Precipitation as driver of carbon fluxes in 11 African ecosystems
This study reports carbon and water fluxes between the land surface and atmosphere in eleven different ecosystems types in Sub-Saharan Africa, as measured using eddy covariance (EC) technology in the first two years of the CarboAfrica network operation. The ecosystems for which data were available ranged in mean annual rainfall from 320mm (Sudan) to 1150mm (Republic of Congo) and include a spectrum of vegetation types (or land cover) (open savannas, woodlands, croplands and grasslands). Given the shortness of the record, the EC data were analysed across the network rather than longitudinally at sites, in order to understand the driving factors for ecosystem respiration and carbon assimilation, and to reveal the different water use strategies in these highly seasonal environments. Correspondence to: L. Merbold (lmerbold@bgc-jena.mpg.de) Values for maximum net carbon assimilation rates (photosynthesis) ranged from -12.5^molCO2 m-2 s-1 in a dry, open Millet cropland (C4-plants) up to -48^molCO2 m-2 s-1 for a tropical moist grassland. Maximum carbon assimilation rates were highly correlated with mean annual rainfall (r2=0.74). Maximum photosynthetic uptake rates (Fpmax) were positively related to satellite-derived fAPAR. Ecosystem respiration was dependent on temperature at all sites, and was additionally dependent on soil water content at sites receiving less than 1000mm of rain per year. All included ecosystems dominated by C3-plants, showed a strong decrease in 30-min assimilation rates with increasing water vapour pressure deficit above 2.0 kPa.
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Subjects: | P40 - Météorologie et climatologie, F62 - Physiologie végétale - Croissance et développement, F40 - Écologie végétale, cycle du carbone, bilan hydrique, écosystème, http://aims.fao.org/aos/agrovoc/c_17299, http://aims.fao.org/aos/agrovoc/c_8311, http://aims.fao.org/aos/agrovoc/c_2482, http://aims.fao.org/aos/agrovoc/c_166, |
Online Access: | http://agritrop.cirad.fr/551791/ http://agritrop.cirad.fr/551791/1/document_551791.pdf |
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dig-cirad-fr-5517912024-01-28T17:43:02Z http://agritrop.cirad.fr/551791/ http://agritrop.cirad.fr/551791/ Precipitation as driver of carbon fluxes in 11 African ecosystems. Merbold L., Ardö Junas, Arneth Almur, Scholes Robert J., Nouvellon Yann, De Grandcourt Agnès, Archibald S., Bonnefond Jean-Marc, Boulain N., Brueggemann N., Bruemmer C., Cappelaere Bernard, Ceschia Eric, El-Khidir H.A.M., El-Tahir B.A., Falk U., Lloyd Jon, Kergoat Laurent, Le Dantec Valérie, Mougin Eric, Muchinda M., Mukelabai M.M., Ramier D., Roupsard Olivier, Timouk F., Veenendaal Elmar M., Kutsch Werner L.. 2009. Biogeosciences, 6 (6) : 1027-1041.https://doi.org/10.5194/bg-6-1027-2009 <https://doi.org/10.5194/bg-6-1027-2009> Precipitation as driver of carbon fluxes in 11 African ecosystems Merbold, L. Ardö, Junas Arneth, Almur Scholes, Robert J. Nouvellon, Yann De Grandcourt, Agnès Archibald, S. Bonnefond, Jean-Marc Boulain, N. Brueggemann, N. Bruemmer, C. Cappelaere, Bernard Ceschia, Eric El-Khidir, H.A.M. El-Tahir, B.A. Falk, U. Lloyd, Jon Kergoat, Laurent Le Dantec, Valérie Mougin, Eric Muchinda, M. Mukelabai, M.M. Ramier, D. Roupsard, Olivier Timouk, F. Veenendaal, Elmar M. Kutsch, Werner L. eng 2009 Biogeosciences P40 - Météorologie et climatologie F62 - Physiologie végétale - Croissance et développement F40 - Écologie végétale cycle du carbone bilan hydrique écosystème http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_8311 http://aims.fao.org/aos/agrovoc/c_2482 