globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13815
论文题名:
Aquatic export of young dissolved and gaseous carbon from a pristine boreal fen: Implications for peat carbon stock stability
作者: Campeau A.; Bishop K.H.; Billett M.F.; Garnett M.H.; Laudon H.; Leach J.A.; Nilsson M.B.; Öquist M.G.; Wallin M.B.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
语种: 英语
英文关键词: Aquatic C export ; Carbon dioxide ; Dissolved organic carbon ; Methane ; Northern peatlands ; Radiocarbon dating
英文摘要: The stability of northern peatland's carbon (C) store under changing climate is of major concern for the global C cycle. The aquatic export of C from boreal peatlands is recognized as both a critical pathway for the remobilization of peat C stocks as well as a major component of the net ecosystem C balance (NECB). Here, we present a full year characterization of radiocarbon content (14C) of dissolved organic carbon (DOC), carbon dioxide (CO2), and methane (CH4) exported from a boreal peatland catchment coupled with 14C characterization of the catchment's peat profile of the same C species. The age of aquatic C in runoff varied little throughout the year and appeared to be sustained by recently fixed C from the atmosphere (<60 years), despite stream DOC, CO2, and CH4 primarily being sourced from deep peat horizons (2-4 m) near the mire's outlet. In fact, the 14C content of DOC, CO2, and CH4 across the entire peat profile was considerably enriched with postbomb C compared with the solid peat material. Overall, our results demonstrate little to no mobilization of ancient C stocks from this boreal peatland and a relatively large resilience of the source of aquatic C export to forecasted hydroclimatic changes. © 2017 John Wiley & Sons Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61219
Appears in Collections:影响、适应和脆弱性

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作者单位: Department of Earth Sciences, Air water and Landscape Uppsala University Uppsala Sweden; Department of Aquatic Sciences and Assessment Swedish University of Agricultural Sciences Uppsala Sweden; Biological and Environmental Sciences Faculty of Natural Sciences University of Stirling Stirling UK; NERC Radiocarbon Facility Scottish Enterprise Technology Park East Kilbride, Glasgow UK; Department of Forest Ecology and Management Swedish University of Agricultural Sciences Umeå Sweden; Department of Geography Simon Fraser University Burnaby, BC Canada

Recommended Citation:
Campeau A.,Bishop K.H.,Billett M.F.,et al. Aquatic export of young dissolved and gaseous carbon from a pristine boreal fen: Implications for peat carbon stock stability[J]. Global Change Biology,2017-01-01
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