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globalchange > 过去全球变化的重建

DOI:	10.1371/journal.pone.0101756
论文题名:	Large Carbon Dioxide Fluxes from Headwater Boreal and Sub-Boreal Streams
作者:	Jason J. Venkiteswaran; Sherry L. Schiff; Marcus B. Wallin
刊名:	PLOS ONE
ISSN:	1932-6203
出版年:	2014
发表日期:	2014-7-24
卷:	9, 期:7
语种:	英语
英文关键词:	Carbon dioxide ; Lakes ; Carbon sequestration ; Forests ; Carbonates ; Atmosphere ; Fractionation ; Surface water
英文摘要:	Half of the world's forest is in boreal and sub-boreal ecozones, containing large carbon stores and fluxes. Carbon lost from headwater streams in these forests is underestimated. We apply a simple stable carbon isotope idea for quantifying the CO2 loss from these small streams; it is based only on in-stream samples and integrates over a significant distance upstream. We demonstrate that conventional methods of determining CO2 loss from streams necessarily underestimate the CO2 loss with results from two catchments. Dissolved carbon export from headwater catchments is similar to CO2 loss from stream surfaces. Most of the CO2 originating in high CO2 groundwaters has been lost before typical in-stream sampling occurs. In the Harp Lake catchment in Canada, headwater streams account for 10% of catchment net CO2 uptake. In the Krycklan catchment in Sweden, this more than doubles the CO2 loss from the catchment. Thus, even when corrected for aquatic CO2 loss measured by conventional methods, boreal and sub-boreal forest carbon budgets currently overestimate carbon sequestration on the landscape.
URL:	http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0101756&type=printable
Citation statistics:
资源类型:	期刊论文
标识符:	http://119.78.100.158/handle/2HF3EXSE/17903
Appears in Collections:	过去全球变化的重建影响、适应和脆弱性科学计划与规划气候变化与战略全球变化的国际研究计划气候减缓与适应气候变化事实与影响

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File Name/ File Size	Content Type	Version	Access	License
journal.pone.0101756.PDF（699KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	View Download

作者单位:

Department of Earth and Environmental Sciences, University of Waterloo, Waterloo, Ontario, Canada;Department of Geography and Environmental Studies, Wilfrid Laurier University, Waterloo, Ontario, Canada;Department of Earth and Environmental Sciences, University of Waterloo, Waterloo, Ontario, Canada;Department of Ecology and Genetics/Limnology, Uppsala University, Uppsala, Sweden

Recommended Citation:

Jason J. Venkiteswaran,Sherry L. Schiff,Marcus B. Wallin. Large Carbon Dioxide Fluxes from Headwater Boreal and Sub-Boreal Streams[J]. PLOS ONE,2014-01-01,9(7)

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