NDLI: Soil Respiration in European Grasslands in Relation to Climate and Assimilate Supply

Content Provider	Springer Nature Link
Author	Bahn, Michael Rodeghiero, Mirco Anderson Dunn, Margaret Dore, Sabina Gime, Cristina Drösler, Matthias Williams, Michael Ammann, Christof Berninger, Frank Flechard, Chris Jones, Stephanie Balzarolo, Manuela Kumar, Suresh Newesely, Christian Priwitzer, Tibor Raschi, Antonio Siegwolf, Rolf Susiluoto, Sanna Tenhunen, John Wohlfahrt, Georg Cernusca, Alexander
Copyright Year	2008
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 (R s) in 20 European grasslands across a climatic transect, including ten meadows, eight pastures and two unmanaged grasslands. Maximum rates of R s ( $$ R_{{{\text{s}}_{{{\text{max}}}} }} $$ ), R s at a reference soil temperature (10°C; $$ R_{{{\text{s}}_{{{\text{10}}}} }} $$ ) and annual R s (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 $$ R_{{{\text{s}}_{{{\text{max}}}} }} $$ was closely related to $$ R_{{{\text{s}}_{{{\text{10}}}} }} $$ . Assimilate supply affected R s 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 R s. Temperature-independent seasonal fluctuations of R s of an intensively managed pasture were closely related to changes in leaf area index (LAI). Across sites $$ R_{{{\text{s}}_{{{\text{10}}}} }} $$ 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 R s 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 R s 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.
Starting Page	1352
Ending Page	1367
Page Count	16
File Format	PDF
ISSN	14329840
Journal	Ecosystems
Volume Number	11
Issue Number	8
e-ISSN	14350629
Language	English
Publisher	Springer-Verlag
Publisher Date	2008-10-15
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	soil CO2 efflux temperature moisture gross primary productivity leaf area index soil carbon land use Nature Conservation Geoecology/Natural Processes Environmental Management Zoology Plant Sciences Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology Environmental Chemistry Ecology, Evolution, Behavior and Systematics

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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Soil Respiration in European Grasslands in Relation to Climate and Assimilate Supply

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