Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/29454
Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Current forest carbon fixation fuels stream CO2 emissions
Author(s): Campeau, Audrey
Bishop, Kevin
Amvrosiadi, Nino
Billett, Michael F
Garnett, Mark H
Laudon, Hjalmar
Oquist, Mats G
Wallin, Marcus B
Issue Date: 23-Apr-2019
Citation: Campeau A, Bishop K, Amvrosiadi N, Billett MF, Garnett MH, Laudon H, Oquist MG & Wallin MB (2019) Current forest carbon fixation fuels stream CO2 emissions. Nature Communications, 10, Art. No.: 1876. https://doi.org/10.1038/s41467-019-09922-3
Abstract: Stream CO2 emissions contribute significantly to atmospheric climate forcing. While there are strong indications that groundwater inputs sustain these emissions, the specific biogeochemical pathways and timescales involved in this lateral CO2 export are still obscure. Here, via an extensive radiocarbon (14C) characterisation of CO2 and DOC in stream water and its groundwater sources in an old-growth boreal forest, we demonstrate that the 14C-CO2 is consistently in tune with the current atmospheric 14C-CO2 level and shows little association with the 14C-DOC in the same waters. Our findings thus indicate that stream CO2 emissions act as a shortcut that returns CO2 recently fixed by the forest vegetation to the atmosphere. Our results expose a positive feedback mechanism within the C budget of forested catchments, where stream CO2 emissions will be highly sensitive to changes in forest C allocation patterns associated with climate and land-use changes.
DOI Link: 10.1038/s41467-019-09922-3
Rights: This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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