globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13632
论文题名:
Circumpolar arctic tundra biomass and productivity dynamics in response to projected climate change and herbivory
作者: Yu Q.; Epstein H.; Engstrom R.; Walker D.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期:9
起始页码: 3895
结束页码: 3907
语种: 英语
英文关键词: arctic tundra ; climate change ; herbivory ; net primary productivity ; shrub expansion ; tundra greening ; vegetation biomass ; vegetation dynamics modeling
Scopus关键词: Bryophyta ; Rangifer
英文摘要: Satellite remote sensing data have indicated a general ‘greening’ trend in the arctic tundra biome. However, the observed changes based on remote sensing are the result of multiple environmental drivers, and the effects of individual controls such as warming, herbivory, and other disturbances on changes in vegetation biomass, community structure, and ecosystem function remain unclear. We apply ArcVeg, an arctic tundra vegetation dynamics model, to estimate potential changes in vegetation biomass and net primary production (NPP) at the plant community and functional type levels. ArcVeg is driven by soil nitrogen output from the Terrestrial Ecosystem Model, existing densities of Rangifer populations, and projected summer temperature changes by the NCAR CCSM4.0 general circulation model across the Arctic. We quantified the changes in aboveground biomass and NPP resulting from (i) observed herbivory only; (ii) projected climate change only; and (iii) coupled effects of projected climate change and herbivory. We evaluated model outputs of the absolute and relative differences in biomass and NPP by country, bioclimate subzone, and floristic province. Estimated potential biomass increases resulting from temperature increase only are approximately 5% greater than the biomass modeled due to coupled warming and herbivory. Such potential increases are greater in areas currently occupied by large or dense Rangifer herds such as the Nenets-occupied regions in Russia (27% greater vegetation increase without herbivores). In addition, herbivory modulates shifts in plant community structure caused by warming. Plant functional types such as shrubs and mosses were affected to a greater degree than other functional types by either warming or herbivory or coupled effects of the two. © 2017 John Wiley & Sons Ltd
资助项目: This study was supported by NASA/NEESPI Land Cover Land Use Change Initiative, Grant No. NNG6GE00A, NNX09AK56G, and NNX14AD90G, NSF Grant No. ARC-0531180, part of the Synthesis of Arctic System Science Initiative, NSF Grant No. ARC-0902152, part of the Changing Seasonality of Arctic Systems Initiative and NSF Grant CALM No. PLR-1304555 and ARCTIC-ERA No. ICER-1558389. We acknowledge the World Climate Research Programme's Working Group on Coupled Modelling, which is responsible for CMIP, and we thank the climate modeling groups for producing and making available their model output. For CMIP, the U.S. Department of Energy's Program for Climate Model Diagnosis and Intercomparison provides coordinating support and led development of software infrastructure in partnership with the Global Organization for Earth System Science Portals. We acknowledge Dr. Xiaoliang Lu from the Marine Biology Lab at the Woods Hole Oceanographic Institute who provided TEM soil data. We appreciate the constructive comments from anonymous reviewers which helped improve the manuscript.
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被引频次[WOS]:31   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60846
Appears in Collections:影响、适应和脆弱性

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作者单位: Department of Geography, The George Washington University, 1922F street NW, Washington, DC, United States; Department of Environmental Sciences, University of Virginia, 291 McCormick Rd, Charlottesville, VA, United States; Arctic Geobotany Center, University of Alaska, Fairbanks, AK, United States

Recommended Citation:
Yu Q.,Epstein H.,Engstrom R.,et al. Circumpolar arctic tundra biomass and productivity dynamics in response to projected climate change and herbivory[J]. Global Change Biology,2017-01-01,23(9)
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