School of Earth Sciences and Woods Institute, Stanford University, Stanford, CA 94305, USA.
Proc Natl Acad Sci U S A. 2011 Mar 1;108(9):3465-72. doi: 10.1073/pnas.1100480108. Epub 2011 Feb 14.
A central challenge for sustainability is how to preserve forest ecosystems and the services that they provide us while enhancing food production. This challenge for developing countries confronts the force of economic globalization, which seeks cropland that is shrinking in availability and triggers deforestation. Four mechanisms-the displacement, rebound, cascade, and remittance effects-that are amplified by economic globalization accelerate land conversion. A few developing countries have managed a land use transition over the recent decades that simultaneously increased their forest cover and agricultural production. These countries have relied on various mixes of agricultural intensification, land use zoning, forest protection, increased reliance on imported food and wood products, the creation of off-farm jobs, foreign capital investments, and remittances. Sound policies and innovations can therefore reconcile forest preservation with food production. Globalization can be harnessed to increase land use efficiency rather than leading to uncontrolled land use expansion. To do so, land systems should be understood and modeled as open systems with large flows of goods, people, and capital that connect local land use with global-scale factors.
可持续发展面临的一个核心挑战是,在提高粮食产量的同时,如何保护森林生态系统及其为我们提供的服务。发展中国家面临着经济全球化的挑战,经济全球化需要可利用耕地,这导致了森林砍伐。经济全球化放大了四种机制——位移效应、回弹效应、级联效应和汇款效应——从而加速了土地转换。少数发展中国家在最近几十年实现了土地利用的转变,同时增加了森林覆盖和农业产量。这些国家依靠农业集约化、土地用途分区、森林保护、增加对进口粮食和木材产品的依赖、创造非农就业机会、外国资本投资和汇款等各种组合。因此,健全的政策和创新可以协调森林保护和粮食生产。可以利用全球化来提高土地利用效率,而不是导致无控制的土地利用扩张。为此,土地系统应该被理解和建模为具有大量货物、人员和资本流动的开放系统,这些流动将本地土地利用与全球规模的因素联系起来。