When does extreme drought elicit extreme ecological responses?

doi:10.1111/1365-2745.13226

	When does extreme drought elicit extreme ecological responses?
	Zhang, Fangyue 1,3; Quan, Quan 1,3; Ma, Fangfang 1,3; Tian, Dashuan 3; Hoover, David L.4; Zhou, Qingping 2; Niu, Shuli 1,3
刊名	JOURNAL OF ECOLOGY
	2019-11-01
卷号	107 期号:6 页码:2553-2563
关键词	climate extreme data mining extreme response gradient experiment meta-analysis resistance species asynchrony species richness
ISSN号	0022-0477
DOI	10.1111/1365-2745.13226
通讯作者	Niu, Shuli(sniu@igsnrr.ac.cn)
英文摘要	Global climate change models predict an increase in the frequency and intensity of extreme droughts, with uncertain ecological impacts across ecosystems. In particular, it is not clear when extreme droughts will elicit extreme ecological responses. For this study, we employed three complementary approaches to explore the relationships between extreme drought and ecosystem responses. First, we used global data mining to evaluate the relationship between extreme gross primary productivity and extreme precipitation from 1980 to 2013. Second, we conducted a meta-analysis using 132 drought experiments across the globe to assess the response ratios (RRs) of above-ground net primary productivity (ANPP) to extreme versus non-extreme drought treatments. Third, we examined community and ecosystem responses in an alpine meadow to a drought gradient experiment, which included five precipitation treatment levels (1/12 P, 1/4 P, 1/2 P, 3/4 P, and P, where P is the growing season precipitation). This study had three key results. In our historical data mining, we found that extreme droughts elicited extreme ecological responses only 15.1% of the time. The meta-analysis results indicated that there were no significant differences in the RRs of ANPP between the extreme versus non-extreme drought treatments. The drought gradient experiment results revealed that although the four drought treatments were statistically extreme, only the most extreme drought treatment (1/12 P) significantly reduced ANPP over the 3 years. Meanwhile, species richness and asynchrony were significantly reduced under the 1/12 P treatment, which led to a significant reduction in productivity. Synthesis. These results suggest that extreme ecological responses to extreme drought may be less frequent than previously thought. But when they do occur, extreme ecological responses may be driven by plant community changes such as species asynchrony, species loss or species reordering. Our experimental results highlight the key role of community dynamics in determining the resistance of ecosystem productivity to extreme drought, which should be assessed when predicting ecological responses to climate change.
WOS关键词	GROSS PRIMARY PRODUCTION ; ECOSYSTEM STABILITY ; CLIMATE-CHANGE ; TEMPORAL STABILITY ; WEATHER EVENTS ; BIODIVERSITY ; PRECIPITATION ; PRODUCTIVITY ; GRASSLAND ; RESISTANCE
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
语种	英语
出版者	WILEY
WOS记录号	WOS:000491025800004
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/129773]
专题	中国科学院地理科学与资源研究所
通讯作者	Niu, Shuli
作者单位	1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China 2.Southwest Minzu Univ, Inst Qinghai Tibetan Plateau, Chengdu, Sichuan, Peoples R China 3.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China 4.USDA ARS, Rangeland Resources & Syst Res Unit, Crops Res Lab, Ft Collins, CO 80522 USA
推荐引用方式 GB/T 7714	Zhang, Fangyue,Quan, Quan,Ma, Fangfang,et al. When does extreme drought elicit extreme ecological responses?[J]. JOURNAL OF ECOLOGY,2019,107(6):2553-2563.
APA	Zhang, Fangyue.,Quan, Quan.,Ma, Fangfang.,Tian, Dashuan.,Hoover, David L..,...&Niu, Shuli.(2019).When does extreme drought elicit extreme ecological responses?.JOURNAL OF ECOLOGY,107(6),2553-2563.
MLA	Zhang, Fangyue,et al."When does extreme drought elicit extreme ecological responses?".JOURNAL OF ECOLOGY 107.6(2019):2553-2563.