Carbon balance of coniferous forests growing in contrasting climates : Model-based analysis
Identifieur interne : 00A733 ( Main/Exploration ); précédent : 00A732; suivant : 00A734Carbon balance of coniferous forests growing in contrasting climates : Model-based analysis
Auteurs : Belinda E. Medlyn [Australie] ; Paul Berbigier [France] ; Robert Clement [Royaume-Uni] ; Achim Grelle [Suède] ; Denis Loustau [France] ; Sune Linder [Suède] ; Lisa Wingate [Royaume-Uni] ; Paul G. Jarvis [Royaume-Uni] ; Bjarni D. Sigurdsson [Islande] ; Ross E. Mcmurtrie [Australie]Source :
- Agricultural and forest meteorology [ 0168-1923 ] ; 2005.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Climat.
English descriptors
- KwdEn :
Abstract
Forest carbon exchange contributes significantly to the global carbon balance and is therefore being monitored around the world, most notably using eddy covariance technology. In order to extrapolate from these measurements, we need to understand why carbon balance (or net ecosystem production, NEP) differs among forests. Here, we use a detailed model of forest carbon exchange applied to three coniferous European forests with differing NEP to pinpoint reasons for the differences among these sites. The model was parameterised using extensive ecophysiological data obtained at each site. These data gave evidence of major differences among sites in climate, leaf physiology, respiring biomass, leaf area index, and soil and biomass respiration rates. The model was compared with eddy covariance data and found to satisfactorily simulate carbon exchange by each forest. Simulations were then run which interchanged canopy structure, physiology and meteorology among sites, allowing us to quantify the contribution of each factor to the inter-site differences in gross primary productivity (GPP), ecosystem respiration (RE) and NEP. The most important factor was the difference in respiration rates, particularly soil respiration rates, among sites. Climate was also very important, with differences in incident photosynthetically active radiation (PAR) affecting GPP and differences in temperature affecting both GPP and RE. Effects of leaf area index, respiring biomass and leaf physiology on NEP were secondary, but still substantial. The work provides detailed quantitative evidence of the major factors causing differences in NEP among coniferous forests.
Affiliations:
- Australie, France, Islande, Royaume-Uni, Suède
- Nouvelle-Galles du Sud, Écosse
- Sydney, Édimbourg
- Université d'Édimbourg
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Medlyn</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>School of Biological, Earth and Environmental Sciences, University of NSW</s1><s2>Sydney 2052</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>10 aut.</sZ></inist:fA14><country>Australie</country><placeName><settlement type="city">Sydney</settlement><region type="état">Nouvelle-Galles du Sud</region></placeName></affiliation></author><author><name sortKey="Berbigier, Paul" sort="Berbigier, Paul" uniqKey="Berbigier P" first="Paul" last="Berbigier">Paul Berbigier</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>INRA-EPHYSE, BP 81</s1><s2>33883 Villenave d'Ornon</s2><s3>FRA</s3><sZ>2 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>33883 Villenave d'Ornon</wicri:noRegion><wicri:noRegion>BP 81</wicri:noRegion><wicri:noRegion>33883 Villenave d'Ornon</wicri:noRegion></affiliation></author><author><name sortKey="Clement, Robert" sort="Clement, Robert" uniqKey="Clement R" first="Robert" last="Clement">Robert Clement</name><affiliation wicri:level="4"><inist:fA14 i1="03"><s1>School of GeoSciences, University of Edinburgh, King's Buildings, Mayfietd Road</s1><s2>Edinburgh EH9 3JG</s2><s3>GBR</s3><sZ>3 aut.</sZ><sZ>7 aut.</sZ><sZ>8 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Edinburgh EH9 3JG</wicri:noRegion><orgName type="university">Université d'Édimbourg</orgName><placeName><settlement type="city">Édimbourg</settlement><region type="country">Écosse</region></placeName></affiliation></author><author><name sortKey="Grelle, Achim" sort="Grelle, Achim" uniqKey="Grelle A" first="Achim" last="Grelle">Achim Grelle</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Swedish University of Agricultural Sciences, Department of Ecology and Environmental Research, PO Box 7072</s1><s2>750 07 Uppsala</s2><s3>SWE</s3><sZ>4 aut.