Spatio-temporal drivers of soil and ecosystem carbon fluxes at field scale in an upland grassland in Germany

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Title:Main Title: Spatio-temporal drivers of soil and ecosystem carbon fluxes at field scale in an upland grassland in Germany
Description:Abstract: Ecosystem carbon (C) fluxes in terrestrial ecosystems are affected by varying environmental conditions (e.g., soil heterogeneity and 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.
Identifier:10.1016/j.agee.2015.05.008 (DOI)
Responsible Party
Creators:Nils Borchard (Author), Michael Schirrmann (Author), Christian von Hebel (Author), Marius Schmidt (Author), Roland Baatz (Author), Les Firbank (Author), Harry Vereecken (Author), Michael Herbst (Author)
Publisher:Elsevier
Publication Year:2015
Topic
TR32 Topic:Soil
Related Subproject:B1
Subjects:Keywords: Efflux, CO2, Carbon, NEE, Spatial Variability, Photosynthesis, Heterotrophic Respiration
File Details
Filename:2015_agee_Borchard.pdf
Data Type:Text - Article
Size:9 Pages
File Size:2 MB
Date:Accepted: 15.05.2015
Mime Type:application/pdf
Data Format:PDF
Language:English
Status:Completed
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Download Permission:Only Project Members
General Access and Use Conditions:For internal use only
Access Limitations:For internal use only
Licence:[TR32DB] Data policy agreement
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Specific Information - Publication
Publication Status:Published
Review Status:Peer reviewed
Publication Type:Article
Article Type:Journal
Source:Agriculture, Ecosystems and Environment
Volume:211
Number of Pages:10 (84 - 93)
Metadata Details
Metadata Creator:Michael Herbst
Metadata Created:10.06.2015
Metadata Last Updated:10.06.2015
Subproject:B1
Funding Phase:2
Metadata Language:English
Metadata Version:V50
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