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Contrasted seasonal balances in a Sahelian pastoral ecosystem result in a neutral annual carbon balance
- Source :
- Journal of Arid Environments, Journal of Arid Environments, 2019, 162, pp.62-73. ⟨10.1016/j.jaridenv.2018.11.013⟩, Journal of Arid Environments, Elsevier, 2019, 162, pp.62-73. ⟨10.1016/j.jaridenv.2018.11.013⟩
- Publication Year :
- 2019
-
Abstract
- International audience; This paper explores an original approach in which greenhouse gas (GHG) emissions and carbon (C) accumulation are assessed monthly and at landscape scale to account for the highly seasonal monsoon climate and the mobility of pastoral herds that characterize West African pastoral ecosystems. The study was conducted in northern Senegal, in the service area of the Widou Thiengoly borehole, a circular zone of 706 km(2) centered on the borehole. The C balance was calculated using an ecosystem approach, i.e. taking all main sources of GHG emissions and C sinks of the ecosystem, not only anthropogenic sources, into account. The annual C balance of the pastoral ecosystem was -0.04 +/- 0.01 tC-eq.ha(-1).year(-1), showing that total GHG emissions were mitigated by C accumulation in trees, soil and livestock. The C balance varied considerably with the seasons, with a positive monthly balance in the wet season, from July to October (+ 0.58 tC-eq.ha(-1).month(-1)) and a negative monthly balance in the cold dry season from November to February and the hot dry season from March to June (- 0.57 and -0.05 tC-eq.ha(-1).month(-1) respectively). Care should be taken when generalizing these results, which were obtained in a dry year, because of strong inter-annual variations in rainfall.
- Subjects :
- 0106 biological sciences
010504 meteorology & atmospheric sciences
[SDV]Life Sciences [q-bio]
F08 - Systèmes et modes de culture
Atmospheric sciences
01 natural sciences
ghg emissions
[SHS]Humanities and Social Sciences
Dry season
C sequestration
2. Zero hunger
Ecology
Senegal
GHG emissions
séquestration du carbone
Variation saisonnière
ecosystem functioning
Livestock
Gaz à effet de serre
Écosystème
Wet season
ecosystem approaches [EN]
P40 - Météorologie et climatologie
Borehole
Monsoon
010603 evolutionary biology
Système d'élevage
senegal
Ecosystem
Landscape
[INFO]Computer Science [cs]
Pastoralisme
Ecology, Evolution, Behavior and Systematics
0105 earth and related environmental sciences
Earth-Surface Processes
business.industry
c sequestration
L01 - Élevage - Considérations générales
15. Life on land
landscape
Balance (accounting)
13. Climate action
Greenhouse gas
Ecosystem functioning
Environmental science
business
Subjects
Details
- Language :
- English
- ISSN :
- 01401963 and 1095922X
- Database :
- OpenAIRE
- Journal :
- Journal of Arid Environments, Journal of Arid Environments, 2019, 162, pp.62-73. ⟨10.1016/j.jaridenv.2018.11.013⟩, Journal of Arid Environments, Elsevier, 2019, 162, pp.62-73. ⟨10.1016/j.jaridenv.2018.11.013⟩
- Accession number :
- edsair.doi.dedup.....ee335b68809c1d22e1cfe75727b565b3