Borchard, N, Schirrmann, M, von Hebel, C et al. (5 more authors) (2015) Spatio-temporal drivers of soil and ecosystem carbon fluxes at field scale in an upland grassland in Germany. Agriculture, Ecosystems and Environment, 211. pp. 84-93. ISSN 0167-8809
Abstract
Ecosystem carbon (C) fluxes in terrestrial ecosystems are affected by varying environmental conditions (e.g. soil heterogeneity and the weather) and land management. However, the interactions between soil respiration (Rs) and net ecosystem exchange (NEE) and their spatio-temporal dependence on environmental conditions and land management at field scale is not well understood. We performed repeated C flux measurement at 21 sites during the 2013 growing season in a temperate upland grassland in Germany, which was fertilized and cut three times according to the agricultural practice typical of the region. Repeated measurements included determination of NEE, Rs, leaf area index (LAI), meteorological conditions as well as physical and chemical soil properties. Temporal variability of Rs was controlled by air temperature, while LAI influenced the temporal variability of NEE. The three grass cuts reduced LAI and affected NEE markedly. More than 50% of NEE variability was explained by defoliation at field scale. Additionally, soil heterogeneity affected NEE, but to a lower extent (>30%), while Rs remained unaffected. We conclude that grassland management (i.e. repeated defoliation) and soil heterogeneity affects the spatio-temporal variability of NEE at field scale.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2015, Elsevier. This is an author produced version of a paper published in Agriculture, Ecosystems and Environment. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Net ecosystem exchange; Soil respiration; Grassland management; Leaf area index; Spatio-temporal variability; Field scale; Soil properties |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Biological Sciences (Leeds) > School of Biology (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 16 Jun 2015 11:28 |
Last Modified: | 15 Jun 2016 08:30 |
Published Version: | http://dx.doi.org/10.1016/j.agee.2015.05.008 |
Status: | Published |
Publisher: | Elsevier Masson |
Identification Number: | 10.1016/j.agee.2015.05.008 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:87062 |