气候变化领域集成服务门户(CCPortal): Enhanced interannual precipitation variability increases plant functional diversity that in turn ameliorates negative impact on productivity

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DOI	10.1111/ele.12523
	Enhanced interannual precipitation variability increases plant functional diversity that in turn ameliorates negative impact on productivity
	Gherardi L.A.; Sala O.E.
发表日期	2015
ISSN	1461-023X
EISSN	1461-0248
卷号	18 期号:12
英文摘要	Although precipitation interannual variability is projected to increase due to climate change, effects of changes in precipitation variance have received considerable less attention than effects of changes in the mean state of climate. Interannual precipitation variability effects on functional diversity and its consequences for ecosystem functioning are assessed here using a 6-year rainfall manipulation experiment. Five precipitation treatments were switched annually resulting in increased levels of precipitation variability while maintaining average precipitation constant. Functional diversity showed a positive response to increased variability due to increased evenness. Dominant grasses decreased and rare plant functional types increased in abundance because grasses showed a hump-shaped response to precipitation with a maximum around modal precipitation, whereas rare species peaked at high precipitation values. Increased functional diversity ameliorated negative effects of precipitation variability on primary production. Rare species buffered the effect of precipitation variability on the variability in total productivity because their variance decreases with increasing precipitation variance. © 2015 John Wiley & Sons Ltd/CNRS.
英文关键词	Arid zones; Climate change; Ecosystem functioning; Functional diversity; Grassland; Interannual; Precipitation variability; Productivity; Stability
学科领域	abundance; annual variation; biological production; climate change; community composition; community response; ecosystem function; experimental study; grass; grassland; plant community; precipitation assessment; primary production; rare species; species diversity; Poaceae; rain; biodiversity; grassland; New Mexico; plant physiology; season; Biodiversity; Grassland; New Mexico; Plant Physiological Phenomena; Rain; Seasons
语种	英语
scopus关键词	abundance; annual variation; biological production; climate change; community composition; community response; ecosystem function; experimental study; grass; grassland; plant community; precipitation assessment; primary production; rare species; species diversity; Poaceae; rain; biodiversity; grassland; New Mexico; plant physiology; season; Biodiversity; Grassland; New Mexico; Plant Physiological Phenomena; Rain; Seasons
来源期刊	Ecology Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118610
作者单位	School of Life Sciences, Arizona State University, Tempe, AZ 85287-4501, United States; School of Sustainability, Arizona State University, Tempe, AZ 85287-4501, United States
推荐引用方式 GB/T 7714	Gherardi L.A.,Sala O.E.. Enhanced interannual precipitation variability increases plant functional diversity that in turn ameliorates negative impact on productivity[J],2015,18(12).
APA	Gherardi L.A.,&Sala O.E..(2015).Enhanced interannual precipitation variability increases plant functional diversity that in turn ameliorates negative impact on productivity.Ecology Letters,18(12).
MLA	Gherardi L.A.,et al."Enhanced interannual precipitation variability increases plant functional diversity that in turn ameliorates negative impact on productivity".Ecology Letters 18.12(2015).