关键词: 宽坝林区, 珍稀濒危植物, 区系特征保护对策

Abstract

The forest successional process is characterized by the dynamic of dominant populations in different successional stages. In this paper, the dynamic of main dominant populations in the succession process of Dinghushan forest has been studied systematically： Four communities have been selected to reprresented four different stages which are a sere. The dynamics of five dominant populations including one conifer （Pinus massoniana）, two heliophytes （Castanopsis chinertsis and Schima superba） and two mesophytes （Cryptocarya chinensis and Cryptocarya concinna） were stud- ied. Their niche breadthss, population patterns, interspecific associations and niche overlaps in 38 year＇ s change have been analyzed. The results show that the different charracteristics of dynamics and distribution of conifer, heliophyte and mesophyte populations in different succession periods reveal the position and role of each dominant population in every succession stages. The succession mechanism were revealed with population dynamic analysis.

Key words: Kuanba forest region, rare and endangered plants, folristic characteristics, protected countermeasure