鹞落坪树生地衣群落数量分类及多样性

Numerical classification and diversity of corticolous lichen communities of Yaoluoping

关键词:  树生地衣  多样性  数量分类  群落结构  鹞落坪

Key words:  corticolous lichen  lichen diversity  numerical classification  community structure  Yaoluoping National Nature Reserve

摘要:

采用主成分分析（PCA）对鹞落坪国家级自然保护区森林树生地衣进行了群落排序；应用Spearman秩相关检对22种地衣进行了种间关联分析；以地衣多样性、相似性和均匀度等指数，对各地衣群落进行了比较。根据主成分分析结果并结合生境特征，保护区树生地衣形成了6种群落。Spearman秩相关检表明39个种对呈显著正相关，其中16个种对呈极显著正相关，分别占总种对的16.8%和6.9%，但无负相关种对出现，根据检验结果并结合实际调查，将这些正相关的地衣种类分成了三种情况。各个地衣种之间的竞争很小。群落A多样性指数最高（3.166），群落F各个指数最低。

Abstract:

Eighteen 20 m×20 m quadrats were sampled in the forest of Yaoluoping National Nature Reserve and lichen species and individuals were noted in each quadrat. Principal component anlysis(PCA)was employed for ordination，and Spearman rank correlation coefficient was used to evaluate interspecific correlation. Three parameters of each community type，similarity index，diversity index and evenness index，were computed，and the indexes were compared with each other respectively. Based on PCA data，18 quadrats were divided into 6 communities. The result of Spearman rank correlation coefficient showed 39 species pairs were significant positive association，in which 16 were very significant association，but no species pair was negative. According to Spearman rank correlation coefficient，competition between the lichen species was low. Community A had the highest diversity(3.166)，while every index of community F was the lowest in the 6 community.