ABSTRACT Forest rehabilitation is when a desired tree species is planted in degraded forests or lands. Rehabilitation by planting a single tree species is a common way to restore exploited forests to maintain ecological processes. We compared woody and herbaceous understory vegetation between forests rehabilitated by mahogany (N = 12) or teak (N = 12) planted from 1941 until 2003 in Yogyakarta, Indonesia. Understory vegetation of these areas was compared with that of three native forests. Species richness, species diversity, density of plants and proportion of native plants did not differ between the rehabilitated areas and the native forest. Recently rehabilitated areas were different from the native forests while 41–74 yr after rehabilitation, characteristics of understory vegetation approached those of native forest. We described species composition using ordination, and found it to differ between areas rehabilitated with teak and with mahogany and, particularly, between the rehabilitated areas and the native forests. Time since rehabilitation and tree species planted were important for the species composition of understory vegetation. We conclude that the selection of species for rehabilitation and letting rehabilitated areas mature are important for understory development and species diversity.

中文翻译：

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印度尼西亚日惹种植柚木和桃花心木后林下的多样性和组成

摘要 森林恢复是指在退化的森林或土地上种植所需的树种。通过种植单一树种进行恢复是恢复已开发森林以维持生态过程的常用方法。我们比较了 1941 年至 2003 年在印度尼西亚日惹种植的桃花心木（N = 12）或柚木（N = 12）恢复的森林之间的木本和草本林下植被。将这些地区的林下植被与三个原始森林的林下植被进行了比较。恢复区与原生林的物种丰富度、物种多样性、植物密度和原生植物比例均无差异。最近恢复的区域与原生林不同，恢复后41-74年，林下植被特征接近原生林。我们使用排序来描述物种组成，发现用柚木和桃花心木修复的区域之间存在差异，特别是在修复区域和原始森林之间。自恢复和种植树种以来的时间对林下植被的物种组成很重要。我们得出结论，选择用于恢复的物种和让恢复区域成熟对于林下开发和物种多样性很重要。