Wang Zhen-Hong
College of Life Science, Guizhou University, Guiyang 550025, China.
Ying Yong Sheng Tai Xue Bao. 2007 Sep;18(9):1965-71.
The dynamics of ecosystem restoration is an important issue in ecology. Based on the theories of island biogeography, plant community succession, biodiversity sustaining mechanism and ecosystem function, a dynamic model of ecosystem restoration was deduced, and verified by the observation data on semi-humid evergreen broadleaved forest at its secondary succession phase. The dynamic principle was discussed based on the analysis of the nature of the dynamic model. It was indicated that the dynamic process of ecosystem restoration was controlled by the integrative effect of ecosystem restoration force F1, disturbance force F2 and environmental resistance F3. The change rate of plant diversity restoration was in inverse proportion to plant species richness, and in direct proportion to the total driving force of ecosystem restoration F. F1 and F3 were the functions of initial species richness s0 and environmental resources of restoring ecosystem, while F2 was the function of disturbance intensity and species richness. When the ecosystem was under negative disturbance, plant species richness was always lower than the highest species richness sm. The smaller the s0, the stronger logistic the ecosystem restoration process would be. Mathematical models were established to calculate F1, F2 and F3, and to estimate the effects of plant diversity and disturbance on ecosystem restoration. It was suggested that the increase of plant species richness could enhance ecosystem restoration potential, and promote ecosystem stability.
生态系统恢复动力学是生态学中的一个重要问题。基于岛屿生物地理学、植物群落演替、生物多样性维持机制和生态系统功能等理论，推导了生态系统恢复的动力学模型，并通过半湿润常绿阔叶林次生演替阶段的观测数据进行了验证。在分析动力学模型性质的基础上，探讨了动力学原理。结果表明，生态系统恢复的动力学过程受生态系统恢复力F1、干扰力F2和环境阻力F3的综合作用控制。植物多样性恢复的变化率与植物物种丰富度成反比，与生态系统恢复的总驱动力F成正比。F1和F3是初始物种丰富度s0和恢复生态系统环境资源的函数，而F2是干扰强度和物种丰富度的函数。当生态系统受到负干扰时，植物物种丰富度总是低于最高物种丰富度sm。s0越小，生态系统恢复过程的逻辑斯谛性越强。建立了计算F1、F2和F3的数学模型，以估计植物多样性和干扰对生态系统恢复的影响。研究表明，植物物种丰富度的增加可以增强生态系统的恢复潜力，促进生态系统的稳定性。
