河南小秦岭自然保护区天然混交林物种多样性研究

The Mixed Forest Species Diversity in Xiaoqinling National Nature Reserve of Henan

应用物种丰富度指数、多样性指数和均匀度指数等指标对小秦岭国家级自然保护区西枣香林区1 hm固定样地内的植物区系组成和物种多样性进行研究分析.结果表明,样地内共有胸径≥1 cm的木本植物54种3514株,隶属于28科41属;区系成分较为复杂,以广布分布成分为主,同时含有一定比例的温带和热带区系分布,体现了该区南北过渡,东西交汇的特征.群落各层次的Shannon—Wiener多样性指数(H)表现为乔木层>灌木层>层间植物层;Hurlbert指数(DH)表现为乔木层>灌木层>层间植物层;Margalef丰富度指数(D2)表现为乔木层>灌木层>层间植物层;Pielou均匀度指数(J)表现为乔木层>灌木层>层间植物层;Simpson优势度指数(D1)表现为层间植物层>灌木层>乔木层.为认识和研究小秦岭物种多样性特点提供参考.

The species richness index,diversity index and evenness index were applicated to study the species composition and diversity in the Xizaoxiang forests 1 hm fixed plot of Xiaoqinling National Nature Reserve of China. The results showed that the plots have with 54 species and 3514 woody plants DBH （Diameter at breast height） I〉 lcm,belonging to 28 families and 41 genera. Region compostitions is complex,mainly the widespread distribution, and containing a certain percentage of the temperate and tropical flora distribution. The performance of Shannon-Wiener diversity index （H） showed the tree layer〉 shrub layer〉 inter layer, Hurlbert index （D,） showed the tree layer〉 shrub layer〉inter layer, the Margalef richness index （D） showed the tree layer〉 shrub layer〉inter layer; Pielou evenness index （J） showed the tree layer〉 shrub layer〉 inter layer： Simpson dominance index 691） showed inter layer 〉shrub layer 〉tree layer. This study provides reference for the further research of speices diversity in Xiaoqinling.