漫湾库区周边常绿阔叶林群落多样性研究

Research on Biodiversity of the Evergreen Broad-leaved Forest near Manwan Reservoir Area in Yunnan Province

通过样方法对漫湾库区周边的常绿阔叶林群落多样性进行研究,结果表明:在漫湾库区周边的常绿阔叶林群落样地内维管束植物100种,隶属于44科。蕨类植物共3科3种,种子植物有41科、97种。含种数最多的科是山茶科,其次是樟科,含单种的科有28科,占科总数的63.64%。乔木层中山茶科和樟科的种占据优势,其重要值之和为57.6%;灌木层山茶科和壳斗科占据优势,其重要值之和是34.5%。群落生活型小高位芽植物种类最多,占总种数的43.7%,矮高位芽植物占34.8%,地面芽植物很少,只占总种数的0.3%。群落中大径级的植物优势不十分明显,多数种类在中小径级范围有较多的分布。灌木层的Shannon-Weiner指数、Simpson指数和Margalef指数均比乔木层和草本层的大,从灌木层、乔木层到草本层的多样性指数呈下降趋势。

This paper studied biodiversity of the evergreen broad-leaved forest near Manwan Reservoir using quadrat method.The results were as follows：there were 100 vascular plants which belonged to 44 families.Three families of ferns had three species.Seed plants had 41 families,97 species.Theaceae had the most,and Lauraceae was the next.The families which had single species had 28,and 63.64% of the total of families.Theaceae and Lauraceae on the arbor layer were dominant families,the important value was 57.6%;The shrub layer Theaceae and Fagaceae were dominant,the important value was 34.5%.The small high bud plant species were the most,namely 43.7%,the short of high bud plants was 34.8%.Only 0.3% of the total species was hemicryptophyta.The large diameter levels of plants were not significant,and most of DBH concentrate the middle and small diameter levels.Shannon-Weiner index,Simpson index and Margalef index of the shrub layer were more than arbor layer and herb layer.It meant that the biodiversity declined from shrub layer,arbor layer to herb layer.