Niches Characteristics and Community Stability of Endangered Plant,Picea neoveitchii
Understanding the stability of the community and the ecological relationship between the main populations of the rare and endangered plant Picea neoveitchii community in the Bailong River Basin can provide a theoretical basis for the protection and restoration of the endangered species P. neoveitchii. Based on the community investigation,the niche characteristics and community stability of 19 main populations of P. neoveitchii community in Bailong River Basin were analyzed by using Levins niche width,Pianka niche overlap index and M. Codron stability. The results showed that:(1)P. neoveitchii and Cotinus coggygria var. pubescens were the absolute dominant species of the community,occupying the maximum niche width in different layers. They made full use of environmental resources and adapted to the changes of different environments in the field environment with limited resources. (2)There was a high degree of niche overlap within the community,and the degree of niche differentiation was not high,the demand of various populations for environmental resources showed a high degree of consistency,and the potential interspecies competition was strong. (3)The stability of the whole community and each vertical layer was far away from 20/80,which was in an unstable state. The research suggested that P. neoveitchii had a dominant position and strong competitive advantage in the whole community. However,the degree of niche differentiation within the community was not obvious,the potential competition among populations was fierce,and the structure of the community was extremely unstable. Insufficient resources and strong interspecies competition might be one of the reasons for its endangerment.
Picea neoveitchiirare and endangered plantniche characteristicscommunity stability
万方数据
维普
