气候变化领域集成服务门户(CCPortal): Competition for water induced by transnational land acquisitions for agriculture

CCPortal

DOI	10.1038/s41467-022-28077-2
	Competition for water induced by transnational land acquisitions for agriculture
	Chiarelli D.D.; D’Odorico P.; Müller M.F.; Mueller N.D.; Davis K.F.; Dell’Angelo J.; Penny G.; Rulli M.C.
发表日期	2022
ISSN	2041-1723
卷号	13 期号:1
英文摘要	The ongoing agrarian transition from smallholder farming to large-scale commercial agriculture promoted by transnational large-scale land acquisitions (LSLAs) often aims to increase crop yields through the expansion of irrigation. LSLAs are playing an increasingly prominent role in this transition. Yet it remains unknown whether foreign LSLAs by agribusinesses target areas based on specific hydrological conditions and whether these investments compete with the water needs of existing local users. Here we combine process-based crop and hydrological modelling, agricultural statistics, and georeferenced information on individual transnational LSLAs to evaluate emergence of water scarcity associated with LSLAs. While conditions of blue water scarcity already existed prior to land acquisitions, these deals substantially exacerbate blue water scarcity through both the adoption of water-intensive crops and the expansion of irrigated cultivation. These effects lead to new rival water uses in 105 of the 160 studied LSLAs (67% of the acquired land). Combined with our findings that investors target land with preferential access to surface and groundwater resources to support irrigation, this suggests that LSLAs often appropriate water resources to the detriment of local users. © 2022, The Author(s).
语种	英语
scopus关键词	agriculture; competition (ecology); induced response; smallholder
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/251250
作者单位	Department of Civil and Environmental Engineering, Politecnico di Milano, Milano, 20133, Italy; Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720, United States; Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, IN 46556, United States; Department of Ecosystem Science and Sustainability, Colorado State University, Fort Collins, CO 80523, United States; Department of Soil and Crop Sciences, Colorado State University, Fort Collins, CO 80523, United States; Department of Geography and Spatial Sciences, University of Delaware, Newark, DE 19716, United States; Department of Plant and Soil Sciences, University of Delaware, Newark, DE 19716, United States; Department of Environmental Policy Analysis, Institute for Environmental Studies (IVM), Vrije Univeristeit Amsterdam, Amsterdam, Netherlands
推荐引用方式 GB/T 7714	Chiarelli D.D.,D’Odorico P.,Müller M.F.,et al. Competition for water induced by transnational land acquisitions for agriculture[J],2022,13(1).
APA	Chiarelli D.D..,D’Odorico P..,Müller M.F..,Mueller N.D..,Davis K.F..,...&Rulli M.C..(2022).Competition for water induced by transnational land acquisitions for agriculture.Nature Communications,13(1).
MLA	Chiarelli D.D.,et al."Competition for water induced by transnational land acquisitions for agriculture".Nature Communications 13.1(2022).