DOI: 10.1111/gcb.14294
Scopus记录号: 2-s2.0-85047826471
论文题名: Drought timing influences the legacy of tree growth recovery
作者: Huang M. ; Wang X. ; Keenan T.F. ; Piao S.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 8 起始页码: 3546
结束页码: 3559
语种: 英语
英文关键词: drought timing
; extreme drought
; forest growth
; legacy effect
; tree-ring width
Scopus关键词: aridity
; baseline conditions
; database
; drought
; extreme event
; forest
; global climate
; growth response
; terrestrial ecosystem
; tree
; tree ring
英文摘要: Whether and how the timing of extreme events affects the direction and magnitude of legacy effects on tree growth is poorly understood. In this study, we use a global database of Ring-Width Index (RWI) from 2,500 sites to examine the impact and legacy effects (the departure of observed RWI from expected RWI) of extreme drought events during 1948–2008, with a particular focus on the influence of drought timing. We assessed the recovery of stem radial growth in the years following severe drought events with separate groupings designed to characterize the timing of the drought. We found that legacies from extreme droughts during the dry season (DS droughts) lasted longer and had larger impacts in each of the 3 years post drought than those from extreme droughts during the wet season (WS droughts). At the global scale, the average integrated legacy from DS droughts (0.18) was about nine times that from WS droughts (0.02). Site-level comparisons also suggest stronger negative impacts or weaker positive impacts of DS droughts on tree growth than WS droughts. Our results, therefore, highlight that the timing of drought is a crucial factor determining drought impacts on tree recovery. Further increases in baseline aridity could therefore exacerbate the impact of punctuated droughts on terrestrial ecosystems. © 2018 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110307
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: Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing, China; Lawrence Berkeley National Laboratory, Berkeley, CA, United States; UC Berkeley, Berkeley, CA, United States; Key Laboratory of Alpine Ecology and Biodiversity, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China; Center for Excellence in Tibetan Earth Science, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Huang M.,Wang X.,Keenan T.F.,et al. Drought timing influences the legacy of tree growth recovery[J]. Global Change Biology,2018-01-01,24(8)