鼎湖山生物圈保护区层间植物物种多样性的研究

本文研究了鼎湖山生物圈保护区的层间植物（含藤本植物和附生、寄生维管植物）的特点及其在8个自然植被类型的分布格局。结果表明，低海拔的河岸林和沟谷雨林中的层间植物不仅物种数和个体数多，而且多样性指数高。反映了层间植物与环境湿度呈正相关。季风常绿阔叶林中的藤本植物的种类和个体数最少，而且多样性指数最低，这与其郁闭度较大导致林下光照强度弱有关。就演替系列而言，附生植物物种多样性的顺序为：季风常绿阔叶林＞针阔混交林＞针叶林＞稀树灌丛。但藤本植物多样性指数的顺序排列为：稀树灌丛＞针叶林＞针阔混交林＞季风常绿阔叶林。在没有人类干扰的条件下，随着群落演替的进行，藤本植物的物种多样性逐渐减少。因此在某些地区，可以将藤本植物物种多样性的高低作为衡量森林演替阶段的一个指标。

Study on the species diversity of interlayer plants of Dinghushan Biosphere Reserve

The species diversity of interlayer plants and their distribution in Dinghushan Biosphere Reserve were studied. The results showed that the species diversity of interlayer plants of Dinghushan was rich. The species diversity of lianas decreased with forest succession while epiphyte showed a contrasting trend. This suggests that the diversity indices of lianas might be employed to measure forest succession. The individual number, species number and Shannon-Wiener index of lianas in ravine rain forest and riverbank forest were richer than that of other forests. These indices were the lowest in the most closed forest; monsoon evergreen broad-leaved forest . This indicates that both humidity and illumination were important factors affecting the growth and distribution of lianas.