</sZ></inist:fA14><country>Suède</country><wicri:noRegion>750 07 Uppsala</wicri:noRegion></affiliation></author><author><name sortKey="Loustau, Denis" sort="Loustau, Denis" uniqKey="Loustau D" first="Denis" last="Loustau">Denis Loustau</name><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>INRA-EPHYSE, 69 mule d'Arcachon</s1><s2>33612 CESTAS</s2><s3>FRA</s3><sZ>5 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>33612 CESTAS</wicri:noRegion><wicri:noRegion>69 mule d'Arcachon</wicri:noRegion><wicri:noRegion>33612 CESTAS</wicri:noRegion></affiliation></author><author><name sortKey="Linder, Sune" sort="Linder, Sune" uniqKey="Linder S" first="Sune" last="Linder">Sune Linder</name><affiliation wicri:level="1"><inist:fA14 i1="06"><s1>Swedish University Agricultural Sciences, Southern Swedish Forest Research Centre, PO Box 49</s1><s2>230 53 Alnarp</s2><s3>SWE</s3><sZ>6 aut.</sZ></inist:fA14><country>Suède</country><wicri:noRegion>230 53 Alnarp</wicri:noRegion></affiliation></author><author><name sortKey="Wingate, Lisa" sort="Wingate, Lisa" uniqKey="Wingate L" first="Lisa" last="Wingate">Lisa Wingate</name><affiliation wicri:level="4"><inist:fA14 i1="03"><s1>School of GeoSciences, University of Edinburgh, King's Buildings, Mayfietd Road</s1><s2>Edinburgh EH9 3JG</s2><s3>GBR</s3><sZ>3 aut.</sZ><sZ>7 aut.</sZ><sZ>8 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Edinburgh EH9 3JG</wicri:noRegion><orgName type="university">Université d'Édimbourg</orgName><placeName><settlement type="city">Édimbourg</settlement><region type="country">Écosse</region></placeName></affiliation></author><author><name sortKey="Jarvis, Paul G" sort="Jarvis, Paul G" uniqKey="Jarvis P" first="Paul G." last="Jarvis">Paul G. Jarvis</name><affiliation wicri:level="4"><inist:fA14 i1="03"><s1>School of GeoSciences, University of Edinburgh, King's Buildings, Mayfietd Road</s1><s2>Edinburgh EH9 3JG</s2><s3>GBR</s3><sZ>3 aut.</sZ><sZ>7 aut.</sZ><sZ>8 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Edinburgh EH9 3JG</wicri:noRegion><orgName type="university">Université d'Édimbourg</orgName><placeName><settlement type="city">Édimbourg</settlement><region type="country">Écosse</region></placeName></affiliation></author><author><name sortKey="Sigurdsson, Bjarni D" sort="Sigurdsson, Bjarni D" uniqKey="Sigurdsson B" first="Bjarni D." last="Sigurdsson">Bjarni D. Sigurdsson</name><affiliation wicri:level="1"><inist:fA14 i1="07"><s1>Icelandic Forest Research, Mogilsa</s1><s2>116 Reykjavik</s2><s3>ISL</s3><sZ>9 aut.</sZ></inist:fA14><country>Islande</country><wicri:noRegion>116 Reykjavik</wicri:noRegion></affiliation></author><author><name sortKey="Mcmurtrie, Ross E" sort="Mcmurtrie, Ross E" uniqKey="Mcmurtrie R" first="Ross E." last="Mcmurtrie">Ross E. Mcmurtrie</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>School of Biological, Earth and Environmental Sciences, University of NSW</s1><s2>Sydney 2052</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>10 aut.</sZ></inist:fA14><country>Australie</country><placeName><settlement type="city">Sydney</settlement><region type="état">Nouvelle-Galles du Sud</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Agricultural and forest meteorology</title><title level="j" type="abbreviated">Agric. for. meteorol.</title><idno type="ISSN">0168-1923</idno><imprint><date when="2005">2005</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Agricultural and forest meteorology</title><title level="j" type="abbreviated">Agric. for. meteorol.