云南松天然林区植物群落结构的空间动态研究

于2005年4月采用中点四分法对云南省禄丰县一平浪林场云南松天然林区植物群落结构及空间动态进行了实地调查研究.结果表明:从山坡上部到下部,物种的组成越来越丰富,其中的优势种群云南松属于衰退型、滇油杉属于增长型、黄毛青冈属于稳定型.根据更新层的重要值来判断,山坡上部将演替成为以滇油杉为主的单优群落;山坡中部将演替成为滇油杉和黄毛青冈为主的针叶、阔叶混交林;山坡下部将演替成为以黄毛青冈为主的常绿阔叶林.研究还表明,在林冠层中,除了滇油杉在山坡上部为聚集分布外,其他树种的分布格局均呈随机分布;在更新层中,优势种类均为聚集分布.

Spatial Dynamics of Plant Community Structures in Natural Pinus yunnanensis Forest Region

The plant community structure and its spatial dynamics in natural Pinus yunnanensis forest region,which belonged to Yipinglang Forest Farm of Lufeng County,Yunnan,were field investigated in April 2005.It was shown that the species compositions became richer and richer from upper mountain slope to low mountain slope and Pinus yunnanensis,Keteleeria evelyniana,Cyclobalanopsis delavayi populations as the dominant population belonged to degenerative growth type,up-growth type and stable growth type,respectively.The importance values of the renewal layers indicated that the communities to be dominated only by Keteleeria evelyniana would evolve on the upper slope,the needle-leafed and broad-leafed mixed forests to be dominated by Cyclobalanopsis delavayi and Keteleeria evelyniana would evolve finally on the middle slope and the evergreen broad-leafed forests to be dominated only by Cyclobalanopsis delavayi would be evolve finally on the lower slope.The study also indicated that all the tree species but Keteleeria evelyniana appearing to have an aggregate distribution had a random distribution in the canopy layers and all the dominant species had a aggregate distribution in the renewal layers.