To what extent are greenhouse-gas emissions offset by trees in a Sahelian silvopastoral system?
To assess the extent to which trees in a semi-arid silvopastoral system (SPS) can offset the greenhouse-gas (GHG) emissions of the system's livestock, this study used two process-based models (STEP-GENDEC-N2O and DynACof) to simulate 9 years of agricultural activity and resulting emissions in a SPS that has been operating in sahelian Senegal. STEP-GENDEC-N2O simulated soil N2O and CO2 fluxes, plus growth of the herbaceous layer, while DynACof focused on the tree layer. Outputs from the models included simulated time series of vegetative growth, water fluxes, and emissions. This output was validated through the use of published data, and measurements that were made at the SPS. Overall, the outputs from STEP-GENDEC-N2O agreed well with validation data for water fluxes, soil N, soil C, herbaceous biomass, and N2O emissions. Good agreement was also found between the measured fluxes of the SPS ecosystem, and the simulated values that were generated by combining STEP-GENDEC-N2O's simulations (of the herbaceous layer's heterotrophic respiration, autotrophic respiration, and gross primary productivity (GPP)) with DynACof's simulations of the tree layer's autotrophic respiration and GPP. Among the insights gained from the simulations was that in this SPS's sandy soils, nitrification was the dominant process that leads to N2O emissions. Our results show that the trees, at their current density (81 ha−1) offset 18 % to 41 % of the GHG emissions from livestock. With further development, the model set-up can be used for estimating the GHG offset at other tree densities, and will be useful for guiding future policies regarding climate-change adaptation and mitigation in the management of the Sahel's SPSs.
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dig-cirad-fr-608568 |
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Europa del Oeste |
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Biblioteca del CIRAD Francia |
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P40 - Météorologie et climatologie F08 - Systèmes et modes de culture L01 - Élevage - Considérations générales modèle de simulation séquestration du carbone changement climatique agroforesterie gaz à effet de serre système sylvopastoral évaluation de l'impact atténuation des effets du changement climatique cycle du carbone matière organique du sol http://aims.fao.org/aos/agrovoc/c_24242 http://aims.fao.org/aos/agrovoc/c_331583 http://aims.fao.org/aos/agrovoc/c_1666 http://aims.fao.org/aos/agrovoc/c_207 http://aims.fao.org/aos/agrovoc/c_34841 http://aims.fao.org/aos/agrovoc/c_16097 http://aims.fao.org/aos/agrovoc/c_37938 http://aims.fao.org/aos/agrovoc/c_1374571087594 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_35657 http://aims.fao.org/aos/agrovoc/c_6970 http://aims.fao.org/aos/agrovoc/c_6734 P40 - Météorologie et climatologie F08 - Systèmes et modes de culture L01 - Élevage - Considérations générales modèle de simulation séquestration du carbone changement climatique agroforesterie gaz à effet de serre système sylvopastoral évaluation de l'impact atténuation des effets du changement climatique cycle du carbone matière organique du sol http://aims.fao.org/aos/agrovoc/c_24242 http://aims.fao.org/aos/agrovoc/c_331583 http://aims.fao.org/aos/agrovoc/c_1666 http://aims.fao.org/aos/agrovoc/c_207 http://aims.fao.org/aos/agrovoc/c_34841 http://aims.fao.org/aos/agrovoc/c_16097 http://aims.fao.org/aos/agrovoc/c_37938 http://aims.fao.org/aos/agrovoc/c_1374571087594 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_35657 http://aims.fao.org/aos/agrovoc/c_6970 http://aims.fao.org/aos/agrovoc/c_6734 |
spellingShingle |
P40 - Météorologie et climatologie F08 - Systèmes et modes de culture L01 - Élevage - Considérations générales modèle de simulation séquestration du carbone changement climatique agroforesterie gaz à effet de serre système sylvopastoral évaluation de l'impact atténuation des effets du changement climatique cycle du carbone matière organique du sol http://aims.fao.org/aos/agrovoc/c_24242 http://aims.fao.org/aos/agrovoc/c_331583 http://aims.fao.org/aos/agrovoc/c_1666 http://aims.fao.org/aos/agrovoc/c_207 http://aims.fao.org/aos/agrovoc/c_34841 http://aims.fao.org/aos/agrovoc/c_16097 http://aims.fao.org/aos/agrovoc/c_37938 http://aims.fao.org/aos/agrovoc/c_1374571087594 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_35657 http://aims.fao.org/aos/agrovoc/c_6970 http://aims.fao.org/aos/agrovoc/c_6734 P40 - Météorologie