气候变化领域集成服务门户(CCPortal): Drought timing influences the legacy of tree growth recovery

CCPortal

DOI	10.1111/gcb.14294
	Drought timing influences the legacy of tree growth recovery
	Huang, Mengtian; Wang, Xuhui; Keenan, Trevor F.; Piao, Shilong
通讯作者	Wang, XH (通讯作者)
发表日期	2018
ISSN	1354-1013
EISSN	1365-2486
起始页码	3546
结束页码	3559
卷号	24 期号:8
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 3years 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.
关键词	MESOPHYLL CONDUCTANCE BACTERIAL-GROWTH WATER DEFICITS VEGETATION PRODUCTIVITY PROLONGED DROUGHT EXTREME DROUGHTS CLIMATE EXTREMES CARBON EXCHANGE FOREST TREES DIE-OFF
英文关键词	drought timing; extreme drought; forest growth; legacy effect; tree-ring width
语种	英语
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS记录号	WOS:000437284700024
来源期刊	GLOBAL CHANGE BIOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259307
推荐引用方式 GB/T 7714	Huang, Mengtian,Wang, Xuhui,Keenan, Trevor F.,et al. Drought timing influences the legacy of tree growth recovery[J]. 中国科学院青藏高原研究所,2018,24(8).
APA	Huang, Mengtian,Wang, Xuhui,Keenan, Trevor F.,&Piao, Shilong.(2018).Drought timing influences the legacy of tree growth recovery.GLOBAL CHANGE BIOLOGY,24(8).
MLA	Huang, Mengtian,et al."Drought timing influences the legacy of tree growth recovery".GLOBAL CHANGE BIOLOGY 24.8(2018).