嵩山国家森林公园侧柏人工林恢复过程中物种多样性和种间关系变化

Changes of Species Diversity and Interspecific Association in the Artificial Restoration Process of Platycladua orientalis Plantations, Songshan Mountains

通过样方调查,对侧柏人工林恢复过程中群落各层物种多样性变化以及物种种间关系进行了研究,进而探讨了不同阶段人工林林下物种多样性与林分密度的关系.结果表明,嵩山侧柏人工林不同恢复过程中物种的丰富度、多样性和均匀性指数都在波动中逐渐增加.在人工林不同恢复阶段,群落的乔木、灌木和草本物种的平均相关系数分别为92.78%,33.33%,28.07%,乔木种类具有较高的连续性和稳定性,灌木和草本植物则随着人工林环境条件的改变显示出较大的波动性.不同演替阶段侧柏人工林林分密度对乔木层物种多样性以及灌木层和草本层的物种丰富度指数都有一定影响作用,但对草本层物种多样性影响不大.

Based on plot investigation, the developments of plant species diversity of trees, shrubs and herbs in each layer of Platyladua orientalis plantations at different restoration stages were studied. The correlation coefficients of species and the relationship between stand density and undergrowth species diversity in each layer were also discussed in this paper. The results showed that the species richness and diversity in different successional series of the P. orientalis plantations were gradually increased with a fluctuating way in the restoration process. Among the plantations of different stand ages, the average correlation coefficients of trees, shrubs and herbs species were 92.78 %, 33.33 % and 28.07 %, respectively. This result indicated that trees of the P. orientalis plantations successed with continuity and stability, but the shrub and herb layers had greatest fluctuation under the alteration of the environmental conditions of plantations. Analysis of the results also showed that stand density of the P. orientalis plantation had significant effects on plant diversity of tree layers and had some effects on the species richness of shrub and herb layers at different restoration stages.