浙江省3种楠木主要天然种群的群落结构和物种多样性

Community Structure And Species Diversities of Natural Populations of Phobe bournei,Ph.Chekiangensis and Machilus pauhoi in Zhejiang Province

以浙江省3种楠木主要天然种群的群落学调查为基础,对其天然种群的群落类型、植物多样性等特征进行了分析研究。研究结果表明,目前浙江省闽楠(Phoebe bournei)、浙江楠(Phoebe chekiangensis)和刨花楠(Machilus pauhoi)天然种群分布不论从数量上还是面积上都极其有限;群落层次性较强;闽楠、浙江楠和刨花楠在各自群落的乔木层中都占有优势;同一群落不同层次的物种多样性差异较大,庆元县的刨花楠群落和杭州仁寿山的浙江楠群落乔木层、灌木层的Shannon-Wiener指数较高,开化、庆元的闽楠群落,建德的刨花楠群落和杭州理安寺的浙江楠群落乔木层多样性指数较低,灌木层、草本层多样性指数较高。

Based on the investigations of natural populations of Phoebe bournei Ph. chekiangensis and Machilus pauhoi in Zhejiang province, community types and species diversity of their communities were studied and analyzed. The results showed that population quantity and distribution area ofPh, bournei, Ph. chekiangensis and M. pauhoi in the province was small. The layers of arbor, shrub and herb could be distinguished clearly. Ph. bournei, Ph. chekiangensis and M. pauhoi was dominant species in arbor layer of their communities. The species diversity of different layers in the same community showed great difference. The community of M. pauhoi in Qingyu＇an and of Ph. chekiangensis community in Rensbou Mountain of Hangzhou had higher diversity index in arbor and shrub layer. The community of Ph. bournei in Kaihua and Qingyuan, that of M. pauhoi in Jiande and ofPh. chekiangensis in Li＇an Temple in Hangzhou had higher diversity index in shrub and herb layer.