Population structure of endangered species Camellia terminalis
濒危植物顶生金花茶的种群结构

Camellia terminalis is an endangered species only distributed in the evergreen monsoon rain forest in limestone hills of Tiandeng County,Guangxi of China.In this paper,the environmental conditions,resources status,and size-and height structure of C.terminalis populations were studied by field investigation and statistical analysis,and the population dynamics was predicted by cubic regression equation.The results showed that C.terminalis mainly existed in the communities of Burretiodendron hsienmu-Cinnamomum saxatile(P1),Zenia insignis-B.hsienmu(P2),Linociera ramiflora-Phoebe calcarea(P3) and Hydnocarpus serratus-Cleistanthus saichikii(P4) in Xiaoshan Town,Tiandeng County,and constituted a dominant species or one of the co-dominant species in shrub layer.The C.terminalis population in P2 showed an obviously declining trend under the stress of bad environment and human disturbance,while that in P1,P3 and P4 with stable structure showed a stable or growing tendency.Compared with the habitat in Xiaoshan Town,the environmental conditions with cold and humid climate,fertile soil,and slight human disturbance in Fuxin Town were more favorable to the development of C.terminalis.Owing to the limited resources of C.terminalis,this species should be ranked as a critically endangered species.