气候变化领域集成服务门户(CCPortal): Multidecadal records of intrinsic water-use efficiency in the desert shrub Encelia farinosa reveal strong responses to climate change

CCPortal

DOI	10.1073/pnas.2008345117
	Multidecadal records of intrinsic water-use efficiency in the desert shrub Encelia farinosa reveal strong responses to climate change
	Driscoll A.W.; Bitter N.Q.; Sandquist D.R.; Ehleringer J.R.
发表日期	2020
ISSN	0027-8424
起始页码	18161
结束页码	18168
卷号	117 期号:31
英文摘要	While tree rings have enabled interannual examination of the influence of climate on trees, this is not possible for most shrubs. Here, we leverage a multidecadal record of annual foliar carbon isotope ratio collections coupled with 39 y of survey data from two populations of the drought-deciduous desert shrub Encelia farinosa to provide insight into water-use dynamics and climate. This carbon isotope record provides a unique opportunity to examine the response of desert shrubs to increasing temperature and water stress in a region where climate is changing rapidly. Population mean carbon isotope ratios fluctuated predictably in response to interannual variations in temperature, vapor pressure deficit, and precipitation, and responses were similar among individuals. We leveraged the well-established relationships between leaf carbon isotope ratios and the ratio of intracellular to ambient CO2 concentrations to calculate intrinsic water-use efficiency (iWUE) of the plants and to quantify plant responses to longterm environmental change. The population mean iWUE value increased by 53 to 58% over the study period, much more than the 20 to 30% increase that has been measured in forests [J. Peñuelas, J. G. Canadell, R. Ogaya, Glob. Ecol. Biogeogr. 20, 597-608 (2011)]. Changes were associated with both increased CO2 concentration and increased water stress. Individuals whose lifetimes spanned the entire study period exhibited increases in iWUE that were very similar to the population mean, suggesting that there was significant plasticity within individuals rather than selection at the population scale. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Carbon isotopes; Climate change; Iwue; Mojave desert; Stomatal conductance
语种	英语
scopus关键词	carbon dioxide; water; agricultural parameters; Article; climate change; concentration (parameter); controlled study; Encelia farinosa; environmental change; health survey; nonhuman; precipitation; prediction; priority journal; shrub; temperature measurement; temperature stress; vapor pressure; water stress; Asteraceae; desert climate; drought; metabolism; physiology; Asteraceae; Carbon Dioxide; Climate Change; Desert Climate; Droughts; Water
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160852
作者单位	Driscoll, A.W., School of Biological Sciences, University of Utah, Salt Lake City, UT 84112, United States; Bitter, N.Q., School of Biological Sciences, University of Utah, Salt Lake City, UT 84112, United States; Sandquist, D.R., Department of Biological Science, California State University, Fullerton, CA 92834, United States; Ehleringer, J.R., School of Biological Sciences, University of Utah, Salt Lake City, UT 84112, United States
推荐引用方式 GB/T 7714	Driscoll A.W.,Bitter N.Q.,Sandquist D.R.,et al. Multidecadal records of intrinsic water-use efficiency in the desert shrub Encelia farinosa reveal strong responses to climate change[J],2020,117(31).
APA	Driscoll A.W.,Bitter N.Q.,Sandquist D.R.,&Ehleringer J.R..(2020).Multidecadal records of intrinsic water-use efficiency in the desert shrub Encelia farinosa reveal strong responses to climate change.Proceedings of the National Academy of Sciences of the United States of America,117(31).
MLA	Driscoll A.W.,et al."Multidecadal records of intrinsic water-use efficiency in the desert shrub Encelia farinosa reveal strong responses to climate change".Proceedings of the National Academy of Sciences of the United States of America 117.31(2020).