气候变化领域集成服务门户(CCPortal): CO2, nitrogen deposition and a discontinuous climate response drive water use efficiency in global forests

CCPortal

DOI	10.1038/s41467-021-25365-1
	CO2, nitrogen deposition and a discontinuous climate response drive water use efficiency in global forests
	Adams M.A.; Buckley T.N.; Binkley D.; Neumann M.; Turnbull T.L.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	Reduced stomatal conductance is a common plant response to rising atmospheric CO2 and increases water use efficiency (W). At the leaf-scale, W depends on water and nitrogen availability in addition to atmospheric CO2. In hydroclimate models W is a key driver of rainfall, droughts, and streamflow extremes. We used global climate data to derive Aridity Indices (AI) for forests over the period 1965–2015 and synthesised those with data for nitrogen deposition and W derived from stable isotopes in tree rings. AI and atmospheric CO2 account for most of the variance in W of trees across the globe, while cumulative nitrogen deposition has a significant effect only in regions without strong legacies of atmospheric pollution. The relation of aridity and W displays a clear discontinuity. W and AI are strongly related below a threshold value of AI ≈ 1 but are not related where AI > 1. Tree ring data emphasise that effective demarcation of water-limited from non-water-limited behaviour of stomata is critical to improving hydrological models that operate at regional to global scales. © 2021, The Author(s).
语种	英语
scopus关键词	carbon dioxide; rain; stable isotope; water; aridity; carbon dioxide; drought; global climate; hydrological modeling; stomatal conductance; streamflow; water use efficiency; air pollution; Article; drought; forest; global climate; hydroclimate; hydrological model; nitrogen availability; nitrogen deposition; plant water use
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/250630
作者单位	Department of Chemistry and Biotechnology, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Melbourne, VIC, Australia; School of Life and Environmental Sciences, University of Sydney, Sydney, NSW, Australia; Department of Plant Sciences, College of Agricultural and Environmental Sciences, University of California, Davis, CA, United States; School of Forestry, Northern Arizona University, Flagstaff, AZ, United States; Institute of Silviculture, Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences, Vienna, Austria
推荐引用方式 GB/T 7714	Adams M.A.,Buckley T.N.,Binkley D.,et al. CO2, nitrogen deposition and a discontinuous climate response drive water use efficiency in global forests[J],2021,12(1).
APA	Adams M.A.,Buckley T.N.,Binkley D.,Neumann M.,&Turnbull T.L..(2021).CO2, nitrogen deposition and a discontinuous climate response drive water use efficiency in global forests.Nature Communications,12(1).
MLA	Adams M.A.,et al."CO2, nitrogen deposition and a discontinuous climate response drive water use efficiency in global forests".Nature Communications 12.1(2021).