Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13844 |
Impact of winter roads on boreal peatland carbon exchange | |
Strack, Maria1; Softa, Divya1; Bird, Melanie2; Xu, Bin2 | |
2018 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2018 |
卷号 | 24期号:1页码:E201-E212 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | Across Canada's boreal forest, linear disturbances, including cutlines such as seismic lines and roads, crisscross the landscape to facilitate resource exploration and extraction; many of these linear disturbances cross peatland ecosystems. Changes in tree canopy cover and the compression of the peat by heavy equipment alter local thermal, hydrological, and ecological conditions, likely changing carbon exchange on the disturbance, and possibly in the adjacent peatland. We measured bulk density, water table, soil temperature, plant cover, and CO2 and CH4 flux along triplicate transects crossing a winter road through a wooded fen near Peace River, Alberta, Canada. Sample plots were located 1, 5, and 10 m from the road on both sides with an additional three plots on the road. Productivity of the overstory trees, when present, was also determined. The winter road had higher bulk density, shallower water table, higher graminoid cover, and thawed earlier than the adjacent peatland. Tree productivity and CO2 flux varied between the plots, and there was no clear pattern in relation to distance from the road. The plots on the winter road acted as a greater CO2 sink and greater CH4 source compared to the adjacent peatland with plots on the winter road emitting on average (standard error) 479 (138) compared to 41 (10) mg CH4 m(-2) day(-1) in the adjacent peatland. Considering both gases, global warming potential increased from 70 to 250 g CO(2)e m(-2) year(-1) in the undisturbed area to 2100 g CO(2)e m(-2) year(-1) on the winter road. Although carbon fluxes on any given cutline through peatland will vary depending on level of compaction, line width and vegetation community shifts, the large number of linear disturbances in Canada's boreal forest and slow recovery on peatland ecosites suggest they could represent an important anthropogenic greenhouse gas source. |
英文关键词 | carbon dioxide cutline greenhouse gas emissions land-use change linear disturbance methane |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000426506100017 |
WOS关键词 | WATER-TABLE DRAWDOWN ; METHANE EMISSIONS ; SEISMIC LINES ; FOREST VEGETATION ; NORTHERN ALBERTA ; VASCULAR PLANTS ; HOLOCENE CARBON ; CLIMATE-CHANGE ; DIOXIDE FLUX ; DYNAMICS |
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/17734 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Waterloo, Dept Geog & Environm Management, Waterloo, ON, Canada; 2.NAIT Boreal Res Inst, Peace River, AB, Canada |
推荐引用方式 GB/T 7714 | Strack, Maria,Softa, Divya,Bird, Melanie,et al. Impact of winter roads on boreal peatland carbon exchange[J]. GLOBAL CHANGE BIOLOGY,2018,24(1):E201-E212. |
APA | Strack, Maria,Softa, Divya,Bird, Melanie,&Xu, Bin.(2018).Impact of winter roads on boreal peatland carbon exchange.GLOBAL CHANGE BIOLOGY,24(1),E201-E212. |
MLA | Strack, Maria,et al."Impact of winter roads on boreal peatland carbon exchange".GLOBAL CHANGE BIOLOGY 24.1(2018):E201-E212. |
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