Short- and long-term influence of litter quality and quantity on simulated heterotrophic soil respiration in a lowland tropical forest
Heterotrophic soil respiration (SRH) alone can contribute up to 50% of total ecosystem respiration in tropical forests. Whereas the abiotic controls of SRH have been extensively studied, the influence of plant traits is less well characterised. We used field experiments and a modelling approach to test the relative influence of plant traits on SRH in lowland tropical forest in French Guiana. We measured leaf- and root litter traits for five common tree species and conducted a root decomposition experiment to evaluate the influence of root chemistry on decay rates. We measured SRH in trenched plots and used our field measurements to parameterize and test the Century model of soil C dynamics. Overall, the Century model performed well in simulating SRH, and species-specific root decomposition in Century corresponded well to decomposition rates measured in situ. Root litter characterized by low lignin-to-nitrogen ratios decomposed more rapidly than low-quality root litter during the first 6 months. Model runs over different time scales revealed that litter quality substantially influenced SRH on an annual time-scale by determining the rates of root- and leaf litter decomposition. However, litter mass had an overriding influence on SRH over the longer term in 20-year model runs. Synthesis Using simple plant trait data to parameterise the Century model, we were able to accurately simulate changes in SRH in a lowland tropical forest. Our results suggest that this approach could be used to predict changes in tropical soil C dynamics under global change scenarios by including data on changes in plant productivity and C inputs to the soil (for example litterfall and root turnover).
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dig-cirad-fr-5834922024-01-29T00:02:52Z http://agritrop.cirad.fr/583492/ http://agritrop.cirad.fr/583492/ Short- and long-term influence of litter quality and quantity on simulated heterotrophic soil respiration in a lowland tropical forest. Bréchet Laëtitia, Le Dantec Valérie, Ponton Stéphane, Goret Jean-Yves, Sayer Emma, Bonal Damien, Freycon Vincent, Roy Jacques, Epron Daniel. 2017. Ecosystems, 20 (6) : 1190-1204.https://doi.org/10.1007/s10021-016-0104-x <https://doi.org/10.1007/s10021-016-0104-x> Short- and long-term influence of litter quality and quantity on simulated heterotrophic soil respiration in a lowland tropical forest Bréchet, Laëtitia Le Dantec, Valérie Ponton, Stéphane Goret, Jean-Yves Sayer, Emma Bonal, Damien Freycon, Vincent Roy, Jacques Epron, Daniel eng 2017 Ecosystems K01 - Foresterie - Considérations générales P33 - Chimie et physique du sol F60 - Physiologie et biochimie végétale forêt forêt tropicale sol de forêt litière forestière respiration du sol écosystème forestier dégradation cycle du carbone racine composition chimique biologie du sol Houppier http://aims.fao.org/aos/agrovoc/c_3062 http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_3051 http://aims.fao.org/aos/agrovoc/c_3047 http://aims.fao.org/aos/agrovoc/c_33553 http://aims.fao.org/aos/agrovoc/c_1374842133961 http://aims.fao.org/aos/agrovoc/c_2159 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_6651 http://aims.fao.org/aos/agrovoc/c_1794 http://aims.fao.org/aos/agrovoc/c_7160 http://aims.fao.org/aos/agrovoc/c_16172 Guyane française France http://aims.fao.org/aos/agrovoc/c_3093 http://aims.fao.org/aos/agrovoc/c_3081 Heterotrophic soil respiration (SRH) alone can contribute up to 50% of total ecosystem respiration in tropical forests. Whereas the abiotic controls of SRH have been extensively studied, the influence of plant traits is less well characterised. We used field experiments and a modelling approach to test the relative influence of plant traits on SRH in lowland tropical forest in French Guiana. We measured leaf- and root litter traits for five common tree species and conducted a root decomposition experiment to evaluate the influence of root chemistry on decay rates. We measured SRH in trenched plots and used our field measurements to parameterize and test the Century model of soil C dynamics. Overall, the Century model performed well in simulating SRH, and species-specific root decomposition in Century corresponded well to decomposition rates