Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13469 |
Rising plant-mediated methane emissions from arctic wetlands | |
Andresen, Christian G.1,2; Lara, Mark J.1,3; Tweedie, Craig E.1; Lougheed, Vanessa L.1 | |
2017-03-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Plant-mediated CH4 flux is an important pathway for land-atmosphere CH4 emissions, but the magnitude, timing, and environmental controls, spanning scales of space and time, remain poorly understood in arctic tundra wetlands, particularly under the long-term effects of climate change. CH4 fluxes were measured in situ during peak growing season for the dominant aquatic emergent plants in the Alaskan arctic coastal plain, Carex aquatilis and Arctophila fulva, to assess the magnitude and species- specific controls on CH4 flux. Plant biomass was a strong predictor of A. fulva CH4 flux while water depth and thaw depth were copredictors for C. aquatilis CH4 flux. We used plant and environmental data from 1971 to 1972 from the historic International Biological Program (IBP) research site near Barrow, Alaska, which we resampled in 2010-2013, to quantify changes in plant biomass and thaw depth, and used these to estimate species-specific decadal-scale changes in CH4 fluxes. A similar to 60% increase in CH4 flux was estimated from the observed plant biomass and thaw depth increases in tundra ponds over the past 40 years. Despite covering only similar to 5% of the landscape, we estimate that aquatic C. aquatilis and A. fulva account for two-thirds of the total regional CH4 flux of the Barrow Peninsula. The regionally observed increases in plant biomass and active layer thickening over the past 40 years not only have major implications for energy and water balance, but also have significantly altered land-atmosphere CH4 emissions for this region, potentially acting as a positive feedback to climate warming. |
英文关键词 | arctic biomass carbon climate change methane permafrost tundra wetlands |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000396829300015 |
WOS关键词 | ICE-WEDGE POLYGONS ; ECOTYPIC DIFFERENTIATION ; CAREX-AQUATILIS ; NORTHERN ALASKA ; VASCULAR PLANTS ; COASTAL TUNDRA ; VEGETATION ; THAW ; RESPONSES ; PERMAFROST |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17747 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Texas El Paso, Dept Biol Sci, El Paso, TX 79968 USA; 2.Los Alamos Natl Lab, Earth & Environm Sci Div, Los Alamos, NM 87545 USA; 3.Univ Alaska, Inst Arctic Biol, Fairbanks, AK 99775 USA |
推荐引用方式 GB/T 7714 | Andresen, Christian G.,Lara, Mark J.,Tweedie, Craig E.,et al. Rising plant-mediated methane emissions from arctic wetlands[J]. GLOBAL CHANGE BIOLOGY,2017,23(3). |
APA | Andresen, Christian G.,Lara, Mark J.,Tweedie, Craig E.,&Lougheed, Vanessa L..(2017).Rising plant-mediated methane emissions from arctic wetlands.GLOBAL CHANGE BIOLOGY,23(3). |
MLA | Andresen, Christian G.,et al."Rising plant-mediated methane emissions from arctic wetlands".GLOBAL CHANGE BIOLOGY 23.3(2017). |
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