气候变化领域集成服务门户(CCPortal): Livestock production and the water challenge of future food supply: Implications of agricultural management and dietary choices

CCPortal

DOI	10.1016/j.gloenvcha.2017.09.010
	Livestock production and the water challenge of future food supply: Implications of agricultural management and dietary choices
	Weindl I.; Bodirsky B.L.; Rolinski S.; Biewald A.; Lotze-Campen H.; Müller C.; Dietrich J.P.; Humpenöder F.; Stevanović M.; Schaphoff S.; Popp A.
发表日期	2017
ISSN	0959-3780
卷号	47
英文摘要	Human activities use more than half of accessible freshwater, above all for agriculture. Most approaches for reconciling water conservation with feeding a growing population focus on the cropping sector. However, livestock production is pivotal to agricultural resource use, due to its low resource-use efficiency upstream in the food supply chain. Using a global modelling approach, we quantify the current and future contribution of livestock production, under different demand- and supply-side scenarios, to the consumption of “green” precipitation water infiltrated into the soil and “blue” freshwater withdrawn from rivers, lakes and reservoirs. Currently, cropland feed production accounts for 38% of crop water consumption and grazing involves 29% of total agricultural water consumption (9990 km3 yr−1). Our analysis shows that changes in diets and livestock productivity have substantial implications for future consumption of agricultural blue water (19–36% increase compared to current levels) and green water (26–69% increase), but they can, at best, slow down trends of rising water requirements for decades to come. However, moderate productivity reductions in highly intensive livestock systems are possible without aggravating water scarcity. Productivity gains in developing regions decrease total agricultural water consumption, but lead to expansion of irrigated agriculture, due to the shift from grassland/green water to cropland/blue water resources. While the magnitude of the livestock water footprint gives cause for concern, neither dietary choices nor changes in livestock productivity will solve the water challenge of future food supply, unless accompanied by dedicated water protection policies. © 2017 Elsevier Ltd
英文关键词	Consumptive water use; Dietary changes; Livestock; Productivity; Water resources; Water scarcity
学科领域	agricultural management; artificial diet; cropping practice; food supply; future prospect; human activity; livestock farming; resource use; supply chain management; water footprint; water resource; water use; water use efficiency
语种	英语
scopus关键词	agricultural management; artificial diet; cropping practice; food supply; future prospect; human activity; livestock farming; resource use; supply chain management; water footprint; water resource; water use; water use efficiency
来源期刊	Global Environmental Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/117209
作者单位	Potsdam Institute for Climate Impact Research (PIK), P.O. Box 60 12 03, Potsdam, D-14412, Germany; Department of Geography, Humboldt-Universität zu Berlin, Unter den Linden 6, Berlin, 10099, Germany; Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Max-Eyth-Allee 100, Potsdam, 14469, Germany; Department of Agricultural Economics, Humboldt-Universität zu Berlin, Unter den Linden 6, Berlin, 10099, Germany
推荐引用方式 GB/T 7714	Weindl I.,Bodirsky B.L.,Rolinski S.,et al. Livestock production and the water challenge of future food supply: Implications of agricultural management and dietary choices[J],2017,47.
APA	Weindl I..,Bodirsky B.L..,Rolinski S..,Biewald A..,Lotze-Campen H..,...&Popp A..(2017).Livestock production and the water challenge of future food supply: Implications of agricultural management and dietary choices.Global Environmental Change,47.
MLA	Weindl I.,et al."Livestock production and the water challenge of future food supply: Implications of agricultural management and dietary choices".Global Environmental Change 47(2017).