measured in situ. Root litter characterized by low lignin-to-nitrogen ratios decomposed more rapidly than low-quality root litter during the first 6 months. Model runs over different time scales revealed that litter quality substantially influenced SRH on an annual time-scale by determining the rates of root- and leaf litter decomposition. However, litter mass had an overriding influence on SRH over the longer term in 20-year model runs. Synthesis Using simple plant trait data to parameterise the Century model, we were able to accurately simulate changes in SRH in a lowland tropical forest. Our results suggest that this approach could be used to predict changes in tropical soil C dynamics under global change scenarios by including data on changes in plant productivity and C inputs to the soil (for example litterfall and root turnover). article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/583492/7/s10021-016-0104-x.pdf text Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1007/s10021-016-0104-x 10.1007/s10021-016-0104-x info:eu-repo/semantics/altIdentifier/doi/10.1007/s10021-016-0104-x info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1007/s10021-016-0104-x |
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K01 - Foresterie - Considérations générales P33 - Chimie et physique du sol F60 - Physiologie et biochimie végétale forêt forêt tropicale sol de forêt litière forestière respiration du sol écosystème forestier dégradation cycle du carbone racine composition chimique biologie du sol Houppier http://aims.fao.org/aos/agrovoc/c_3062 http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_3051 http://aims.fao.org/aos/agrovoc/c_3047 http://aims.fao.org/aos/agrovoc/c_33553 http://aims.fao.org/aos/agrovoc/c_1374842133961 http://aims.fao.org/aos/agrovoc/c_2159 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_6651 http://aims.fao.org/aos/agrovoc/c_1794 http://aims.fao.org/aos/agrovoc/c_7160 http://aims.fao.org/aos/agrovoc/c_16172 http://aims.fao.org/aos/agrovoc/c_3093 http://aims.fao.org/aos/agrovoc/c_3081 K01 - Foresterie - Considérations générales P33 - Chimie et physique du sol F60 - Physiologie et biochimie végétale forêt forêt tropicale sol de forêt litière forestière respiration du sol écosystème forestier dégradation cycle du carbone racine composition chimique biologie du sol Houppier http://aims.fao.org/aos/agrovoc/c_3062 http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_3051 http://aims.fao.org/aos/agrovoc/c_3047 http://aims.fao.org/aos/agrovoc/c_33553 http://aims.fao.org/aos/agrovoc/c_1374842133961 http://aims.fao.org/aos/agrovoc/c_2159 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_6651 http://aims.fao.org/aos/agrovoc/c_1794 http://aims.fao.org/aos/agrovoc/c_7160 http://aims.fao.org/aos/agrovoc/c_16172 http://aims.fao.org/aos/agrovoc/c_3093 http://aims.fao.org/aos/agrovoc/c_3081 |
spellingShingle |
K01 - Foresterie - Considérations générales P33 - Chimie et physique du sol F60 - Physiologie et biochimie végétale forêt forêt tropicale sol de forêt litière forestière respiration du sol écosystème forestier dégradation cycle du carbone racine composition chimique biologie du sol Houppier http://aims.fao.org/aos/agrovoc/c_3062 http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_3051 http://aims.fao.org/aos/agrovoc/c_3047 http://aims.fao.org/aos/agrovoc/c_33553 http://aims.fao.org/aos/agrovoc/c_1374842133961 http://aims.fao.org/aos/agrovoc/c_2159 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_6651 http://aims.fao.org/aos/agrovoc/c_1794 http://aims.fao.org/aos/agrovoc/c_7160 http://aims.fao.org/aos/agrovoc/c_16172 http://aims.fao.org/aos/agrovoc/c_3093 http://aims.fao.org/aos/agrovoc/c_3081 K01 - Foresterie - Considérations générales P33 - Chimie et physique du sol F60 - Physiologie et biochimie végétale forêt forêt tropicale sol de forêt litière forestière respiration du sol écosystème forestier dégradation cycle du carbone racine composition chimique biologie du sol Houppier http://aims.fao.org/aos/agrovoc/c_3062 http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_3051 http://aims.fao.org/aos/agrovoc/c_3047 http://aims.fao.org/aos/agrovoc/c_33553 http://aims.fao.org/aos/agrovoc/c_1374842133961 http://aims.fao.org/aos/agrovoc/c_2159 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_6651 http://aims.fao.org/aos/agrovoc/c_1794 http://aims.fao.org/aos/agrovoc/c_7160 http://aims.fao.org/aos/agrovoc/c_16172 http://aims.fao.org/aos/agrovoc/c_3093 http://aims.fao.org/aos/agrovoc/c_3081 Bréchet, Laëtitia Le Dantec, Valérie Ponton, Stéphane Goret, Jean-Yves Sayer, Emma Bonal, Damien Freycon, Vincent Roy, Jacques Epron, Daniel Short- and long-term influence of litter quality and quantity on simulated heterotrophic soil respiration in a lowland tropical forest |
