气候变化领域集成服务门户(CCPortal): Impacts of warming and elevated CO2 on a semi-arid grassland are non-additive, shift with precipitation, and reverse over time

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DOI	10.1111/ele.12634
	Impacts of warming and elevated CO2 on a semi-arid grassland are non-additive, shift with precipitation, and reverse over time
	Mueller K.E.; Blumenthal D.M.; Pendall E.; Carrillo Y.; Dijkstra F.A.; Williams D.G.; Follett R.F.; Morgan J.A.
发表日期	2016
ISSN	1461-023X
EISSN	1461-0248
卷号	19 期号:8
英文摘要	It is unclear how elevated CO2 (eCO2 ) and the corresponding shifts in temperature and precipitation will interact to impact ecosystems over time. During a 7-year experiment in a semi-arid grassland, the response of plant biomass to eCO2 and warming was largely regulated by interannual precipitation, while the response of plant community composition was more sensitive to experiment duration. The combined effects of eCO2 and warming on aboveground plant biomass were less positive in 'wet' growing seasons, but total plant biomass was consistently stimulated by ~ 25% due to unique, supra-additive responses of roots. Independent of precipitation, the combined effects of eCO2 and warming on C3 graminoids became increasingly positive and supra-additive over time, reversing an initial shift toward C4 grasses. Soil resources also responded dynamically and non-additively to eCO2 and warming, shaping the plant responses. Our results suggest grasslands are poised for drastic changes in function and highlight the need for long-term, factorial experiments. © 2016 John Wiley & Sons Ltd/CNRS.
英文关键词	Artemisia frigida; Bouteloua gracilis; C3 grass; C4 grass; climate change; forb; nitrogen; plant productivity; root biomass; soil moisture
学科领域	carbon dioxide; rain; chemistry; climate change; grassland; time factor; Carbon Dioxide; Climate Change; Grassland; Rain; Time Factors; Artemisia frigida; Bouteloua gracilis; Poaceae
语种	英语
scopus关键词	carbon dioxide; rain; chemistry; climate change; grassland; time factor; Carbon Dioxide; Climate Change; Grassland; Rain; Time Factors; Artemisia frigida; Bouteloua gracilis; Poaceae
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/118508
作者单位	Rangeland Resources Research Unit, Agricultural Research Service, United States Department of Agriculture, Fort Collins, CO, 80526, USA; Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, 2751, Australia, Australia; Centre for Carbon, Water and Food, Faculty of Agriculture and Environment, School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW, 2006, Australia, Australia; Department of Botany, University of Wyoming, Laramie, WY, 82071, USA, United States; Soil Plant and Nutrient Research Unit, Agricultural Research Service, United States Department of Agriculture, Fort Collins, CO, 80526, USA
推荐引用方式 GB/T 7714	Mueller K.E.,Blumenthal D.M.,Pendall E.,et al. Impacts of warming and elevated CO2 on a semi-arid grassland are non-additive, shift with precipitation, and reverse over time[J],2016,19(8).
APA	Mueller K.E..,Blumenthal D.M..,Pendall E..,Carrillo Y..,Dijkstra F.A..,...&Morgan J.A..(2016).Impacts of warming and elevated CO2 on a semi-arid grassland are non-additive, shift with precipitation, and reverse over time.Ecology letters,19(8).
MLA	Mueller K.E.,et al."Impacts of warming and elevated CO2 on a semi-arid grassland are non-additive, shift with precipitation, and reverse over time".Ecology letters 19.8(2016).