Understanding N2O emissions in African ecosystems: Assessments from a semi-arid Savanna grassland in Senegal and sub-tropical agricultural fields in Kenya
This study is based on the analysis of field-measured nitrous oxide (N2O) emissions from a Sahelian semi-arid grassland site in Senegal (Dahra), tropical humid agricultural plots in Kenya (Mbita region) and simulations using a 1D model designed for semi arid ecosystems in Dahra. This study aims at i...
| Autores principales: | , , , , , , , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
MDPI
2020
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/125069 |
| _version_ | 1855543302638534656 |
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| author | Bigaignon, L Delon, C Ndiaye, O Galy-Lacaux, C Serça, D Guérin, F Tallec, T Merbold, Lutz Tagesson, T Fensholt, R André, A Galliau, S |
| author_browse | André, A Bigaignon, L Delon, C Fensholt, R Galliau, S Galy-Lacaux, C Guérin, F Merbold, Lutz Ndiaye, O Serça, D Tagesson, T Tallec, T |
| author_facet | Bigaignon, L Delon, C Ndiaye, O Galy-Lacaux, C Serça, D Guérin, F Tallec, T Merbold, Lutz Tagesson, T Fensholt, R André, A Galliau, S |
| author_sort | Bigaignon, L |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | This study is based on the analysis of field-measured nitrous oxide (N2O) emissions from a Sahelian semi-arid grassland site in Senegal (Dahra), tropical humid agricultural plots in Kenya (Mbita region) and simulations using a 1D model designed for semi arid ecosystems in Dahra. This study aims at improving present knowledge and inventories of N2O emissions from the African continent. N2O emissions were larger at the agricultural sites in the Mbita region (range: 0.0 ± 0.0 to 42.1 ± 10.7 ngN m−2 s−1) than at the Dahra site (range: 0.3 ± 0 to 7.4 ± 6.5 ngN m−2 s−1). Soil water and nitrate (NO3−) contents appeared to be the most important drivers of N2O emissions in Dahra at the seasonal scale in both regions. The seasonal pattern of modelled N2O emissions is well represented, though the model performed better during the rainy season than between the rainy and dry seasons. This study highlighted that the water-filled pore space threshold recognised as a trigger for N2O emissions should be reconsidered for semi-arid ecosystems. Based on both measurements and simulated results, an annual N2O budget was estimated for African savanna/grassland and agricultural land ranging between 0.17–0.26 and 1.15–1.20 TgN per year, respectively. |
| format | Journal Article |
| id | CGSpace125069 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | MDPI |
| publisherStr | MDPI |
| record_format | dspace |
| spelling | CGSpace1250692025-12-08T09:54:28Z Understanding N2O emissions in African ecosystems: Assessments from a semi-arid Savanna grassland in Senegal and sub-tropical agricultural fields in Kenya Bigaignon, L Delon, C Ndiaye, O Galy-Lacaux, C Serça, D Guérin, F Tallec, T Merbold, Lutz Tagesson, T Fensholt, R André, A Galliau, S nitrous oxide savannahs grasslands This study is based on the analysis of field-measured nitrous oxide (N2O) emissions from a Sahelian semi-arid grassland site in Senegal (Dahra), tropical humid agricultural plots in Kenya (Mbita region) and simulations using a 1D model designed for semi arid ecosystems in Dahra. This study aims at improving present knowledge and inventories of N2O emissions from the African continent. N2O emissions were larger at the agricultural sites in the Mbita region (range: 0.0 ± 0.0 to 42.1 ± 10.7 ngN m−2 s−1) than at the Dahra site (range: 0.3 ± 0 to 7.4 ± 6.5 ngN m−2 s−1). Soil water and nitrate (NO3−) contents appeared to be the most important drivers of N2O emissions in Dahra at the seasonal scale in both regions. The seasonal pattern of modelled N2O emissions is well represented, though the model performed better during the rainy season than between the rainy and dry seasons. This study highlighted that the water-filled pore space threshold recognised as a trigger for N2O emissions should be reconsidered for semi-arid ecosystems. Based on both measurements and simulated results, an annual N2O budget was estimated for African savanna/grassland and agricultural land ranging between 0.17–0.26 and 1.15–1.20 TgN per year, respectively. 2020-11-01 2022-10-18T05:48:05Z 2022-10-18T05:48:05Z Journal Article https://hdl.handle.net/10568/125069 en Open Access MDPI Bigaignon, L., Delon, C., Ndiaye, O., Galy-Lacaux, C., Serça, D., Guérin, F., Tallec, T., Merbold, L., Tagesson, T., Fensholt, R., André, S. and Galliau, S. 2020. Understanding N2O emissions in African ecosystems: Assessments from a semi-arid Savanna grassland in Senegal and sub-tropical agricultural fields in Kenya. Sustainability 12(21):8875. |
| spellingShingle | nitrous oxide savannahs grasslands Bigaignon, L Delon, C Ndiaye, O Galy-Lacaux, C Serça, D Guérin, F Tallec, T Merbold, Lutz Tagesson, T Fensholt, R André, A Galliau, S Understanding N2O emissions in African ecosystems: Assessments from a semi-arid Savanna grassland in Senegal and sub-tropical agricultural fields in Kenya |
| title | Understanding N2O emissions in African ecosystems: Assessments from a semi-arid Savanna grassland in Senegal and sub-tropical agricultural fields in Kenya |
| title_full | Understanding N2O emissions in African ecosystems: Assessments from a semi-arid Savanna grassland in Senegal and sub-tropical agricultural fields in Kenya |
| title_fullStr | Understanding N2O emissions in African ecosystems: Assessments from a semi-arid Savanna grassland in Senegal and sub-tropical agricultural fields in Kenya |
| title_full_unstemmed | Understanding N2O emissions in African ecosystems: Assessments from a semi-arid Savanna grassland in Senegal and sub-tropical agricultural fields in Kenya |
| title_short | Understanding N2O emissions in African ecosystems: Assessments from a semi-arid Savanna grassland in Senegal and sub-tropical agricultural fields in Kenya |
| title_sort | understanding n2o emissions in african ecosystems assessments from a semi arid savanna grassland in senegal and sub tropical agricultural fields in kenya |
| topic | nitrous oxide savannahs grasslands |
| url | https://hdl.handle.net/10568/125069 |
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