Population structure and dynamic characteristics of the endangered plant Trachycarpus nanus in different habitats
[Objective]The authors analyzed the population structure and dynamic characteristics in differ-ent habitats and explored the main influential factors,so as to provide basis for the protection,restora-tion,and renewal of the population in this area.[Methods]In order to understand the population structure and dynamic characteristics in different habitats,the static life table,survival curve,and survival analysis function curve of the population were drawn by investigating the population of the Trachycarpus nanus in three different habitats(broad-leaved forest,mixed forest,and thicke)in Dajianshan Nature Reserve of Chuxiong.Population dynamics were predicted by using the time series model.[Results](1)In the three habitats,the population was in a declining state,and was sensitive to external interference.The survival curve was Deevey-Ⅲ type,and a large number of individuals died in the seedling stage.(2)In the three habitats,the distribution of T.nanus population was uneven and clustered,indicating that seed spreading of the T.nanus wascentered around the mother plant.[Conclusion]The population density of T.nanus was the highest in the broad-leaved forest,followed by the mixed forest,and the smallest was shrub.Combined with the study on the population age structure,it was further proved that the broad-leaved for-est and the mixed forest with better water conditions were more conducive to the survival of the population.
Trachycarpus nanuspopulation structurestatic life tablesurvival analysistime series prediction
NETL
NSTL
万方数据
维普
