Forest transitions, trade, and the global displacement of land use
Forest transitions, trade, and the global displacement of land use
复制标题
DOI：
10.1073/pnas.1014773107
复制
发表时间：
2010-12-07
影响因子：
11.1
通讯作者：
Lambin, Eric F.
中科院分区：
文献类型：
--
作者：
Meyfroidt, Patrick;Rudel, Thomas K.;Lambin, Eric F.
减少热带森林砍伐是一项国际优先事项，因为它对碳排放和生物多样性有影响。我们研究了最近的森林转型-从净毁林到净造林的转变-是否涉及通过农业和森林产品贸易在国家之间进行森林砍伐的地理位移。在最近经历森林转型的七个发展中国家中，大多数国家在当地重新造林的同时，将土地用途转移到国外。全球土地使用的变化体现在他们的净木材贸易抵消了74%的重新造林总面积。由于重新造林国家出口的农产品继续多于进口的农产品，如果将农业和林业部门都包括在内，这一净流离失所抵消了其重新造林总面积的22%。然而，在过去5年中，这一净位移增加到52%。因此，这些国家为全球净重新造林和/或减少对森林的压力作出了贡献，但近年来，这一全球环境效益一直在缩小。对森林的压力的净减少并不能解释其生态质量的差异。在评估旨在减少全球森林砍伐的国际政策的影响时，应纳入农业和森林商品的国际贸易。
Reducing tropical deforestation is an international priority, given its impacts on carbon emissions and biodiversity. We examined whether recent forest transitions-a shift from net deforestation to net reforestation-involved a geographic displacement of forest clearing across countries through trade in agricultural and forest products. In most of the seven developing countries that recently experienced a forest transition, displacement of land use abroad accompanied local reforestation. Additional global land-use change embodied in their net wood trade offset 74% of their total reforested area. Because the reforesting countries continued to export more agricultural goods than they imported, this net displacement offset 22% of their total reforested area when both agriculture and forestry sectors are included. However, this net displacement increased to 52% during the last 5 y. These countries thus have contributed to a net global reforestation and/or decrease in the pressure on forests, but this global environmental benefit has been shrinking during recent years. The net decrease in the pressure on forests does not account for differences in their ecological quality. Assessments of the impacts of international policies aimed at reducing global deforestation should integrate international trade in agricultural and forest commodities.