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Aquatic export of young dissolved and gaseous carbon from a pristine boreal fen: Implications for peat carbon stock stability.
Glob Chang Biol 2017; 23(12):5523-5536GC

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

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.Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umeå, Sweden.Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umeå, Sweden.Department of Earth Sciences, Air water and Landscape, Uppsala University, Uppsala, Sweden.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

28712133

Citation

Campeau, Audrey, et al. "Aquatic Export of Young Dissolved and Gaseous Carbon From a Pristine Boreal Fen: Implications for Peat Carbon Stock Stability." Global Change Biology, vol. 23, no. 12, 2017, pp. 5523-5536.
Campeau A, Bishop KH, Billett MF, et al. Aquatic export of young dissolved and gaseous carbon from a pristine boreal fen: Implications for peat carbon stock stability. Glob Chang Biol. 2017;23(12):5523-5536.
Campeau, A., Bishop, K. H., Billett, M. F., Garnett, M. H., Laudon, H., Leach, J. A., ... Wallin, M. B. (2017). Aquatic export of young dissolved and gaseous carbon from a pristine boreal fen: Implications for peat carbon stock stability. Global Change Biology, 23(12), pp. 5523-5536. doi:10.1111/gcb.13815.
Campeau A, et al. Aquatic Export of Young Dissolved and Gaseous Carbon From a Pristine Boreal Fen: Implications for Peat Carbon Stock Stability. Glob Chang Biol. 2017;23(12):5523-5536. PubMed PMID: 28712133.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Aquatic export of young dissolved and gaseous carbon from a pristine boreal fen: Implications for peat carbon stock stability. AU - Campeau,Audrey, AU - Bishop,Kevin H, AU - Billett,Michael F, AU - Garnett,Mark H, AU - Laudon,Hjalmar, AU - Leach,Jason A, AU - Nilsson,Mats B, AU - Öquist,Mats G, AU - Wallin,Marcus B, Y1 - 2017/09/01/ PY - 2017/04/12/received PY - 2017/06/20/revised PY - 2017/06/22/accepted PY - 2017/7/18/pubmed PY - 2018/9/20/medline PY - 2017/7/17/entrez KW - aquatic C export KW - carbon dioxide KW - dissolved organic carbon KW - methane KW - northern peatlands KW - radiocarbon dating SP - 5523 EP - 5536 JF - Global change biology JO - Glob Chang Biol VL - 23 IS - 12 N2 - 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 (14 C) of dissolved organic carbon (DOC), carbon dioxide (CO2 ), and methane (CH4 ) exported from a boreal peatland catchment coupled with 14 C 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 14 C 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. SN - 1365-2486 UR - https://www.unboundmedicine.com/medline/citation/28712133/Aquatic_export_of_young_dissolved_and_gaseous_carbon_from_a_pristine_boreal_fen:_Implications_for_peat_carbon_stock_stability_ L2 - https://doi.org/10.1111/gcb.13815 DB - PRIME DP - Unbound Medicine ER -