干旱区生态环境知识资源中心(Arid): Livestock induces strong spatial heterogeneity of soil CO_2, N_2O and CH_4 emissions within a semi-arid sylvo-pastoral landscape in West Africa

Arid

	Livestock induces strong spatial heterogeneity of soil CO_2, N_2O and CH_4 emissions within a semi-arid sylvo-pastoral landscape in West Africa
	Assouma Mohamed H; Serca Dominique; Guerin Frederic; Blanfort Vincent; Lecomte Philippe; Toure Ibra; Ickowicz Alexandre; Manlay Raphael J; Bernoux Martial; Vayssieres Jonathan
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2017
卷号	9 期号:2 页码:210-221
英文摘要	Greenhouse gas (GHG) emissions from the surface soils and surface water receiving animal excreta may be important components of the GHG balance of terrestrial ecosystems, but the associated processes are poorly documented in tropical environments, especially in tropical arid and semi-arid areas. A typical sylvo-pastoral landscape in the semi-arid zone of Senegal, West Africa, was investigated in this study. The study area (706 km~2 of managed pastoral land) was a circular zone with a radius of 15 km centered on a borehole used to water livestock. The landscape supports a stocking rate ranging from 0.11 to 0.39 tropical livestock units per hectare depending on the seasonal movements of the livestock. Six landscape units were investigated (land in the vicinity of the borehole, natural ponds, natural rangelands, forest plantations, settlements, and enclosed plots). Carbon dioxide (CO_2), nitrous oxide (N_2O) and methane (CH_4) fluxes were measured with static chambers set up at 13 sites covering the six landscape units, and the 13 sites are assumed to be representative of the spatial heterogeneity of the emissions. A total of 216 fluxes were measured during the one-year study period (May 2014 to April 2015). At the landscape level, soils and surface water emitted an average 19.8 t C-CO_2 eq/(hm~2·a) (CO_2: 82%, N_2O: 15%, and CH_4: 3%), but detailed results revealed notable spatial heterogeneity of GHG emissions. CO_2 fluxes ranged from 1148.2 (91.6) mg/(m~2·d) in rangelands to 97,980.2 (14,861.7) mg/(m~2·d) in surface water in the vicinity of the borehole. N_2O fluxes ranged from 0.6 (0.1) mg/(m~2·d) in forest plantations to 22.6 (10.8) mg/(m~2·d) in the vicinity of the borehole. CH_4 fluxes ranged from-3.2 (0.3) mg/(m~2·d) in forest plantations to 8788.5 (2295.9) mg/(m~2·d) from surface water in the vicinity of the borehole. This study identified GHG emission "hot spots" in the landscape. Emissions from the surface soils were significantly higher in the landscape units most frequently used by the animals, i.e., in the vicinity of the borehole and settlements; and emissions measured from surface water in the vicinity of the borehole and from natural ponds were on average about 10 times higher than soil emissions.
英文关键词	greenhouse gases soil surface water livestock landscape Senegal
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:5931587
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335770
作者单位	Assouma Mohamed H, CIRAD-UMR Selmet, Campus International Baillarguet, Montpellier, 34398, France.; Blanfort Vincent, CIRAD-UMR Selmet, Campus International Baillarguet, Montpellier, 34398, France.; Lecomte Philippe, CIRAD-UMR Selmet, Campus International Baillarguet, Montpellier, 34398, France.; Toure Ibra, CIRAD-UMR Selmet, Campus International Baillarguet, Montpellier, 34398, France.; Ickowicz Alexandre, CIRAD-UMR Selmet, Campus International Baillarguet, Montpellier, 34398, France.; Vayssieres Jonathan, CIRAD-UMR Selmet, Campus International Baillarguet, Montpellier, 34398, France.; Serca Dominique, Laboratoire d'Aerologie-OMP, Universite Paul Sabatier, Toulouse, 31400, France.; Guerin Frederic, Geosciences Environnement Toulouse UMR 5563 & UR 234 IRD, Universite Paul Sabatier, Toulouse, 31400, France.; Manlay Raphael J, AgroParisTech-UMR Eco&Sols, 2 place Viala, Montpellier SupAgro, Montpellier, 34060, France.; Bernoux Martial, IRD-UMR Eco&Sols, 2 place Viala, Montpellier SupAgro, Montpellier, 34060,...
推荐引用方式 GB/T 7714	Assouma Mohamed H,Serca Dominique,Guerin Frederic,et al. Livestock induces strong spatial heterogeneity of soil CO_2, N_2O and CH_4 emissions within a semi-arid sylvo-pastoral landscape in West Africa[J],2017,9(2):210-221.
APA	Assouma Mohamed H.,Serca Dominique.,Guerin Frederic.,Blanfort Vincent.,Lecomte Philippe.,...&Vayssieres Jonathan.(2017).Livestock induces strong spatial heterogeneity of soil CO_2, N_2O and CH_4 emissions within a semi-arid sylvo-pastoral landscape in West Africa.Journal of Arid Land,9(2),210-221.
MLA	Assouma Mohamed H,et al."Livestock induces strong spatial heterogeneity of soil CO_2, N_2O and CH_4 emissions within a semi-arid sylvo-pastoral landscape in West Africa".Journal of Arid Land 9.2(2017):210-221.