globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13598
论文题名:
Climate change-induced vegetation shifts lead to more ecological droughts despite projected rainfall increases in many global temperate drylands
作者: Tietjen B.; Schlaepfer D.R.; Bradford J.B.; Lauenroth W.K.; Hall S.A.; Duniway M.C.; Hochstrasser T.; Jia G.; Munson S.M.; Pyke D.A.; Wilson S.D.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期:7
起始页码: 2743
结束页码: 2754
语种: 英语
英文关键词: direct and indirect effects ; drought risk ; ecohydrological model ; shrub encroachment ; soil water availability ; vegetation impacts
英文摘要: Drylands occur worldwide and are particularly vulnerable to climate change because dryland ecosystems depend directly on soil water availability that may become increasingly limited as temperatures rise. Climate change will both directly impact soil water availability and change plant biomass, with resulting indirect feedbacks on soil moisture. Thus, the net impact of direct and indirect climate change effects on soil moisture requires better understanding. We used the ecohydrological simulation model SOILWAT at sites from temperate dryland ecosystems around the globe to disentangle the contributions of direct climate change effects and of additional indirect, climate change-induced changes in vegetation on soil water availability. We simulated current and future climate conditions projected by 16 GCMs under RCP 4.5 and RCP 8.5 for the end of the century. We determined shifts in water availability due to climate change alone and due to combined changes of climate and the growth form and biomass of vegetation. Vegetation change will mostly exacerbate low soil water availability in regions already expected to suffer from negative direct impacts of climate change (with the two RCP scenarios giving us qualitatively similar effects). By contrast, in regions that will likely experience increased water availability due to climate change alone, vegetation changes will counteract these increases due to increased water losses by interception. In only a small minority of locations, climate change-induced vegetation changes may lead to a net increase in water availability. These results suggest that changes in vegetation in response to climate change may exacerbate drought conditions and may dampen the effects of increased precipitation, that is, leading to more ecological droughts despite higher precipitation in some regions. Our results underscore the value of considering indirect effects of climate change on vegetation when assessing future soil moisture conditions in water-limited ecosystems. © 2017 John Wiley & Sons Ltd
资助项目: This work was conducted as a part of the Climate Change and Ecohydrology in Temperate Drylands Working Group supported by the John Wesley Powell Center for Analysis and Synthesis, funded by the US Geological Survey. We thank Ryan Murphy, the National Center for Atmospheric Research-Wyoming Supercomputing Center, and the Advanced Research Computing Center's Mount Moran/Bighorn facilities at the University of Wyoming for programming support and Thomas Piernicke for support with data preparation. B.T. acknowledges support by the German Research Foundation (TI 824/2-1). Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the US Government.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60911
Appears in Collections:影响、适应和脆弱性

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作者单位: Institute of Biology, Biodiversity and Ecological Modeling, Freie Universität Berlin, Altensteinstr. 34, Berlin, Germany; Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany; Department of Botany, University of Wyoming, Laramie, WY, United States; Section of Conservation Biology, Department of Environmental Sciences, University of Basel, Basel, Switzerland; US Geological Survey, Southwest Biological Science Center, Flagstaff, AZ, United States; Center for Sustaining Agriculture and Natural Resources, Washington State University, Wenatchee, WA, United States; SAH Ecologia LLC, Wenatchee, WA, United States; US Geological Survey, Southwest Biological Science Center, Moab, UT, United States; School of Biology and Environmental Science, University College Dublin, Belfield, Dublin 4, Ireland; CAS Institute of Atmospheric Physics, Beijing, China; US Geological Survey, Forest and Rangeland Ecosystem Science Center, Corvallis, OR, United States; Department of Biology, University of Regina, Regina, SK, Canada; Department of Ecology and Environmental Science, Climate Impacts Research Centre, Umeå University, Abisko, Sweden

Recommended Citation:
Tietjen B.,Schlaepfer D.R.,Bradford J.B.,et al. Climate change-induced vegetation shifts lead to more ecological droughts despite projected rainfall increases in many global temperate drylands[J]. Global Change Biology,2017-01-01,23(7)
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