一、概述地带性植物群落是自然历史的产物,每一群落都处于物质进化系列的某一相对阶段。森林生态系统在不断改造环境中进化。在深广度上与环境联系越多,可塑性和稳定性也就越大。这种群落与环境所建立的最充分联系,能促进生态系统多层次良性循环。由于大量生态因子 I. Overview Zonal plant communities are the product of natural history and each community is at a relative stage of material evolution. Forest ecosystems evolve in a constantly changing environment. In greater depth with the environment, the more plasticity and stability will be greater. The most adequate linkages established between such communities and the environment can promote a virtuous circle of ecosystems at multiple levels. Due to a large number of ecological factors