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  Hydrology-driven ecosystem respiration determines the carbon balance of a boreal peatland

Gazovic, M., Forbrich, I., Jager, D. F., Kutzbach, L., Wille, C., & Wilmking, M. (2013). Hydrology-driven ecosystem respiration determines the carbon balance of a boreal peatland. Science of the Total Environment, 463, 675-682. doi:10.1016/j.scitotenv.2013.06.077.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0019-D92A-3 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0023-E1C5-7
Genre: Journal Article

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 Creators:
Gazovic, Michal1, Author
Forbrich, Inke1, Author
Jager, Daniel F.1, Author
Kutzbach, Lars2, Author
Wille, Christian1, Author
Wilmking, Martin1, Author
Affiliations:
1external, ou_persistent22              
2CRG Regional Hydrology in Terrestrial Systems, Research Area B: Climate Manifestations and Impacts, The CliSAP Cluster of Excellence, External Organizations, Bundesstraße 53, 20146 Hamburg, DE, ou_2025292              

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Free keywords: DISSOLVED ORGANIC-CARBON; WATER-TABLE; TERRESTRIAL ECOSYSTEMS; METHANE EMISSIONS; NORTHERN PEATLAND; CLIMATE-CHANGE; EXCHANGE; DIOXIDE; FLUXES; FENCarbon cycling; Eddy covariance; Inter-annual variations;
 Abstract: The carbon (C) balance of boreal peatlands is mainly the sum of three different C fluxes: carbon dioxide (CO2), methane (CH4) and dissolved organic carbon (DOC). lntra- and inter-annual dynamics of these fluxes are differentially controlled by similar factors, such as temperature and water-table. Different climatic conditions within and between years might thus result in varying absolute and relative contributions of each flux to net ecosystem productivity (NEP). In this study CO2 fluxes were measured at a boreal peatland in eastern Finland during a dry year (2006) and a wet year (2007) and combined with DOC and CH4 fluxes from the same site. CO2 uptake in the wet year was 65% higher than in the dry year, caused by higher water table (WT) and subsequently reduced rates of soil respiration. Two to three-fold increases in DOC and CH4 fluxes in the wet year did not completely offset the higher CO2 uptake in that year, resulting in NEP of -83.7 +/- 14 g C M-2 in the dry and 134.5 +/- 21 g C 111(-2) in the wet year. Thus, in our study, WT was identified as the most important factor responsible for variations in the C balance between the observed years. (C) 2013 Elsevier By. All rights reserved.

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Language(s): eng - English
 Dates: 2013
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: ISI: 000325831200076
DOI: 10.1016/j.scitotenv.2013.06.077
 Degree: -

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Title: Science of the Total Environment
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 463 Sequence Number: - Start / End Page: 675 - 682 Identifier: ISSN: 0048-9697
CoNE: https://pure.mpg.de/cone/journals/resource/954925457007