Age-related changes in litter inputs explain annual trends in soil CO2 effluxes over a full Eucalyptus rotation vafter afforestation of a tropical savannah
Land use changes such as savannah afforestation with eucalypts impact the soil carbon (C) balance, therefore affecting soil CO2 efflux (Fs), a major flux in the global C cycle. We tested the hypothesis that Fs increases with stand age after afforestation, due to an increasing input of fresh organic matter to the forest floor. In a Eucalyptus plantation established on coastal savannahs in Congo, bimonthly measurements of Fs were carried out for 1 year on three adjacent stands aged 0.9, 4.4 and 13.7 years and presenting similar growth patterns. Litterfall and litter accumulation on the forest floor were quantified over a chronosequence. Equations were derived to estimate the contribution of litter decomposition to Fs throughout the rotation. Litterfall increased with stand age after savannah afforestation. Fs, that was strongly correlated on a seasonal basis with soil water content (SWC) in all stands, decreased between ages 0.9 year and 4.4 years due to savannah residue depletion, and increased between ages 4.4 years and 13.7 years, mainly because of an increasing amount of decomposing eucalypt litter. The aboveground litter layer therefore appeared as a major source of CO2, whose contribution to Fs in old stands was estimated to be about four times higher than that of the eucalypt-derived soil organic C pool. The high litter contribution to Fs in older stands might explain why 13.7 years-old stand Fs was limited by moisture all year round whereas SWC did not limit Fs for large parts of the year in the youngest stands.
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dig-cirad-fr-5674432024-01-28T21:08:55Z http://agritrop.cirad.fr/567443/ http://agritrop.cirad.fr/567443/ Age-related changes in litter inputs explain annual trends in soil CO2 effluxes over a full Eucalyptus rotation vafter afforestation of a tropical savannah. Nouvellon Yann, Epron Daniel, Marsden Claire, Kinana Antoine, Le Maire Guerric, Deleporte Philippe, Saint André Laurent, Bouillet Jean-Pierre, Laclau Jean-Paul. 2012. Biogeochemistry, 111 (1-3) : 515-533.https://doi.org/10.1007/s10533-011-9685-9 <https://doi.org/10.1007/s10533-011-9685-9> Age-related changes in litter inputs explain annual trends in soil CO2 effluxes over a full Eucalyptus rotation vafter afforestation of a tropical savannah Nouvellon, Yann Epron, Daniel Marsden, Claire Kinana, Antoine Le Maire, Guerric Deleporte, Philippe Saint André, Laurent Bouillet, Jean-Pierre Laclau, Jean-Paul eng 2012 Biogeochemistry K10 - Production forestière P33 - Chimie et physique du sol F61 - Physiologie végétale - Nutrition Eucalyptus plantation forestière litière forestière reconstitution forestière savane couverture végétale rotation de coupe âge cycle du carbone matière organique du sol transport des substances nutritives http://aims.fao.org/aos/agrovoc/c_2683 http://aims.fao.org/aos/agrovoc/c_3048 http://aims.fao.org/aos/agrovoc/c_3047 http://aims.fao.org/aos/agrovoc/c_13802 http://aims.fao.org/aos/agrovoc/c_6825 http://aims.fao.org/aos/agrovoc/c_25409 http://aims.fao.org/aos/agrovoc/c_28066 http://aims.fao.org/aos/agrovoc/c_186 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_35657 http://aims.fao.org/aos/agrovoc/c_5272 Brésil http://aims.fao.org/aos/agrovoc/c_1070 Land use changes such as savannah afforestation with eucalypts impact the soil carbon (C) balance, therefore affecting soil CO2 efflux (Fs), a major flux in the global C cycle. We tested the hypothesis that Fs increases with stand age after afforestation, due to an increasing input of fresh organic matter to the forest floor. In a Eucalyptus plantation established on coastal savannahs in Congo, bimonthly measurements of Fs were carried out for 1 year on three adjacent stands aged 0.9, 4.4 and 13.7 years and presenting similar growth patterns. Litterfall and litter accumulation on the forest floor were quantified over a chronosequence. Equations were derived to estimate the contribution of litter decomposition to Fs throughout the rotation. Litterfall increased with stand age after savannah afforestation. Fs, that was