干旱区生态环境知识资源中心(Arid): Telecoupled urban demand from West African cities causes social-ecological land use transformation in Saharan oases

Arid

DOI	10.1371/journal.pone.0289694
	Telecoupled urban demand from West African cities causes social-ecological land use transformation in Saharan oases
	Fastner, Kira; Djibrilla, Salouhou; Nguyen, Thanh Thi; Buerkert, Andreas
通讯作者	Buerkert, A
来源期刊	PLOS ONE
ISSN	1932-6203
出版年	2023
卷号	18 期号:9
英文摘要	Little is known about the long-distance telecoupling effects of urban food demands on land use changes (LUCs) in remote oases of the Southern Sahara. Using the example of two typical oasis settlements on Mont Bagzam in the southern Ar Mountains of Niger which are linked to regional and global markets by an unpaved road since 2015, this study aimed at analyzing time trajectories of LUCs and related changing agricultural production patterns. LUCs were quantified for 1955 to 2022 using GIS-based mapping of agriculture and natural vegetation based on historical aerial photographs, CORONA and multi-spectral satellite images, and high resolution drone-based surveys. The results show a major increment in actively used agricultural land in the 850 ha watershed of the two oases from 11 ha in 1955 to 13 ha in 2003 and 68 ha in 2022 as well as the addition of 92 irrigation wells to 16 existing ones between 2003 and 2022. LUCs and evapotranspiration calculated from climatic data of a local weather station allowed to estimate changes of irrigation water needs in the selected watershed. While annual precipitation averages only 214 mm, local reference evapotranspiration may reach 1,476 mm year(-1). Therefore, the additional annual irrigation water needs for the newly established fields between 2003 and 2022 cultivated to cash crops rose by 696 million l. To detect LUC effects on soil quality, soil samples of onion and garlic fields of different ages were collected employing a false-time-series approach. Results reveal increasing soil pH and salt concentrations and falling ground water tables, which reflects a negative water balance and ground water extraction above recharge levels. Our study provides evidence that the newly established telecoupled production systems on Mont Bagzam threaten the sustainability of existing local agricultural production and related livelihoods of agro-pastoralists.
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:001091871500041
WOS关键词	WATER-USE ; MANAGEMENT ; SYSTEMS ; OASIS ; SUSTAINABILITY ; MOUNTAINS ; DYNAMICS ; TRAGEDY ; CLIMATE ; JORDAN
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/398130
推荐引用方式 GB/T 7714	Fastner, Kira,Djibrilla, Salouhou,Nguyen, Thanh Thi,et al. Telecoupled urban demand from West African cities causes social-ecological land use transformation in Saharan oases[J],2023,18(9).
APA	Fastner, Kira,Djibrilla, Salouhou,Nguyen, Thanh Thi,&Buerkert, Andreas.(2023).Telecoupled urban demand from West African cities causes social-ecological land use transformation in Saharan oases.PLOS ONE,18(9).
MLA	Fastner, Kira,et al."Telecoupled urban demand from West African cities causes social-ecological land use transformation in Saharan oases".PLOS ONE 18.9(2023).