隔河岩水电站废弃地植被的初始生态恢复

以隔河岩水电废弃地生态治理点植被的野外调查资料为基础，报道了该废弃地上植物群落的组成、结构及物种多样性特点，评价了隔河岩水电废弃地植被的初始生态恢复状况，并对当地种和外来种作为种植苗木对生态恢复进程的作用进行了探讨．结果显示，除两种种植的苗木外，共有75种当地的植物扩散定居在被治理的废弃上，初步形成了具一定组成与结构的植物群落，明显地改变了废弃地的植被与生态环境状况．表明苗木种植能促进灌木种类的扩散和定居及植被的恢复，是一种及时有效的生态恢复技术，但不同的苗木种类对废弃地植被初始生态恢复的效果不一样．通过比较塔柏和湿地松两种人工林的生物多样性与群落结构，认为塔柏的初始生态恢复效果比湿地松好．

Primary Ecological Restoration at Wastelands of Geheyan Hydroelectrical Project

Tree plantation has been receiving increased attention as a biological tool to restore degraded ecosystem, especially some seriously damaged ecosystem,as they can accelerate natural plant succession. In this paper, we evaluate early patterns of community composition and structure under tree plantations in the waste land of Geheyan hydroelectric project. We also investigate the near undamaged natural second forest and un-managed wasteland in order to provide contrasts with our further analysis. There are seventy-five species invaded and established on wasteland other than the two planted tree species, including twenty-six shrub species and fifty herbaceous species, which belong to thirty-six families and sixty-nine genus. By contrast to the un-managed wasteland, the species under the plantations increased by 74. 4% , family by 86. 5% , and genus by 80. 0%. Those are a little more than that of the natural forest. But different planted species brought about diverse preliminary forest ecosystem under the plantation. Sixty species occurred under the plantation of Sabina chinensis, a native species, including thirty herbaceous species and sixteen woody species and fourteen vines. By contrast, there are forty-two species under the plantation of Pinus elliottii, an exotic species, including thirty-four herbaceous species, three veins and five woody species. Those difference further brought about the diverse of microclimatic and biodiversity. The species biodiversity under the Sabina chinensis increases more quickly than that under Pinus elliottii, especially on the shrub layer. It is necessary for us to get more information on the tree species for planting, not only their biological features but also their ecological characteristics before making a plantation scenarios.