Nagendra Harini
Center for the Study of Institutions, Population, and Environmental Change, Indiana University, 408 North Indiana Avenue, Bloomington, IN 47408, USA.
Proc Natl Acad Sci U S A. 2007 Sep 25;104(39):15218-23. doi: 10.1073/pnas.0702319104. Epub 2007 Sep 19.
Tropical forest habitat continues to decline globally, with serious negative consequences for environmental sustainability. The small mountain country of Nepal provides an excellent context in which to examine trajectories of forest-cover change. Despite having experienced large-scale forest clearing in the past, significant reforestation has taken place in recent years. The range of biophysical and ecological environments and diversity of tenure arrangements provide us with a context with sufficient variation to be able to derive insight into the impact of a range of hypothesized drivers of forest change. This article draws on a dataset of 55 forests from the middle hills and Terai plains of Nepal to examine the factors associated with forest clearing or regeneration. Results affirm the central importance of tenure regimes and local monitoring for forest regrowth. In addition, user group size per unit of forest area is an important, independent explanator of forest change. These variables also can be associated with specific practices that further influence forest change such as the management of social conflict, adoption of new technologies to reduce pressure on the forest, and involvement of users in forest maintenance activities. Such large-N, comparative studies are essential if we are to derive more complex, nuanced, yet actionable frameworks that help us to plan better policies for the management of natural resources.
全球范围内,热带森林栖息地持续减少,给环境可持续性带来了严重的负面影响。尼泊尔这个小山地国家为研究森林覆盖变化轨迹提供了一个绝佳的背景。尽管尼泊尔过去经历了大规模的森林砍伐,但近年来也进行了大规模的重新造林。其生物物理和生态环境的多样性以及土地保有安排的多样性,为我们提供了一个具有足够变异性的背景,使我们能够深入了解一系列假定的森林变化驱动因素的影响。本文利用尼泊尔中部山区和特赖平原55片森林的数据集,研究与森林砍伐或再生相关的因素。结果证实了土地保有制度和地方监测对森林再生的核心重要性。此外,单位森林面积的用户群体规模是森林变化的一个重要的独立解释变量。这些变量还可能与进一步影响森林变化的特定做法相关,比如社会冲突的管理、采用新技术以减轻对森林的压力,以及用户参与森林维护活动。如果我们要得出更复杂、更细致但可操作的框架,以帮助我们更好地规划自然资源管理政策,那么这种大样本的比较研究至关重要。