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DOI10.1038/s41467-020-16311-8
Massive peatland carbon banks vulnerable to rising temperatures
Hopple, A. M.1,2,3; Wilson, R. M.4; Kolton, M.5,6; Zalman, C. A.2; Chanton, J. P.4; Kostka, J.5,6; Hanson, P. J.7; Keller, J. K.2; Bridgham, S. D.1
2020-05-12
发表期刊NATURE COMMUNICATIONS
ISSN2041-1723
出版年2020
卷号11期号:1
文章类型Article
语种英语
国家USA
英文摘要

Peatlands contain one-third of the world's soil carbon (C). If destabilized, decomposition of this vast C bank could accelerate climate warming; however, the likelihood of this outcome remains unknown. Here, we examine peatland C stability through five years of whole-ecosystem warming and two years of elevated atmospheric carbon dioxide concentrations (eCO(2)). Warming exponentially increased methane (CH4) emissions and enhanced CH4 production rates throughout the entire soil profile; although surface CH4 production rates remain much greater than those at depth. Additionally, older deeper C sources played a larger role in decomposition following prolonged warming. Most troubling, decreases in CO2:CH4 ratios in gas production, porewater concentrations, and emissions, indicate that the peatland is becoming more methanogenic with warming. We observed limited evidence of eCO(2) effects. Our results suggest that ecosystem responses are largely driven by surface peat, but that the vast C bank at depth in peatlands is responsive to prolonged warming. One-third of Earth's carbon is sequestered in peatlands, and its stability in the face of climate change is unknown. Here the authors show that warming leads to the release of carbon as methane, but only the most prolonged warming leads to the breakdown and release of deep, old carbon.


领域地球科学 ; 气候变化 ; 资源环境
收录类别SCI-E
WOS记录号WOS:000537242500014
WOS关键词ORGANIC-MATTER ; METHANE EMISSIONS ; CLIMATE-CHANGE ; ELEVATED CO2 ; SOIL ; RESPIRATION ; CH4 ; PROJECT
WOS类目Multidisciplinary Sciences
WOS研究方向Science & Technology - Other Topics
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/249949
专题资源环境科学
作者单位1.Univ Oregon, Inst Ecol & Evolut, Eugene, OR 97403 USA;
2.Chapman Univ, Schmid Coll Sci & Technol, Orange, CA 92866 USA;
3.Pacific Northwest Natl Lab, Richland, WA 99354 USA;
4.Florida State Univ, Earth Ocean & Atmospher Sci, Tallahassee, FL 32306 USA;
5.Georgia Inst Technol, Sch Biol Sci, Atlanta, GA 30332 USA;
6.Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA;
7.Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA
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GB/T 7714
Hopple, A. M.,Wilson, R. M.,Kolton, M.,et al. Massive peatland carbon banks vulnerable to rising temperatures[J]. NATURE COMMUNICATIONS,2020,11(1).
APA Hopple, A. M..,Wilson, R. M..,Kolton, M..,Zalman, C. A..,Chanton, J. P..,...&Bridgham, S. D..(2020).Massive peatland carbon banks vulnerable to rising temperatures.NATURE COMMUNICATIONS,11(1).
MLA Hopple, A. M.,et al."Massive peatland carbon banks vulnerable to rising temperatures".NATURE COMMUNICATIONS 11.1(2020).
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