Eco-certification and coffee cultivation enhance tree cover and forest connectivity in the Colombian coffee landscapes
Eco-certification and coffee cultivation enhance tree cover and forest connectivity in the Colombian coffee landscapes
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生态认证和咖啡种植增强了哥伦比亚咖啡景观的树木覆盖率和森林连通性
DOI：
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发表时间：
2014
影响因子：
4.2
通讯作者：
E. Lambin
中科院分区：
文献类型：
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作者：
X. Rueda;N. Thomas;E. Lambin
摘要农产品生态认证为推广更可持续的做法提供了一个有吸引力的选择
在小农中，增加农业价值，并通过更好的市场准入使农民摆脱贫困。这项研究评估了咖啡种植是否与森林覆盖率和森林碎片化的变化有关，以及雨林联盟生态认证计划是否导致哥伦比亚东安第斯山脉的树木覆盖率提高和景观连通性增强。基于卫星图像、地理参考的咖啡地块和配对案例比较，我们发现咖啡种植区的森林面积更大，森林斑块更大，斑块之间的连通性比非咖啡区更好。然而，这些差异似乎不会随着时间的推移而加剧，除了咖啡种植区的茂密森林覆盖。自引入要求保护森林残留物和河岸植被的认证计划以来，后者有所增加。此外，研究区域内经过认证的农场比未认证的农场显著增加了其地块上的树木覆盖量。因此，我们的研究设计检测了认证对树木覆盖率增加的影响的额外性：在一个树木覆盖率总体增加的地区，认证农场对这一趋势的贡献明显大于非认证农场。这项研究首次评估了可由地球观测卫星探测到的生态系统一级耕作景观认证的影响。
AbstractEco-certification of agricultural commodities offers an appealing option to promote more sustainable practices
among smallholders, increase agricultural value, and lift farmers out of poverty through better market access. This study evaluates whether coffee cultivation is associated with changes in forest cover and forest fragmentation and whether the Rainforest Alliance eco-certification program has led to enhanced tree cover and greater landscape connectivity in the Colombian eastern Andes. Based on satellite imagery, geo-referenced coffee parcels and a pair–case comparison, we show that coffee-growing regions have larger areas in forest, larger forest patches, and better connectivity among patches than non-coffee areas. These differences, however, do not seem to be accentuated over time, except for dense forest cover in the coffee-growing region. The latter has increased since the introduction of a certification program that requires protection of forest remnants and riparian vegetation. Moreover, certified farms in the study area have increased the amount of tree cover on their plots significantly more than non-certified ones. Our study design, therefore, detects additionality in the impact of certification on tree cover increase: in a region with overall increase in tree cover, certified farms contributed significantly more to that trend than non-certified farms. This study presents the first evaluation of the impacts of certification in cultivated landscapes at the ecosystem level, detectable by Earth observation satellites.