湖南舜皇山野生红豆杉的物种多样性及分布格局

通过对湖南舜皇山野生红豆杉所分布的红豆杉+红椿群落(甲)、红豆杉+白楠群落(乙)、红豆杉-朱砂根+苦糖果群落(丙)与红豆杉-大叶冷水花+大叶贯众群落(丁)群落物种多样性及分布格局进行调查与分析,得出以下主要结论：(1)Patrick丰富度指数(R)的大小顺序为丁＞丙＞甲(＝乙)(P＜0.05),Simpson多样性指数(D)为甲(≈乙)＞丁＞丙(P＜0.05),Shannon-Wiener多样性指数(H)为丙(≈丁)＞甲(≈乙)(P＜0.05),Pielou均匀度指数(E)为甲(≈乙)＞丙(≈丁)(P＜0.05)；(2)甲、乙两群落呈均匀分布格局,而丙、丁两群落呈聚集分布格局。聚集强度(K)、聚集指数(I)、平均拥挤度(m*)与格林指数(GI)的大小顺序均为丙(≈丁)＞甲(≈乙)(P＜0.05)。该结论将丰富植物生态学内容,为野生红豆杉的保护提供理论依据。

Wildlife Lagerstroemia indica in Shunhuang Mountain,Hunan: Species Diversity and Distribution Pattern

By investigating and analyzing the bio-diversity and distribution patterns of Lagerstroemia indica+Toona ciliate community(Jia), Lagerstroemia indica+ Lagerstroemia indica+Phoebe neurantha community(Yi), Lagerstroemia indica-Ardisia crenata+Lonicera fragrantissima community(Bing) and Lagerstroemia indica-Pilea hookeriana+Cyrtomium macrophyllum community(Ding), we attained the main results as follows: (1)In Jia, Yi, Bing and Ding communities, Patrick richness index(R) followed the order of Ding＞Bing＞Jia(＝Yi)(P＜0.05), Simpson bio-diversity index(D) followed the order of Jia(≈Yi)＞Ding＞Bing(P＜0.05), Shannon-Wiener bio-diversity index(H) followed the order of Bing(≈Ding)＞Jia(≈Yi)(P＜0.05), Pielou evenness index(E) followed the order of Jia(≈Yi)＞Bing(≈Ding)(P＜0.05); (2)Jia or Yi communities took on evenness distribution pattern, and Bing or Ding communities took on clump distribution pattern. Clump intensity(K), Clump index(I), Mean crowding(m*) and Green index(GI) were followed the order as Bing(≈Ding)＞Jia(≈Yi)(P＜0.05)。This study will to some degree enrich and broaden the vegetation ecology, and provide theoretical basis for the protecting of wildlife Lagerstroemia indica.