et climatologie F08 - Systèmes et modes de culture L01 - Élevage - Considérations générales modèle de simulation séquestration du carbone changement climatique agroforesterie gaz à effet de serre système sylvopastoral évaluation de l'impact atténuation des effets du changement climatique cycle du carbone matière organique du sol http://aims.fao.org/aos/agrovoc/c_24242 http://aims.fao.org/aos/agrovoc/c_331583 http://aims.fao.org/aos/agrovoc/c_1666 http://aims.fao.org/aos/agrovoc/c_207 http://aims.fao.org/aos/agrovoc/c_34841 http://aims.fao.org/aos/agrovoc/c_16097 http://aims.fao.org/aos/agrovoc/c_37938 http://aims.fao.org/aos/agrovoc/c_1374571087594 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_35657 http://aims.fao.org/aos/agrovoc/c_6970 http://aims.fao.org/aos/agrovoc/c_6734 Agbohessou, Yélognissè Frédi Delon, Claire Mougin, Eric Grippa, Manuela Tagesson, Torbern Diedhiou, Moussa Ba, Seydina Ngom, Daouda Vezy, Rémi Ndiaye, Ousmane Assouma, Mohamed Habibou Diawara, Mamadou Oumar Roupsard, Olivier To what extent are greenhouse-gas emissions offset by trees in a Sahelian silvopastoral system? |
description |
To assess the extent to which trees in a semi-arid silvopastoral system (SPS) can offset the greenhouse-gas (GHG) emissions of the system's livestock, this study used two process-based models (STEP-GENDEC-N2O and DynACof) to simulate 9 years of agricultural activity and resulting emissions in a SPS that has been operating in sahelian Senegal. STEP-GENDEC-N2O simulated soil N2O and CO2 fluxes, plus growth of the herbaceous layer, while DynACof focused on the tree layer. Outputs from the models included simulated time series of vegetative growth, water fluxes, and emissions. This output was validated through the use of published data, and measurements that were made at the SPS. Overall, the outputs from STEP-GENDEC-N2O agreed well with validation data for water fluxes, soil N, soil C, herbaceous biomass, and N2O emissions. Good agreement was also found between the measured fluxes of the SPS ecosystem, and the simulated values that were generated by combining STEP-GENDEC-N2O's simulations (of the herbaceous layer's heterotrophic respiration, autotrophic respiration, and gross primary productivity (GPP)) with DynACof's simulations of the tree layer's autotrophic respiration and GPP. Among the insights gained from the simulations was that in this SPS's sandy soils, nitrification was the dominant process that leads to N2O emissions. Our results show that the trees, at their current density (81 ha−1) offset 18 % to 41 % of the GHG emissions from livestock. With further development, the model set-up can be used for estimating the GHG offset at other tree densities, and will be useful for guiding future policies regarding climate-change adaptation and mitigation in the management of the Sahel's SPSs. |
format |
article |
topic_facet |
P40 - Météorologie et climatologie F08 - Systèmes et modes de culture L01 - Élevage - Considérations générales modèle de simulation séquestration du carbone changement climatique agroforesterie gaz à effet de serre système sylvopastoral évaluation de l'impact atténuation des effets du changement climatique cycle du carbone matière organique du sol http://aims.fao.org/aos/agrovoc/c_24242 http://aims.fao.org/aos/agrovoc/c_331583 http://aims.fao.org/aos/agrovoc/c_1666 http://aims.fao.org/aos/agrovoc/c_207 http://aims.fao.org/aos/agrovoc/c_34841 http://aims.fao.org/aos/agrovoc/c_16097 http://aims.fao.org/aos/agrovoc/c_37938 http://aims.fao.org/aos/agrovoc/c_1374571087594 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_35657 http://aims.fao.org/aos/agrovoc/c_6970 http://aims.fao.org/aos/agrovoc/c_6734 |
author |
Agbohessou, Yélognissè Frédi Delon, Claire Mougin, Eric Grippa, Manuela Tagesson, Torbern Diedhiou, Moussa Ba, Seydina Ngom, Daouda Vezy, Rémi Ndiaye, Ousmane Assouma, Mohamed Habibou Diawara, Mamadou Oumar Roupsard, Olivier |
author_facet |
Agbohessou, Yélognissè Frédi Delon, Claire Mougin, Eric Grippa, Manuela Tagesson, Torbern Diedhiou, Moussa Ba, Seydina Ngom, Daouda Vezy, Rémi Ndiaye, Ousmane Assouma, Mohamed Habibou Diawara, Mamadou Oumar Roupsard, Olivier |
author_sort |
Agbohessou, Yélognissè Frédi |
title |
To what extent are greenhouse-gas emissions offset by trees in a Sahelian silvopastoral system? |
title_short |
To what extent are greenhouse-gas emissions offset by trees in a Sahelian silvopastoral system? |
title_full |
To what extent are greenhouse-gas emissions offset by trees in a Sahelian silvopastoral system? |
title_fullStr |