</title><idno type="ISSN">0168-1923</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Applied mathematics</term><term>Biometeorology</term><term>Carbon balance</term><term>Climate</term><term>Coniferous forest</term><term>Ecosystem</term><term>Ecosystem functioning</term><term>Eddy correlation method</term><term>Exchange capacity</term><term>Forest zone</term><term>Modeling</term><term>Respiration</term><term>Softwood forest tree</term><term>Soils</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Bilan carboné</term><term>Forêt résineuse</term><term>Climat</term><term>Modélisation</term><term>Capacité échange</term><term>Fonctionnement écosystème</term><term>Respiration</term><term>Zone forestière</term><term>Ecosystème</term><term>Sol</term><term>Biométéorologie</term><term>Arbre forestier résineux</term><term>Mathématiques appliquées</term><term>Méthode corrélation turbulence</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Climat</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Forest carbon exchange contributes significantly to the global carbon balance and is therefore being monitored around the world, most notably using eddy covariance technology. In order to extrapolate from these measurements, we need to understand why carbon balance (or net ecosystem production, NEP) differs among forests. Here, we use a detailed model of forest carbon exchange applied to three coniferous European forests with differing NEP to pinpoint reasons for the differences among these sites. The model was parameterised using extensive ecophysiological data obtained at each site. These data gave evidence of major differences among sites in climate, leaf physiology, respiring biomass, leaf area index, and soil and biomass respiration rates. The model was compared with eddy covariance data and found to satisfactorily simulate carbon exchange by each forest. Simulations were then run which interchanged canopy structure, physiology and meteorology among sites, allowing us to quantify the contribution of each factor to the inter-site differences in gross primary productivity (GPP), ecosystem respiration (RE) and NEP. The most important factor was the difference in respiration rates, particularly soil respiration rates, among sites. Climate was also very important, with differences in incident photosynthetically active radiation (PAR) affecting GPP and differences in temperature affecting both GPP and RE. Effects of leaf area index, respiring biomass and leaf physiology on NEP were secondary, but still substantial. The work provides detailed quantitative evidence of the major factors causing differences in NEP among coniferous forests.</div></front></TEI><affiliations><list><country><li>Australie</li><li>France</li><li>Islande</li><li>Royaume-Uni</li><li>Suède</li></country><region><li>Nouvelle-Galles du Sud</li><li>Écosse</li></region><settlement><li>Sydney</li><li>Édimbourg</li></settlement><orgName><li>Université d'Édimbourg</li></orgName></list><tree><country name="Australie"><region name="Nouvelle-Galles du Sud"><name sortKey="Medlyn, Belinda E" sort="Medlyn, Belinda E" uniqKey="Medlyn B" first="Belinda E." last="Medlyn">Belinda E. Medlyn</name></region><name sortKey="Mcmurtrie, Ross E" sort="Mcmurtrie, Ross E" uniqKey="Mcmurtrie R" first="Ross E." last="Mcmurtrie">Ross E. Mcmurtrie</name></country><country name="France"><noRegion><name sortKey="Berbigier, Paul" sort="Berbigier, Paul" uniqKey="Berbigier P" first="Paul" last="Berbigier">Paul Berbigier</name></noRegion><name sortKey="Loustau, Denis" sort="Loustau, Denis" uniqKey="Loustau D" first="Denis" last="Loustau">Denis Loustau</name></country><country name="Royaume-Uni"><region name="Écosse"><name sortKey="Clement, Robert" sort="Clement, Robert" uniqKey="Clement R" first="Robert" last="Clement">Robert Clement</name></region><name sortKey="Jarvis, Paul G" sort="Jarvis, Paul G" uniqKey="Jarvis P" first="Paul G." last="Jarvis">Paul G. Jarvis</name><name sortKey="Wingate, Lisa" sort="Wingate, Lisa" uniqKey="Wingate L" first="Lisa" last="Wingate">Lisa Wingate</name></country><country name="Suède"><noRegion><name sortKey="Grelle, Achim" sort="Grelle, Achim" uniqKey="Grelle A" first="Achim" last="Grelle">Achim Grelle</name></noRegion><name sortKey="Linder, Sune" sort="Linder, Sune" uniqKey="Linder S" first="Sune" last="Linder">Sune Linder</name></country><country name="Islande"><noRegion><name sortKey="Sigurdsson, Bjarni D" sort="Sigurdsson, Bjarni D" uniqKey="Sigurdsson B" first="Bjarni D." last="Sigurdsson">Bjarni D. Sigurdsson</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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