le Polain de Waroux Yann, Garrett Rachael D, Heilmayr Robert, Lambin Eric F
School of Earth, Energy, and Environmental Sciences, Stanford University, Stanford, CA 94305; Woods Institute for the Environment, Stanford University, Stanford, CA 94305;
Department of Earth and Environment, Boston University, Boston, MA 02215;
Proc Natl Acad Sci U S A. 2016 Apr 12;113(15):4021-6. doi: 10.1073/pnas.1602646113. Epub 2016 Mar 28.
Growing demand for agricultural commodities is causing the expansion of agricultural frontiers onto native vegetation worldwide. Agribusiness companies linking these frontiers to distant spaces of consumption through global commodity chains increasingly make zero-deforestation pledges. However, production and land conversion are often carried out by less-visible local and regional actors that are mobile and responsive to new agricultural expansion opportunities and legal constraints on land use. With more stringent deforestation regulations in some countries, we ask whether their movements are determined partly by differences in land-use policies, resulting in "deforestation havens." We analyze the determinants of investment decisions by agricultural companies in the Gran Chaco and Chiquitano, a region that has become the new deforestation "hot spot" in South America. We test whether companies seek out less-regulated forest areas for new agricultural investments. Based on interviews with 82 companies totaling 2.5 Mha of properties, we show that, in addition to proximity to current investments and the availability of cheap forestland, lower deforestation regulations attract investments by companies that tend to clear more forest, mostly cattle ranching operations, and that lower enforcement attracts all companies. Avoiding deforestation leakage requires harmonizing deforestation regulations across regions and commodities and promoting sustainable intensification in cattle ranching.
对农产品需求的不断增长,正促使全球各地的农业前沿向原生植被地区扩张。通过全球商品链将这些前沿地区与遥远消费地相连的农业综合企业,越来越多地做出零森林砍伐的承诺。然而,生产和土地转换往往由不太引人注目的地方和区域行为体进行,这些行为体流动性强,会对新的农业扩张机会和土地使用的法律限制做出反应。鉴于一些国家出台了更严格的森林砍伐法规,我们不禁要问,它们的行动是否部分由土地使用政策的差异所决定,从而形成“森林砍伐避风港”。我们分析了农业公司在大查科和奇基塔诺地区投资决策的决定因素,该地区已成为南美洲新的森林砍伐“热点”地区。我们测试了企业是否会寻找监管较松的林区进行新的农业投资。基于对82家公司的访谈,这些公司的土地总面积达250万公顷,我们发现,除了靠近现有投资和廉价林地的可获得性之外,较低的森林砍伐法规吸引了那些倾向于砍伐更多森林的公司(主要是养牛场经营企业)的投资,而较低的执法力度则吸引了所有公司。避免森林砍伐漏洞需要协调各地区和各类商品的森林砍伐法规,并推动养牛业的可持续集约化发展。