description |
Heterotrophic soil respiration (SRH) alone can contribute up to 50% of total ecosystem respiration in tropical forests. Whereas the abiotic controls of SRH have been extensively studied, the influence of plant traits is less well characterised. We used field experiments and a modelling approach to test the relative influence of plant traits on SRH in lowland tropical forest in French Guiana. We measured leaf- and root litter traits for five common tree species and conducted a root decomposition experiment to evaluate the influence of root chemistry on decay rates. We measured SRH in trenched plots and used our field measurements to parameterize and test the Century model of soil C dynamics. Overall, the Century model performed well in simulating SRH, and species-specific root decomposition in Century corresponded well to decomposition rates measured in situ. Root litter characterized by low lignin-to-nitrogen ratios decomposed more rapidly than low-quality root litter during the first 6 months. Model runs over different time scales revealed that litter quality substantially influenced SRH on an annual time-scale by determining the rates of root- and leaf litter decomposition. However, litter mass had an overriding influence on SRH over the longer term in 20-year model runs. Synthesis Using simple plant trait data to parameterise the Century model, we were able to accurately simulate changes in SRH in a lowland tropical forest. Our results suggest that this approach could be used to predict changes in tropical soil C dynamics under global change scenarios by including data on changes in plant productivity and C inputs to the soil (for example litterfall and root turnover). |
format |
article |
topic_facet |
K01 - Foresterie - Considérations générales P33 - Chimie et physique du sol F60 - Physiologie et biochimie végétale forêt forêt tropicale sol de forêt litière forestière respiration du sol écosystème forestier dégradation cycle du carbone racine composition chimique biologie du sol Houppier http://aims.fao.org/aos/agrovoc/c_3062 http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_3051 http://aims.fao.org/aos/agrovoc/c_3047 http://aims.fao.org/aos/agrovoc/c_33553 http://aims.fao.org/aos/agrovoc/c_1374842133961 http://aims.fao.org/aos/agrovoc/c_2159 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_6651 http://aims.fao.org/aos/agrovoc/c_1794 http://aims.fao.org/aos/agrovoc/c_7160 http://aims.fao.org/aos/agrovoc/c_16172 http://aims.fao.org/aos/agrovoc/c_3093 http://aims.fao.org/aos/agrovoc/c_3081 |
author |
Bréchet, Laëtitia Le Dantec, Valérie Ponton, Stéphane Goret, Jean-Yves Sayer, Emma Bonal, Damien Freycon, Vincent Roy, Jacques Epron, Daniel |
author_facet |
Bréchet, Laëtitia Le Dantec, Valérie Ponton, Stéphane Goret, Jean-Yves Sayer, Emma Bonal, Damien Freycon, Vincent Roy, Jacques Epron, Daniel |
author_sort |
Bréchet, Laëtitia |
title |
Short- and long-term influence of litter quality and quantity on simulated heterotrophic soil respiration in a lowland tropical forest |
title_short |
Short- and long-term influence of litter quality and quantity on simulated heterotrophic soil respiration in a lowland tropical forest |
title_full |
Short- and long-term influence of litter quality and quantity on simulated heterotrophic soil respiration in a lowland tropical forest |
title_fullStr |
Short- and long-term influence of litter quality and quantity on simulated heterotrophic soil respiration in a lowland tropical forest |
title_full_unstemmed |
Short- and long-term influence of litter quality and quantity on simulated heterotrophic soil respiration in a lowland tropical forest |
title_sort |
short- and long-term influence of litter quality and quantity on simulated heterotrophic soil respiration in a lowland tropical forest |
url |
http://agritrop.cirad.fr/583492/ http://agritrop.cirad.fr/583492/7/s10021-016-0104-x.pdf |
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