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Spatio-temporal dynamics of climate change, land degradation, and water insecurity in an arid rangeland: The Río San Miguel watershed, Sonora, Mexico
Journal of Arid Environments ( IF 2.7 ) Pub Date : 2021-06-29 , DOI: 10.1016/j.jaridenv.2021.104539
Ryan H. Lee , Luis Alan Navarro-Navarro , América Lutz Ley , Kyle Hartfield , Douglas R. Tolleson , Christopher A. Scott

Rangelands are complex social-ecological systems (SES) commonly used to support ranching and other agrarian livelihoods. Common to Earth's drylands, rangelands are susceptible to drought, desertification, and land degradation from both climatic and human activities. In the arid Americas, ranching communities are often located in watersheds and rely on local riparian resources (e.g. surface- and ground-water) to support crop and animal cultivation. However, anthropogenic climate change in combination with intensified agriculture integrated into international markets degrade both landscape and water resources. In Sonora, Mexico's Río San Miguel Watershed we find via an interdisciplinary set of methods that rangeland productivity, surface-water reaches, and aquifers are reduced to critical levels, agrarian livelihoods endangered, and within this dynamic, that downstream locations are less resilient and water secure than operations upstream. This spatio-temporal dynamic to water insecurity is due both to (a) latitudinal-based climatic changes and (b) upstream groundwater pumping activity. Participatory rapid rural appraisal, agro-ecosystem analysis, and remote sensing tell us how climate, landscape, water, and ranching operation dynamics are interrelated and affect SES morphology and resilience across time, operations, and sub-watersheds. Partnerships and cooperation among ranchers, sub-watersheds, and institutions are among the management and policy interventions available to prepare for or mitigate the developing social-ecological crisis in the watershed. Lessons from Mexico's Río San Miguel Watershed are relevant for other drylands, agrarian systems, and groundwater-reliant economies, especially as the specter of long-term global climate change and water insecurity looms large for many of the Earth's social-ecological systems.



中文翻译:

干旱牧场气候变化、土地退化和水资源不安全的时空动态:墨西哥索诺拉州的圣米格尔河流域

牧场是复杂的社会生态系统 (SES),通常用于支持牧场和其他农业生计。与地球上的旱地一样,牧场容易受到气候和人类活动造成的干旱、荒漠化和土地退化的影响。在干旱的美洲,牧场社区通常位于流域内,依靠当地河岸资源(例如地表水和地下水)来支持作物和动物种植。然而,人为气候变化与融入国际市场的集约化农业相结合,使景观和水资源退化。在墨西哥的索诺拉河圣米格尔流域,我们通过一套跨学科的方法发现牧场生产力、地表水到达和含水层减少到临界水平,农业生计受到威胁,在这种动态中,下游位置的弹性和水安全性低于上游操作。这种水资源不安全的时空动态是由于(a)基于纬度的气候变化和(b)上游地下水抽取活动。参与式快速农村评估、农业生态系统分析和遥感告诉我们气候、景观、水和牧场经营动态如何相互关联并影响 SES 形态和跨时间、经营和子流域的恢复力。牧场主、子流域和机构之间的伙伴关系和合作是可用于准备或减轻流域发展中的社会生态危机的管理和政策干预措施之一。墨西哥里约圣米格尔流域的经验教训与其他旱地、农业系统、

更新日期:2021-06-30
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