亚热带多优势种森林群落演替现状评判研究

亚热带多优势种常绿阔叶林演替过程，依第１优势种的耐荫，喜湿特性，可划分为６个阶段；（１）针叶林阶段；（２）以针叶树为主的针阔混交林阶段；（３）以阳生性阔叶树为主的针阔混交林阶段；（４）以阳生性树种为主的绿阔叶林，当中生性树种在成为第１优势树种表明演替已进入顶极阶段，此后，又以优势树种人布格局为依据，将顶极阶段分为第５、第６阶段；（５）未发衣完善的顶极阶段；（６）发育完善的顶极阶段。据此，判定本文所

A STUDY ON JUDGMENT AND EVALUATION OF SUCCESSION SITUATION FOR FOREST COMMUNITY WITH SEVERAL DOMINANT TREE SPECIESIN SUBTROPICAL ZONE IN CHINA

The succession process of evergreen broadleaf forest in the subtropical zone of China commonly covers coniferous forest stage,mixed forest stage including both coniferous and broadleaf trees but taking the coniferous tree as the dominant component,mixed forest stage taking light\|loving broadleaf tree as the dominant component,ever\|green broadleaf forest stage taking light\|loving broadleaf tree as the dominant component,climax stages divided into two stages based on the spatial pattems of dominant tree species:unperfectly developed climax stage and perfectly developed climax stage.According to view of the above,the deliberated ever\|green broadleaf forest community in this study was judged to be in uperfectly developed climax stage.The extent of population extension of strongly light\|loving tree species was positively correlated with the disturbance intensity.The disturbance leading the strongly light\|loving tree species to be come the first dominant species of the community was called disturbance leading regressive succession.The disturbance leading the strongly light\|loving tree species to be a dominant species of the community but not the first dominant species was called disturbance non leading regressive succession.The intensity of a disturbance leading regressive succession was stranger than that of a disturbance non leading regressive succession.The judgement of succession stage and the evaluation of disturbance intensity form a set of material on the judgmet and the evaluation of succession situation for a natural forest community.