浙江仙居俞坑森林群落特征研究

浙江省仙居县俞坑境内由于地形复杂 ,水热条件优越 ,加上以前交通不便 ,限制了人类的频繁活动 ,使原有的植物种类得以保存和发展。这是括苍山系仅存的一片次生湿润常绿阔叶林 ,属中亚热带低海拔地区典型的地带性植被。此地于 1991年建立了县级自然保护区 ,目前对该群落仅在演替方面作过研究1] 。本文主要对该群落的特征进行研究 ,为这一类型的植被研究和资源保护提供资料。1　自然概况俞坑位于浙江省仙居县境内 ,距括苍山主峰米筛浪约 4 0ｋｍ ,为括苍山尾部。地理位置为 2 8°0′5″Ｎ、12 0°0′5″Ｅ ,面积约 3ｋｍ2 2 ] ,海拔高度在 4…

Studies of Yukeng Forest Community Characteristics in Xianju of Zhejiang.

The Yukeng forest community,situated in Xianju County of Zhejiang Province,is rich in plant class whose family and genus are of scattered composition.There are a bit more genus in the tropical zone than in the temperate zone in terms of the distribution type of genus.Based on Raunkiaer's life-form statistics,the life-form phaenerophyte class of the community ranks the first in number and the hemicryptophyte the second. The leaves of the community are mainly microphyll,simple, herbaceous and unentire whereas they are mostly microphyll,simple,coriaceous and unentire in the tree layer. The community's vertical structures can be divided into tree layer, shrub layer,herb layer and ground layer. In this paper,the overall relatedness of the tree layer's 40 main species and the association between paired species of the forest community were examined by using the methods of variance ratio(VA) and χ2 test by 2×2 contingency table.Its result shows that the major interspecies of the tree layer,on the whole,have the great positive relatedness,and that there are more paired species of positive association than those of negative ones.