【摘要】 研究了黑石顶自然保护区未受干扰的马尾松林与人为干扰马尾松林的物种多样性．结果表明，正常未受干扰马尾松林的物种丰富度指数为１３．０，Ｓｈａｎｎｏｎ－ｗｉｅｎｅｒ指数为４．６、Ｐｉｅｌｏｕ均匀度０．７，Ｓｉｍｐｓｏｎ指数为１０．０；干扰恢复马尾松林的各项物种多样性指数值比正常林高，分别为１６．５，５，３，０．８和３３．４，其中亚冠层和灌木层所起作用较大．利用群落优势度衡量２个群落的稳定性，表明正常林的群落优势度远高于人为干扰林．而受到干扰的马尾松林，马尾松生长几乎停滞，阔叶物种入侵后迅速抢占有利生态位，争夺阳光和空间资源．在演替过程中，物种多样性的增加可能是生态系统对外界轻度干扰的一种适应，是生态系统恢复稳定的一种对策．更多还原

【Abstract】 The species diversities of the undisturbed forest and the disturbed forest of Pinus massoni- ana were studied. The results showed that the species richness index, Shannon-wiener index, Pielou evenness and Simpson index of the undisturbed forest were 13.0, 4.6, 0.7 and 10.0, and the indices of the disturbed forest were 16.5, 5.3, 0.8 and 33.4 respectively, higher than those of the undis- turbed forest, especially in the second canopy and shrub layer. Compared the stability of two forests with community dominance index, it was clear that community dominance index of the undisturbed for- est was higher than that of the disturbed one. It is proposed that the increase of species diversity is a adapting manner for ecosystem against disturbance, and is a strategy of disturbed ecosystem to recover balance.更多还原