Afrique au sud du Sahara http://aims.fao.org/aos/agrovoc/c_166 This study reports carbon and water fluxes between the land surface and atmosphere in eleven different ecosystems types in Sub-Saharan Africa, as measured using eddy covariance (EC) technology in the first two years of the CarboAfrica network operation. The ecosystems for which data were available ranged in mean annual rainfall from 320mm (Sudan) to 1150mm (Republic of Congo) and include a spectrum of vegetation types (or land cover) (open savannas, woodlands, croplands and grasslands). Given the shortness of the record, the EC data were analysed across the network rather than longitudinally at sites, in order to understand the driving factors for ecosystem respiration and carbon assimilation, and to reveal the different water use strategies in these highly seasonal environments. Correspondence to: L. Merbold (lmerbold@bgc-jena.mpg.de) Values for maximum net carbon assimilation rates (photosynthesis) ranged from -12.5^molCO2 m-2 s-1 in a dry, open Millet cropland (C4-plants) up to -48^molCO2 m-2 s-1 for a tropical moist grassland. Maximum carbon assimilation rates were highly correlated with mean annual rainfall (r2=0.74). Maximum photosynthetic uptake rates (Fpmax) were positively related to satellite-derived fAPAR. Ecosystem respiration was dependent on temperature at all sites, and was additionally dependent on soil water content at sites receiving less than 1000mm of rain per year. All included ecosystems dominated by C3-plants, showed a strong decrease in 30-min assimilation rates with increasing water vapour pressure deficit above 2.0 kPa. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/551791/1/document_551791.pdf application/pdf Cirad license info:eu-repo/semantics/openAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.5194/bg-6-1027-2009 10.5194/bg-6-1027-2009 http://catalogue-bibliotheques.cirad.fr/cgi-bin/koha/opac-detail.pl?biblionumber=206250 info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-6-1027-2009 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.5194/bg-6-1027-2009 |
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P40 - Météorologie et climatologie F62 - Physiologie végétale - Croissance et développement F40 - Écologie végétale cycle du carbone bilan hydrique écosystème http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_8311 http://aims.fao.org/aos/agrovoc/c_2482 http://aims.fao.org/aos/agrovoc/c_166 P40 - Météorologie et climatologie F62 - Physiologie végétale - Croissance et développement F40 - Écologie végétale cycle du carbone bilan hydrique écosystème http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_8311 http://aims.fao.org/aos/agrovoc/c_2482 http://aims.fao.org/aos/agrovoc/c_166 |
spellingShingle |
P40 - Météorologie et climatologie F62 - Physiologie végétale - Croissance et développement F40 - Écologie végétale cycle du carbone bilan hydrique écosystème http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_8311 http://aims.fao.org/aos/agrovoc/c_2482 http://aims.fao.org/aos/agrovoc/c_166 P40 - Météorologie et climatologie F62 - Physiologie végétale - Croissance et développement F40 - Écologie végétale cycle du carbone bilan hydrique écosystème http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_8311 http://aims.fao.org/aos/agrovoc/c_2482 http://aims.fao.org/aos/agrovoc/c_166 Merbold, L. Ardö, Junas Arneth, Almur Scholes, Robert J. Nouvellon, Yann De Grandcourt, Agnès Archibald, S. Bonnefond, Jean-Marc Boulain, N. Brueggemann, N. Bruemmer, C. Cappelaere, Bernard Ceschia, Eric El-Khidir, H.A.M. El-Tahir, B.A. Falk, U. Lloyd, Jon Kergoat, Laurent Le Dantec, Valérie Mougin, Eric Muchinda, M. Mukelabai, M.M. Ramier, D. Roupsard, Olivier Timouk, F. Veenendaal, Elmar M. Kutsch, Werner L. Precipitation as driver of carbon fluxes in 11 African ecosystems |
