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The Quest for Greener Pastures: Evaluating the Livelihoods Impacts of Providing Vegetation Condition Maps to Pastoralists in Eastern Africa
Ecological Economics ( IF 7 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.ecolecon.2020.106708
Elia Axinia Machado , Helene Purcell , Andrew M. Simons , Stephanie Swinehart

Pastoral households are faced with making migration decisions under increasing uncertainty about resource availability and limited coping strategies due to mounting socioeconomic and climatic stressors. We assess the potential of providing vegetation condition maps to support the migration decisions of pastoralists in Ethiopia and Tanzania and the impact of map usage on their herd condition and size. The maps were generated from remotely sensed data using the Normalized Difference Vegetation Index (NDVI) as a proxy for vegetation condition and overlain with pastoralists' preferred grazing areas. We surveyed pastoralists before maps were distributed (baseline), and approximately a year (midline), and two years (endline) after map distribution began. Map adopters in both countries reported an overwhelmingly positive experience and stated the maps were accurate and helpful. However, the use of maps for migration decisions was low in the follow-up periods, partly due to challenges in map distribution (26% and 2% in Ethiopia; and 35% and 29% in Tanzania at midline and endline respectively). Map usage was associated with improved animal condition in Tanzania, but we find no causal evidence that map usage affected herd size in the randomized controlled trial in Ethiopia.

中文翻译:

寻找更绿色的牧场:评估向东非牧民提供植被状况地图对生计的影响

由于社会经济和气候压力因素不断增加,在资源可用性的不确定性增加和应对策略有限的情况下,牧民家庭面临着做出迁移决定的问题。我们评估了提供植被状况地图以支持埃塞俄比亚和坦桑尼亚牧民迁徙决定的潜力,以及地图使用对其畜群状况和规模的影响。这些地图是根据遥感数据生成的,使用归一化植被指数 (NDVI) 作为植被状况的代理,并覆盖牧民的首选放牧区。我们在地图分发前(基线)、地图分发开始后大约一年(中线)和两年(终线)对牧民进行了调查。两国的地图采用者都报告了非常积极的体验,并表示地图准确且有用。然而,在后续期间,迁移决策中地图的使用率较低,部分原因是地图分布存在挑战(埃塞俄比亚为 26% 和 2%;坦桑尼亚中线和端线分别为 35% 和 29%)。地图使用与坦桑尼亚动物状况的改善有关,但我们在埃塞俄比亚的随机对照试验中没有发现地图使用影响畜群规模的因果证据。
更新日期:2020-09-01
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