strongly correlated on a seasonal basis with soil water content (SWC) in all stands, decreased between ages 0.9 year and 4.4 years due to savannah residue depletion, and increased between ages 4.4 years and 13.7 years, mainly because of an increasing amount of decomposing eucalypt litter. The aboveground litter layer therefore appeared as a major source of CO2, whose contribution to Fs in old stands was estimated to be about four times higher than that of the eucalypt-derived soil organic C pool. The high litter contribution to Fs in older stands might explain why 13.7 years-old stand Fs was limited by moisture all year round whereas SWC did not limit Fs for large parts of the year in the youngest stands. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/567443/1/document_567443.pdf application/pdf Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1007/s10533-011-9685-9 10.1007/s10533-011-9685-9 info:eu-repo/semantics/altIdentifier/doi/10.1007/s10533-011-9685-9 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1007/s10533-011-9685-9 |
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Biblioteca del CIRAD Francia |
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K10 - Production forestière P33 - Chimie et physique du sol F61 - Physiologie végétale - Nutrition Eucalyptus plantation forestière litière forestière reconstitution forestière savane couverture végétale rotation de coupe âge cycle du carbone matière organique du sol transport des substances nutritives http://aims.fao.org/aos/agrovoc/c_2683 http://aims.fao.org/aos/agrovoc/c_3048 http://aims.fao.org/aos/agrovoc/c_3047 http://aims.fao.org/aos/agrovoc/c_13802 http://aims.fao.org/aos/agrovoc/c_6825 http://aims.fao.org/aos/agrovoc/c_25409 http://aims.fao.org/aos/agrovoc/c_28066 http://aims.fao.org/aos/agrovoc/c_186 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_35657 http://aims.fao.org/aos/agrovoc/c_5272 http://aims.fao.org/aos/agrovoc/c_1070 K10 - Production forestière P33 - Chimie et physique du sol F61 - Physiologie végétale - Nutrition Eucalyptus plantation forestière litière forestière reconstitution forestière savane couverture végétale rotation de coupe âge cycle du carbone matière organique du sol transport des substances nutritives http://aims.fao.org/aos/agrovoc/c_2683 http://aims.fao.org/aos/agrovoc/c_3048 http://aims.fao.org/aos/agrovoc/c_3047 http://aims.fao.org/aos/agrovoc/c_13802 http://aims.fao.org/aos/agrovoc/c_6825 http://aims.fao.org/aos/agrovoc/c_25409 http://aims.fao.org/aos/agrovoc/c_28066 http://aims.fao.org/aos/agrovoc/c_186 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_35657 http://aims.fao.org/aos/agrovoc/c_5272 http://aims.fao.org/aos/agrovoc/c_1070 |
spellingShingle |
K10 - Production forestière P33 - Chimie et physique du sol F61 - Physiologie végétale - Nutrition Eucalyptus plantation forestière litière forestière reconstitution forestière savane couverture végétale rotation de coupe âge cycle du carbone matière organique du sol transport des substances nutritives http://aims.fao.org/aos/agrovoc/c_2683 http://aims.fao.org/aos/agrovoc/c_3048 http://aims.fao.org/aos/agrovoc/c_3047 http://aims.fao.org/aos/agrovoc/c_13802 http://aims.fao.org/aos/agrovoc/c_6825 http://aims.fao.org/aos/agrovoc/c_25409 http://aims.fao.org/aos/agrovoc/c_28066 http://aims.fao.org/aos/agrovoc/c_186 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_35657 http://aims.fao.org/aos/agrovoc/c_5272 http://aims.fao.org/aos/agrovoc/c_1070 K10 - Production forestière P33 - Chimie et physique du sol F61 - Physiologie végétale - Nutrition Eucalyptus plantation forestière litière forestière reconstitution forestière savane couverture végétale rotation de coupe âge cycle du carbone matière organique du sol transport des substances nutritives http://aims.fao.org/aos/agrovoc/c_2683 http://aims.fao.org/aos/agrovoc/c_3048 http://aims.fao.org/aos/agrovoc/c_3047 http://aims.fao.org/aos/agrovoc/c_13802 http://aims.fao.org/aos/agrovoc/c_6825 http://aims.fao.org/aos/agrovoc/c_25409 http://aims.fao.org/aos/agrovoc/c_28066 http://aims.fao.org/aos/agrovoc/c_186 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_35657 http://aims.fao.org/aos/agrovoc/c_5272 http://aims.fao.org/aos/agrovoc/c_1070 Nouvellon, Yann Epron, Daniel Marsden, Claire Kinana, Antoine Le Maire, Guerric Deleporte, Philippe Saint André, Laurent Bouillet, Jean-Pierre Laclau, Jean-Paul Age-related changes in litter inputs explain annual trends in soil CO2 effluxes over a full Eucalyptus rotation vafter afforestation of a tropical savannah |