description |
This study reports carbon and water fluxes between the land surface and atmosphere in eleven different ecosystems types in Sub-Saharan Africa, as measured using eddy covariance (EC) technology in the first two years of the CarboAfrica network operation. The ecosystems for which data were available ranged in mean annual rainfall from 320mm (Sudan) to 1150mm (Republic of Congo) and include a spectrum of vegetation types (or land cover) (open savannas, woodlands, croplands and grasslands). Given the shortness of the record, the EC data were analysed across the network rather than longitudinally at sites, in order to understand the driving factors for ecosystem respiration and carbon assimilation, and to reveal the different water use strategies in these highly seasonal environments. Correspondence to: L. Merbold (lmerbold@bgc-jena.mpg.de) Values for maximum net carbon assimilation rates (photosynthesis) ranged from -12.5^molCO2 m-2 s-1 in a dry, open Millet cropland (C4-plants) up to -48^molCO2 m-2 s-1 for a tropical moist grassland. Maximum carbon assimilation rates were highly correlated with mean annual rainfall (r2=0.74). Maximum photosynthetic uptake rates (Fpmax) were positively related to satellite-derived fAPAR. Ecosystem respiration was dependent on temperature at all sites, and was additionally dependent on soil water content at sites receiving less than 1000mm of rain per year. All included ecosystems dominated by C3-plants, showed a strong decrease in 30-min assimilation rates with increasing water vapour pressure deficit above 2.0 kPa. |
format |
article |
topic_facet |
P40 - Météorologie et climatologie F62 - Physiologie végétale - Croissance et développement F40 - Écologie végétale cycle du carbone bilan hydrique écosystème http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_8311 http://aims.fao.org/aos/agrovoc/c_2482 http://aims.fao.org/aos/agrovoc/c_166 |
author |
Merbold, L. Ardö, Junas Arneth, Almur Scholes, Robert J. Nouvellon, Yann De Grandcourt, Agnès Archibald, S. Bonnefond, Jean-Marc Boulain, N. Brueggemann, N. Bruemmer, C. Cappelaere, Bernard Ceschia, Eric El-Khidir, H.A.M. El-Tahir, B.A. Falk, U. Lloyd, Jon Kergoat, Laurent Le Dantec, Valérie Mougin, Eric Muchinda, M. Mukelabai, M.M. Ramier, D. Roupsard, Olivier Timouk, F. Veenendaal, Elmar M. Kutsch, Werner L. |
author_facet |
Merbold, L. Ardö, Junas Arneth, Almur Scholes, Robert J. Nouvellon, Yann De Grandcourt, Agnès Archibald, S. Bonnefond, Jean-Marc Boulain, N. Brueggemann, N. Bruemmer, C. Cappelaere, Bernard Ceschia, Eric El-Khidir, H.A.M. El-Tahir, B.A. Falk, U. Lloyd, Jon Kergoat, Laurent Le Dantec, Valérie Mougin, Eric Muchinda, M. Mukelabai, M.M. Ramier, D. Roupsard, Olivier Timouk, F. Veenendaal, Elmar M. Kutsch, Werner L. |
author_sort |
Merbold, L. |
title |
Precipitation as driver of carbon fluxes in 11 African ecosystems |
title_short |
Precipitation as driver of carbon fluxes in 11 African ecosystems |
title_full |
Precipitation as driver of carbon fluxes in 11 African ecosystems |
title_fullStr |
Precipitation as driver of carbon fluxes in 11 African ecosystems |
title_full_unstemmed |
Precipitation as driver of carbon fluxes in 11 African ecosystems |
title_sort |
precipitation as driver of carbon fluxes in 11 african ecosystems |
url |
http://agritrop.cirad.fr/551791/ http://agritrop.cirad.fr/551791/1/document_551791.pdf |
work_keys_str_mv |
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