil microbial activities in the middle growing season, suggesting that precipitation amount in the middle growing season is more important than that in the early, late, or whole growing seasons in regulating soil C release in grasslands. The observations of the additive effects of advanced and delayed precipitation peaks indicate semiarid grasslands will release less C through soil respiratory processes under the projected seasonal redistribution of precipitation in the future. Our findings highlight the potential role of intra-annual redistribution of precipitation in regulating ecosystem C cycling in arid and semiarid regions. © 2017 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110486
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: School of Life Sciences, International Joint Research Laboratory for Global Change Ecology, Henan University, Kaifeng, Henan, China; Department of Biological Sciences, Tennessee State University, Nashville, TN, United States
Recommended Citation:
Ru J.,Zhou Y.,Hui D.,et al. Shifts of growing-season precipitation peaks decrease soil respiration in a semiarid grassland[J]. Global Change Biology,2018-01-01,24(3)