黑石顶针阔叶混交林演替过程中群落结构动态

Dynamics of community structure in successional process of needle and broad leaved mixed forest in Heishiding of Guangdong

分析了黑石顶针阔叶混交林在10年演变过程中的群落结构变化.结果表明,群落垂直分层日益明显;群落水平结构指标,盖度、密度、胸高断面积均有较大幅度增加;群落物种组成结构总体上变幅不大,但针叶树马尾松、杉木的优势地位明显衰弱,阔叶树木荷、腺叶山矾、鸭脚木等种的优势地位显著增强,整个群落由针叶阔叶混交林朝着阔叶针叶混交林演变;群落乔木层物种多样性、均匀度在增加,生态优势度在降低,群落向着复杂化、多层化方向发展.

This paper dealt with the dynamics of community structure in a ten year succession of needle and broad leaved mixed forest in Heishiding of Guangdong Province.The vertical community structure tended to be complex, while the horizontal one increased by a wide range.There was no big change in species composition,but the dominance of conifers Pinus massoniana and Cunninghamia lanceolata was substiuted by the broad leaved species,such as Schima superba,Symplocos adenophylla and Schefflera octophylla. The whole community changed from needle and boad leaved mixed forest into broad leaved and needle mixed forest.The species diversity and evenness of tree layer were increased,the ecological dominance was decreased,and the community became more complicated.