干旱区生态环境知识资源中心(Arid): Understanding N2O Emissions in African Ecosystems: Assessments from a Semi-Arid Savanna Grassland in Senegal and Sub-Tropical Agricultural Fields in Kenya

Arid

DOI	10.3390/su12218875
	Understanding N2O Emissions in African Ecosystems: Assessments from a Semi-Arid Savanna Grassland in Senegal and Sub-Tropical Agricultural Fields in Kenya
	Bigaignon, Laurent; Delon, Claire; Ndiaye, Ousmane; Galy-Lacaux, Corinne; Serca, Dominique; Guerin, Frederic; Tallec, Tiphaine; Merbold, Lutz; Tagesson, Torbern; Fensholt, Rasmus; Andre, Sylvain; Galliau, Sylvain
通讯作者	Bigaignon, L ; Delon, C
来源期刊	SUSTAINABILITY
EISSN	2071-1050
出版年	2020
卷号	12 期号:21
英文摘要	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.
英文关键词	nitrogen GHG chambers modelling tropical ecosystems
类型	Article
语种	英语
开放获取类型	Green Submitted, gold
收录类别	SCI-E ; SSCI
WOS记录号	WOS:000589428800001
WOS关键词	NITROUS-OXIDE EMISSIONS ; GREENHOUSE-GAS EMISSIONS ; SOIL-ATMOSPHERE EXCHANGE ; LAND-USE CHANGE ; GRAZED ECOSYSTEM ; EDDY COVARIANCE ; NO EMISSIONS ; CH4 FLUXES ; FOREST ; CLIMATE
WOS类目	Green & Sustainable Science & Technology ; Environmental Sciences ; Environmental Studies
WOS研究方向	Science & Technology - Other Topics ; Environmental Sciences & Ecology
来源机构	French National Research Institute for Sustainable Development
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327516
作者单位	[Bigaignon, Laurent; Delon, Claire; Galy-Lacaux, Corinne; Serca, Dominique; Andre, Sylvain; Galliau, Sylvain] Univ Toulouse, Lab Aerol, UPS, CNRS, F-31013 Toulouse 6, France; [Bigaignon, Laurent; Tallec, Tiphaine] Univ Toulouse, Ctr Etud Spatiales BIOsphere, CNES, UPS,IRD,CNRS, F-31013 Toulouse 6, France; [Ndiaye, Ousmane] Inst Senegalais Rech Agr, Ctr Rech Zootech, BP 3120, Dakar, Senegal; [Guerin, Frederic] Univ Toulouse, Geosci Environm Toulouse, CNRS, UPS,IRD,CNES, F-31013 Toulouse 6, France; [Merbold, Lutz] Int Livestock Res Inst, Mazingira Ctr, Nairobi 30709, Kenya; [Merbold, Lutz] Agroscope, Res Div Agroecol & Environm, Reckenholzstr 191, CH-8046 Zurich, Switzerland; [Tagesson, Torbern] Lund Univ, Dept Phys Geog & Ecosyst Sci, Box 117, S-22100 Lund, Sweden; [Tagesson, Torbern; Fensholt, Rasmus] Univ Copenhagen, Dept Geosci & Nat Resource Management, DK-1165 Copenhagen, Denmark
推荐引用方式 GB/T 7714	Bigaignon, Laurent,Delon, Claire,Ndiaye, Ousmane,et al. Understanding N2O Emissions in African Ecosystems: Assessments from a Semi-Arid Savanna Grassland in Senegal and Sub-Tropical Agricultural Fields in Kenya[J]. French National Research Institute for Sustainable Development,2020,12(21).
APA	Bigaignon, Laurent.,Delon, Claire.,Ndiaye, Ousmane.,Galy-Lacaux, Corinne.,Serca, Dominique.,...&Galliau, Sylvain.(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).
MLA	Bigaignon, Laurent,et al."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(2020).