To what extent are greenhouse-gas emissions offset by trees in a Sahelian silvopastoral system? |
title_full_unstemmed |
To what extent are greenhouse-gas emissions offset by trees in a Sahelian silvopastoral system? |
title_sort |
to what extent are greenhouse-gas emissions offset by trees in a sahelian silvopastoral system? |
url |
http://agritrop.cirad.fr/608568/ http://agritrop.cirad.fr/608568/1/ID608568.pdf |
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dig-cirad-fr-6085682024-02-28T15:02:40Z http://agritrop.cirad.fr/608568/ http://agritrop.cirad.fr/608568/ To what extent are greenhouse-gas emissions offset by trees in a Sahelian silvopastoral system? Agbohessou Yélognissè Frédi, Delon Claire, Mougin Eric, Grippa Manuela, Tagesson Torbern, Diedhiou Moussa, Ba Seydina, Ngom Daouda, Vezy Rémi, Ndiaye Ousmane, Assouma Mohamed Habibou, Diawara Mamadou Oumar, Roupsard Olivier. 2023. Agricultural and Forest Meteorology, 343:109780, 14 p.https://doi.org/10.1016/j.agrformet.2023.109780 <https://doi.org/10.1016/j.agrformet.2023.109780> To what extent are greenhouse-gas emissions offset by trees in a Sahelian silvopastoral system? Agbohessou, Yélognissè Frédi Delon, Claire Mougin, Eric Grippa, Manuela Tagesson, Torbern Diedhiou, Moussa Ba, Seydina Ngom, Daouda Vezy, Rémi Ndiaye, Ousmane Assouma, Mohamed Habibou Diawara, Mamadou Oumar Roupsard, Olivier eng 2023 Agricultural and Forest Meteorology P40 - Météorologie et climatologie F08 - Systèmes et modes de culture L01 - Élevage - Considérations générales modèle de simulation séquestration du carbone changement climatique agroforesterie gaz à effet de serre système sylvopastoral évaluation de l'impact atténuation des effets du changement climatique cycle du carbone matière organique du sol http://aims.fao.org/aos/agrovoc/c_24242 http://aims.fao.org/aos/agrovoc/c_331583 http://aims.fao.org/aos/agrovoc/c_1666 http://aims.fao.org/aos/agrovoc/c_207 http://aims.fao.org/aos/agrovoc/c_34841 http://aims.fao.org/aos/agrovoc/c_16097 http://aims.fao.org/aos/agrovoc/c_37938 http://aims.fao.org/aos/agrovoc/c_1374571087594 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_35657 Sénégal Sahel http://aims.fao.org/aos/agrovoc/c_6970 http://aims.fao.org/aos/agrovoc/c_6734 To assess the extent to which trees in a semi-arid silvopastoral system (SPS) can offset the greenhouse-gas (GHG) emissions of the system's livestock, this study used two process-based models (STEP-GENDEC-N2O and DynACof) to simulate 9 years of agricultural activity and resulting emissions in a SPS that has been operating in sahelian Senegal. STEP-GENDEC-N2O simulated soil N2O and CO2 fluxes, plus growth of the herbaceous layer, while DynACof focused on the tree layer. Outputs from the models included simulated time series of vegetative growth, water fluxes, and emissions. This output was validated through the use of published data, and measurements that were made at the SPS. Overall, the outputs from STEP-GENDEC-N2O agreed well with validation data for water fluxes, soil N, soil C, herbaceous biomass, and N2O emissions. Good agreement was also found between the measured fluxes of the SPS ecosystem, and the simulated values that were generated by combining STEP-GENDEC-N2O's simulations (of the herbaceous layer's heterotrophic respiration, autotrophic respiration, and gross primary productivity (GPP)) with DynACof's simulations of the tree layer's autotrophic respiration and GPP. Among the insights gained from the simulations was that in this SPS's sandy soils, nitrification was the dominant process that leads to N2O emissions. Our results show that the trees, at their current density (81 ha−1) offset 18 % to 41 % of the GHG emissions from livestock. With further development, the model set-up can be used for estimating the GHG offset at other tree densities, and will be useful for guiding future policies regarding climate-change adaptation and mitigation in the management of the Sahel's SPSs. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/608568/1/ID608568.pdf text Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1016/j.agrformet.2023.109780 10.1016/j.agrformet.2023.109780 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.agrformet.2023.109780 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1016/j.agrformet.2023.109780 info:eu-repo/grantAgreement/EC/H2020///(EU) Sequestration and Green-house Gas Emissions in (Agro) Sylvopastoral Ecosystems in the Sahelian CILSS States/CaSSECS info:eu-repo/grantAgreement/EC/H2020///(EU) Development Smart Innovation through Research in Agriculture/DeSIRA |