Temperature and moisture controls of C fluxes in grazed Subalpine grasslands

The aim of this research was to determine how changes in soil moisture and temperature influence ecosystem C fluxes in the context of changing grazing regimes in subalpine grasslands in the Pyrenees. We (i) measured CO2 fluxes in the field in cattle- and sheep- grazed areas, and (ii) compared respon...

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Autores: Sjögersten, Sofie, Llurba, Rosa, Ribas Artola, Àngela, Yanez-Serrano, Ana, Sebastià, Ma. T.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2012
País:España
Institución:Universitat de Lleida (UdL)
Repositorio:Repositori Obert UdL
OAI Identifier:oai:repositori.udl.cat:10459.1/63076
Acceso en línea:https://doi.org/10.1657/1938-4246-44.2.239
http://hdl.handle.net/10459.1/63076
Access Level:acceso abierto
Palabra clave:Pastures
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spelling Temperature and moisture controls of C fluxes in grazed Subalpine grasslandsSjögersten, SofieLlurba, RosaRibas Artola, ÀngelaYanez-Serrano, AnaSebastià, Ma. T.PasturesThe aim of this research was to determine how changes in soil moisture and temperature influence ecosystem C fluxes in the context of changing grazing regimes in subalpine grasslands in the Pyrenees. We (i) measured CO2 fluxes in the field in cattle- and sheep- grazed areas, and (ii) compared responses of CO2 and CH4 fluxes from soil turf samples from cattle- and sheep-grazed areas to changes in soil temperature and moisture. The cattle-grazed area showed greater ecosystem respiration and gross ecosystem photosynthesis than the sheep-grazed areas. With respect to the temperature and moisture treatments, the two areas responded in a similar way: Soil moisture was the strongest driver of soil respiration rates; although temperature also increased CO2 effluxes from the soils, the effects were transient. The greatest effluxes of CO2 were found in soils incubated at elevated temperature and 80% soil moisture content. Methane fluxes were only influenced by the moisture treatment, with the greatest methane oxidation rates found at 40% soil moisture content. We conclude that regional changes in moisture availability resulting from climate change are likely to be the most important driver of soil respiration and methane fluxes in these grazed subalpine ecosystems.This work was funded by the University of Nottingham and the projects from the Spanish Ministry of Science and Innovation CARBOAGROPAS (CGL2006-13555-CO3-01/BOS), OBAMA (CGL2009-13425-C02-01 /BOS), and MONTES (Consolider- Ingenio CSD2008-000). We are grateful for field and laboratory support from Daniel Ventura and CTFC staff. Dr. Brian Atkinson provided a much appreciated internal review on the manuscriptInstitute of Arctic and Alpine Research2012info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://doi.org/10.1657/1938-4246-44.2.239http://hdl.handle.net/10459.1/63076reponame:Repositori Obert UdL instname:Universitat de Lleida (UdL)Inglésinfo:eu-repo/grantAgreement/MEC//CGL2006-13555-C03-01info:eu-repo/grantAgreement/MICINN//CGL2009-13425-C02-01Reproducció del document publicat a: https://doi.org/10.1657/1938-4246-44.2.239Arctic Antarctic and Alpine Research, 2012, vol. 44, núm. 2, p. 239-246info:eu-repo/semantics/openAccessoai:repositori.udl.cat:10459.1/630762026-06-24T12:42:17Z
dc.title.none.fl_str_mv Temperature and moisture controls of C fluxes in grazed Subalpine grasslands
title Temperature and moisture controls of C fluxes in grazed Subalpine grasslands
spellingShingle Temperature and moisture controls of C fluxes in grazed Subalpine grasslands
Sjögersten, Sofie
Pastures
title_short Temperature and moisture controls of C fluxes in grazed Subalpine grasslands
title_full Temperature and moisture controls of C fluxes in grazed Subalpine grasslands
title_fullStr Temperature and moisture controls of C fluxes in grazed Subalpine grasslands
title_full_unstemmed Temperature and moisture controls of C fluxes in grazed Subalpine grasslands
title_sort Temperature and moisture controls of C fluxes in grazed Subalpine grasslands
dc.creator.none.fl_str_mv Sjögersten, Sofie
Llurba, Rosa
Ribas Artola, Àngela
Yanez-Serrano, Ana
Sebastià, Ma. T.
author Sjögersten, Sofie
author_facet Sjögersten, Sofie
Llurba, Rosa
Ribas Artola, Àngela
Yanez-Serrano, Ana
Sebastià, Ma. T.
author_role author
author2 Llurba, Rosa
Ribas Artola, Àngela
Yanez-Serrano, Ana
Sebastià, Ma. T.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Pastures
topic Pastures
description The aim of this research was to determine how changes in soil moisture and temperature influence ecosystem C fluxes in the context of changing grazing regimes in subalpine grasslands in the Pyrenees. We (i) measured CO2 fluxes in the field in cattle- and sheep- grazed areas, and (ii) compared responses of CO2 and CH4 fluxes from soil turf samples from cattle- and sheep-grazed areas to changes in soil temperature and moisture. The cattle-grazed area showed greater ecosystem respiration and gross ecosystem photosynthesis than the sheep-grazed areas. With respect to the temperature and moisture treatments, the two areas responded in a similar way: Soil moisture was the strongest driver of soil respiration rates; although temperature also increased CO2 effluxes from the soils, the effects were transient. The greatest effluxes of CO2 were found in soils incubated at elevated temperature and 80% soil moisture content. Methane fluxes were only influenced by the moisture treatment, with the greatest methane oxidation rates found at 40% soil moisture content. We conclude that regional changes in moisture availability resulting from climate change are likely to be the most important driver of soil respiration and methane fluxes in these grazed subalpine ecosystems.
publishDate 2012
dc.date.none.fl_str_mv 2012
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.1657/1938-4246-44.2.239
http://hdl.handle.net/10459.1/63076
url https://doi.org/10.1657/1938-4246-44.2.239
http://hdl.handle.net/10459.1/63076
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/MEC//CGL2006-13555-C03-01
info:eu-repo/grantAgreement/MICINN//CGL2009-13425-C02-01
Reproducció del document publicat a: https://doi.org/10.1657/1938-4246-44.2.239
Arctic Antarctic and Alpine Research, 2012, vol. 44, núm. 2, p. 239-246
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Institute of Arctic and Alpine Research
publisher.none.fl_str_mv Institute of Arctic and Alpine Research
dc.source.none.fl_str_mv reponame:Repositori Obert UdL
instname:Universitat de Lleida (UdL)
instname_str Universitat de Lleida (UdL)
reponame_str Repositori Obert UdL
collection Repositori Obert UdL
repository.name.fl_str_mv
repository.mail.fl_str_mv
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