globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13469
论文题名:
Rising plant-mediated methane emissions from arctic wetlands
作者: Andresen C.G.; Lara M.J.; Tweedie C.E.; Lougheed V.L.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期:3
起始页码: 1128
结束页码: 1139
语种: 英语
英文关键词: arctic ; biomass ; carbon ; climate change ; methane ; permafrost ; tundra ; wetlands
Scopus关键词: Arctophila fulva ; Carex aquatilis
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 ~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 ~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. © 2016 John Wiley & Sons Ltd
资助项目: This study was funded by the National Science Foundation (NSF) Graduate Research Fellowship Program to CGA (NSF-1110312) and research funding to VLL (ARC-0909502) and CET (ANS-0732885). Any opinions, findings, conclusions, or recommendations do not necessarily reflect the views of the NSF. Thanks to NGEE Arctic project for supporting CGA on the final edits of this manuscript. Thanks to Frankie Reyes, Christina Hernandez, Nicole Miller, and Sandra Villarreal for their help in the field. Thanks to UMIAQ, the Barrow Arctic Science Consortium (BASC) and the Ukpeagvik Iñupiaq Corporation (UIC) for logistical support and land access.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61024
Appears in Collections:影响、适应和脆弱性

Files in This Item:

There are no files associated with this item.


作者单位: Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX, United States; Earth and Environmental Science Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Institute of Arctic Biology, University of Alaska, Fairbanks, AK, United States

Recommended Citation:
Andresen C.G.,Lara M.J.,Tweedie C.E.,et al. Rising plant-mediated methane emissions from arctic wetlands[J]. Global Change Biology,2017-01-01,23(3)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Andresen C.G.]'s Articles
[Lara M.J.]'s Articles
[Tweedie C.E.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Andresen C.G.]'s Articles
[Lara M.J.]'s Articles
[Tweedie C.E.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Andresen C.G.]‘s Articles
[Lara M.J.]‘s Articles
[Tweedie C.E.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.