description |
Land use changes such as savannah afforestation with eucalypts impact the soil carbon (C) balance, therefore affecting soil CO2 efflux (Fs), a major flux in the global C cycle. We tested the hypothesis that Fs increases with stand age after afforestation, due to an increasing input of fresh organic matter to the forest floor. In a Eucalyptus plantation established on coastal savannahs in Congo, bimonthly measurements of Fs were carried out for 1 year on three adjacent stands aged 0.9, 4.4 and 13.7 years and presenting similar growth patterns. Litterfall and litter accumulation on the forest floor were quantified over a chronosequence. Equations were derived to estimate the contribution of litter decomposition to Fs throughout the rotation. Litterfall increased with stand age after savannah afforestation. Fs, that was strongly correlated on a seasonal basis with soil water content (SWC) in all stands, decreased between ages 0.9 year and 4.4 years due to savannah residue depletion, and increased between ages 4.4 years and 13.7 years, mainly because of an increasing amount of decomposing eucalypt litter. The aboveground litter layer therefore appeared as a major source of CO2, whose contribution to Fs in old stands was estimated to be about four times higher than that of the eucalypt-derived soil organic C pool. The high litter contribution to Fs in older stands might explain why 13.7 years-old stand Fs was limited by moisture all year round whereas SWC did not limit Fs for large parts of the year in the youngest stands. |
format |
article |
topic_facet |
K10 - Production forestière P33 - Chimie et physique du sol F61 - Physiologie végétale - Nutrition Eucalyptus plantation forestière litière forestière reconstitution forestière savane couverture végétale rotation de coupe âge cycle du carbone matière organique du sol transport des substances nutritives http://aims.fao.org/aos/agrovoc/c_2683 http://aims.fao.org/aos/agrovoc/c_3048 http://aims.fao.org/aos/agrovoc/c_3047 http://aims.fao.org/aos/agrovoc/c_13802 http://aims.fao.org/aos/agrovoc/c_6825 http://aims.fao.org/aos/agrovoc/c_25409 http://aims.fao.org/aos/agrovoc/c_28066 http://aims.fao.org/aos/agrovoc/c_186 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_35657 http://aims.fao.org/aos/agrovoc/c_5272 http://aims.fao.org/aos/agrovoc/c_1070 |
author |
Nouvellon, Yann Epron, Daniel Marsden, Claire Kinana, Antoine Le Maire, Guerric Deleporte, Philippe Saint André, Laurent Bouillet, Jean-Pierre Laclau, Jean-Paul |
author_facet |
Nouvellon, Yann Epron, Daniel Marsden, Claire Kinana, Antoine Le Maire, Guerric Deleporte, Philippe Saint André, Laurent Bouillet, Jean-Pierre Laclau, Jean-Paul |
author_sort |
Nouvellon, Yann |
title |
Age-related changes in litter inputs explain annual trends in soil CO2 effluxes over a full Eucalyptus rotation vafter afforestation of a tropical savannah |
title_short |
Age-related changes in litter inputs explain annual trends in soil CO2 effluxes over a full Eucalyptus rotation vafter afforestation of a tropical savannah |
title_full |
Age-related changes in litter inputs explain annual trends in soil CO2 effluxes over a full Eucalyptus rotation vafter afforestation of a tropical savannah |
title_fullStr |
Age-related changes in litter inputs explain annual trends in soil CO2 effluxes over a full Eucalyptus rotation vafter afforestation of a tropical savannah |
title_full_unstemmed |
Age-related changes in litter inputs explain annual trends in soil CO2 effluxes over a full Eucalyptus rotation vafter afforestation of a tropical savannah |
title_sort |
age-related changes in litter inputs explain annual trends in soil co2 effluxes over a full eucalyptus rotation vafter afforestation of a tropical savannah |
url |
http://agritrop.cirad.fr/567443/ http://agritrop.cirad.fr/567443/1/document_567443.pdf |
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