东莞银瓶山森林公园浙江润楠群落的基本特征

The Characteristics of Machilus chekiangensis Community in Yinpingshan Forest Park in Dongguan,Guangdong

应用样方调查法研究了广东省东莞市银瓶山森林公园浙江润楠群落物种组成及优势种群的空间分布格局。结果表明:(1)浙江润楠群落以樟科、山矾科及茜草科等热带和亚热带植物类群为优势,浙江润楠是群落的优势种群;(2)群落垂直结构分为乔木层、灌木层和草本层,层间植物亦较丰富。从群落物种多样性上来分析,Simpson多样性指数以灌木层的最大,乔木层和草本层相当;Shannon-Wiener多样性指数和Margalef丰富度指数的大小顺序均为:灌木层﹥乔木层﹥草本层;Pielou均匀度指数的大小顺序则为:乔木层﹥灌木层﹥草本层;(3)种群中浙江润楠幼苗个体较少,中龄级立木较多,幼龄期个体呈聚集分布,成年期立木趋于随机分布。

By quadrat sampling method, the authors studied species composition and spatial distribution pattern of dominant population of Machilus chekiangensis community in Yinpingshan forest park in Dongguan, Guangdong. The results are as follows： The species composition was consist of families Lauraceae, Symplocaceae and Rubiaceae with obvious tropical and subtropical characteristics. M. chekiangensis was the dominant species. The structure of the community had three layer, including tree, shrub and herbaceous layer, with abundant inter- layer plants. The community diversity was described by different indexes. The value of Simpson＇s diversity index was highest in the shrub layer, followed by tree and herbaceous layer. The order of both Shannon-Wiener＇s index and Margalef＇s index were shrub layer 〉 tree layer 〉 herbaceous layer. For Pielou＇s index, the order was tree layer 〉 shrub layer 〉 herbaceous layer. There were a small number of seedlings and more mid-age trees of M. chekiangensis in the community. The seedlings of M. chekiangensis were in clumped distribution pattern, while the mature ones were in random distribution pattern.