九龙山濒危植物南方铁杉的生态位研究

采用生态位理论研究了南方铁杉在九龙山群落中的地位。结果表明：乔木层中，南方铁杉（Tsuga tchekiangensis）、猴头杜鹃（Rhododendron simiarum）、木荷（Schima superba）生态位宽度较大，它们之间的生态位相似性比例值较高，生态位重叠值较大；灌木层中，南方铁杉、猴头杜鹃、朱砂根（Ardisia crenata）、木荷、三角枫（Acer buergerignum）的生态位宽度较大，南方铁杉与这几个树种之间的生态位相似性比例值较高，生态位重叠值较大；这些分析结果为珍稀濒危植物南方铁杉种群数量的扩增具有一定的理论价值。

The Niche Characteristics of Endangered Plant Tsuga tchekiangensis in Jiulongshan National Nature Reserve of Zhejiang Province

Tsuga tchekiangensis, an endemic and rare plant species, is listed as the third class protected plant in China. To describe the niche characteristics of T. tchekiangensis, 10 plots were established in Jiulongshan National Nature Reserve and field data were obtained by contiguous grid quadrat method. The resuits indicated that comparing with other species, the niche breadth of T. tchekiangensis, Rhododendron simiarum and Schima superba in arbor layer is bigger;The niche breadth of T. tchekiangensis, Rhododen- dron simiarum ,Ardisia crenata ,Schima superba and Acer buergerignum is bigger than other shrub species; T. tchekiangensis has more similarity in niche overlap and niche similarity with these species than others. The results would offer scientific theories for Conservation of T. tchekiangensis.