The University of Dublin | Trinity College -- Ollscoil Átha Cliath | Coláiste na Tríonóide
Trinity's Access to Research Archive
Home :: Log In :: Submit :: Alerts ::

School of Natural Science >
Botany >
Botany (Scholarly Publications) >

Please use this identifier to cite or link to this item:

Title: Soil respiration in European grasslands in relation to climate and assimilate supply
Author's Homepage:
Keywords: Biological Sciences
Soil respiration
Issue Date: 2008
Publisher: Springer Verlag
Citation: Bahn, M., Anderson, M., Dore, S., Gimeno, C., Drösler, M., Williams, M., Acosta, M., Ammann, C., Berninger, F., Flechard, C., Jones, S., Kumar, S., Newesely, R.S., Pavelka, M., Priwitzer, T., Raschi, A., Siegwolf, R., Susiluto, S., Tenhunen, J., Wohlfahrt, G., and Cernusca, A.,, Soil respiration in European grasslands in relation to climate and assimilate supply, ECOSYSTEMS, 11, 2008, 1352 - 1367
Series/Report no.: ECOSYSTEMS;
Abstract: Soil respiration constitutes the second largest flux of carbon (C) between terrestrial ecosystems and the atmosphere. This study provides a synthesis of soil respiration (Rs) in 20 European grasslands across a climatic transect, including ten meadows, eight pastures and two unmanaged grasslands. Maximum rates of Rs (Rsmax), Rs at a reference soil temperature (10°C; Rs10) and annual Rs (estimated for 13 sites) ranged from 1.9 to 15.9 μmol CO2 m−2 s−1, 0.3 to 5.5 μmol CO2 m−2 s−1 and 58 to 1988 g C m−2 y−1, respectively. Values obtained for Central European mountain meadows are amongst the highest so far reported for any type of ecosystem. Across all sites Rsmax was closely related to Rs10. Assimilate supply affected Rs at timescales from daily (but not necessarily diurnal) to annual. Reductions of assimilate supply by removal of aboveground biomass through grazing and cutting resulted in a rapid and a significant decrease of Rs. Temperature-independent seasonal fluctuations of Rs of an intensively managed pasture were closely related to changes in leaf area index (LAI). Across sites Rs10 increased with mean annual soil temperature (MAT), LAI and gross primary productivity (GPP), indicating that assimilate supply overrides potential acclimation to prevailing temperatures. Also annual Rs was closely related to LAI and GPP. Because the latter two parameters were coupled to MAT, temperature was a suitable surrogate for deriving estimates of annual Rs across the grasslands studied. These findings contribute to our understanding of regional patterns of soil C fluxes and highlight the importance of assimilate supply for soil CO2 emissions at various timescales.
Description: PUBLISHED
Related links:
Appears in Collections:Botany (Scholarly Publications)

Files in This Item:

File Description SizeFormat
Bahn et al 2008.pdfPublished (publisher's copy) - Peer Reviewed444.94 kBAdobe PDFView/Open

This item is protected by original copyright

Please note: There is a known bug in some browsers that causes an error when a user tries to view large pdf file within the browser window. If you receive the message "The file is damaged and could not be repaired", please try one of the solutions linked below based on the browser you are using.

Items in TARA are protected by copyright, with all rights reserved, unless otherwise indicated.


Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback