Toward a whole-landscape approach for sustainable land use in the tropics
Toward a whole-landscape approach for sustainable land use in the tropics
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DOI：
10.1073/pnas.1011163107
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发表时间：
2010-11-16
影响因子：
11.1
通讯作者：
Rosenzweig, C.
中科院分区：
文献类型：
--
作者：
DeFries, R.;Rosenzweig, C.
增加粮食产量和减缓气候变化是热带景观的两个主要但看似矛盾的目标。本专题探讨了这些目标之间的协同作用和权衡。论文提出了四个主题：森林和农业部门在热带国家减缓气候变化方面的重要作用；与森林砍伐相关的农业扩张对全球和大陆范围内粮食总产量的贡献较小；通过将农业扩张转向已清理的土地、改善土壤、作物和牲畜管理以及农林业，提高粮食生产和减少温室气体排放之间的协同作用的机会；以及需要有针对性的政策和管理干预措施，以使这些协同机会成为现实。我们的结论是，农业集约化是实现粮食生产和气候减缓双重目标的关键因素，但没有单一的灵丹妙药可以在所有热带景观中平衡这些目标。针对特定地点的可持续土地利用战略是从对当前土地利用、人口统计以及其他生物物理和社会经济特征的评估中产生的，采用整体景观、多部门的视角。
Increasing food production and mitigating climate change are two primary but seemingly contradictory objectives for tropical landscapes. This special feature examines synergies and trade-offs among these objectives. Four themes emerge from the papers: the important roles of both forest and agriculture sectors for climate mitigation in tropical countries; the minor contribution from deforestation-related agricultural expansion to overall food production at global and continental scales; the opportunities for synergies between improved food production and reductions in greenhouse gas emissions through diversion of agricultural expansion to already-cleared lands, improved soil, crop, and livestock management, and agroforestry; and the need for targeted policy and management interventions to make these synergistic opportunities a reality. We conclude that agricultural intensification is a key factor to meet dual objectives of food production and climate mitigation, but there is no single panacea for balancing these objectives in all tropical landscapes. Place-specific strategies for sustainable land use emerge from assessments of current land use, demographics, and other biophysical and socioeconomic characteristics, using a whole-landscape, multisector perspective.