气候变化领域集成服务门户(CCPortal): Contrasting responses of woody and grassland ecosystems to increased CO2 as water supply varies

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DOI	10.1038/s41559-021-01642-6
	Contrasting responses of woody and grassland ecosystems to increased CO2 as water supply varies
	Pan Y.; Jackson R.B.; Hollinger D.Y.; Phillips O.L.; Nowak R.S.; Norby R.J.; Oren R.; Reich P.B.; Lüscher A.; Mueller K.E.; Owensby C.; Birdsey R.; Hom J.; Luo Y.
发表日期	2022
ISSN	2397-334X
起始页码	315
结束页码	323
卷号	6 期号:3
英文摘要	Experiments show that elevated atmospheric CO2 (eCO2) often enhances plant photosynthesis and productivity, yet this effect varies substantially and may be climate sensitive. Understanding if, where and how water supply regulates CO2 enhancement is critical for projecting terrestrial responses to increasing atmospheric CO2 and climate change. Here, using data from 14 long-term ecosystem-scale CO2 experiments, we show that the eCO2 enhancement of annual aboveground net primary productivity is sensitive to annual precipitation and that this sensitivity differs between woody and grassland ecosystems. During wetter years, CO2 enhancement increases in woody ecosystems but declines in grass-dominated systems. Consistent with this difference, woody ecosystems can increase leaf area index in wetter years more effectively under eCO2 than can grassland ecosystems. Overall, and across different precipitation regimes, woody systems had markedly stronger CO2 enhancement (24%) than grasslands (13%). We developed an empirical relationship to quantify aboveground net primary productivity enhancement on the basis of changes in leaf area index, providing a new approach for evaluating eCO2 impacts on the productivity of terrestrial ecosystems. ? 2022, This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply.
语种	英语
scopus关键词	carbon dioxide; ecosystem; grassland; photosynthesis; water supply; Carbon Dioxide; Ecosystem; Grassland; Photosynthesis; Water Supply
来源期刊	Nature Ecology & Evolution
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257128
作者单位	USDA Forest Service, Northern Research Station, Durham, NH, United States; The Woods Institute for the Environment and at the Precourt Institute for Energy, Stanford University, Stanford, CA, United States; University of Leeds, School of Geography, Leeds, United Kingdom; Department of Natural Resources and Environmental Science, University of Nevada, Reno, NV, United States; Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, TN, United States; Nicholas School of the Environment and Pratt School of Engineering, Duke University, Durham, NC, United States; Department of Forest Science, University of Helsinki, Helsinki, Finland; Department of Forest Resources, University of Minnesota, St Paul, MN, United States; Institute for Global Change Biology and School for the Environment and Sustainability, University of Michigan, Ann Arbor, MI, United States; Western Sydney University, Penrith, NSW, Australia; ETH Zurich, Institute of Agricultural Science, Zurich, Switzerland; Agroscop...
推荐引用方式 GB/T 7714	Pan Y.,Jackson R.B.,Hollinger D.Y.,et al. Contrasting responses of woody and grassland ecosystems to increased CO2 as water supply varies[J],2022,6(3).
APA	Pan Y..,Jackson R.B..,Hollinger D.Y..,Phillips O.L..,Nowak R.S..,...&Luo Y..(2022).Contrasting responses of woody and grassland ecosystems to increased CO2 as water supply varies.Nature Ecology & Evolution,6(3).
MLA	Pan Y.,et al."Contrasting responses of woody and grassland ecosystems to increased CO2 as water supply varies".Nature Ecology & Evolution 6.3(2022).