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Aquatic export of young dissolved and gaseous carbon from a pristine boreal fen: Implications for peat carbon stock stability

Campeau, Audrey and Bishop, Kevin and Billett, Michael F. and Garnett, Mark H. and Laudon, Hjalmar and Leach, Jason and Nilsson, Mats and Wallin, Marcus (2017). Aquatic export of young dissolved and gaseous carbon from a pristine boreal fen: Implications for peat carbon stock stability. Global Change Biology. 23 , 5523-5536
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Abstract

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 (C-14) of dissolved organic carbon (DOC), carbon dioxide (CO2), and methane (CH4) exported from a boreal peatland catchment coupled with C-14 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 C-14 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.

Authors/Creators:Campeau, Audrey and Bishop, Kevin and Billett, Michael F. and Garnett, Mark H. and Laudon, Hjalmar and Leach, Jason and Nilsson, Mats and Wallin, Marcus
Title:Aquatic export of young dissolved and gaseous carbon from a pristine boreal fen: Implications for peat carbon stock stability
Series Name/Journal:Global Change Biology
Year of publishing :2017
Volume:23
Page range:5523-5536
Number of Pages:14
Publisher:WILEY
ISSN:1354-1013
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Environmental Sciences (social aspects to be 507)
Keywords:aquatic C export, carbon dioxide, dissolved organic carbon, methane, northern peatlands, radiocarbon dating
URN:NBN:urn:nbn:se:slu:epsilon-p-93158
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-93158
Additional ID:
Type of IDID
DOI10.1111/gcb.13815
Web of Science (WoS)000414969000046
Otherhttps://onlinelibrary.wiley.com/doi/full/10.1111/gcb.13815
ID Code:22762
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
S - Faculty of Forest Sciences
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
(S) > Dept. of Forest Ecology and Management
Deposited By: SLUpub Connector
Deposited On:16 Mar 2021 13:23
Metadata Last Modified:16 Mar 2021 13:31

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