贵州荔波喀斯特次生林的物种多样性研究

Study of Species Multiplicity in Guizhou Litchi Karst Secondary Forest

在线路调查和样方调查的基础上,研究了贵州荔波拉桥喀斯特次生林的物种多样性。多样性测度指标主要采用Simpson多样性指数、Simpson优势度指数、Pielou均匀度指数和Patrick丰富度指数4个指标。结果表明,各群落不同层次的多样性主要测度指标由大到小依次为灌木层>乔木层>草本层,符合亚热带森林生态系统的一般规律。多样性指数与优势度指数存在较强的负相关。群落均匀度指数与优势度指数存在明显的正相关。不同群落相异性系数分析表明,贵州荔波喀斯各群落间的物种组成差别较大,群落的生境多样性较丰富。

Based on the line investigation and the quadrat investigation,species multiplicity in Guizhou Litchi karst secondary forest were studied.Simpson multiple index,Simpson dominance index,Pielou uniformity index and Patrick abundance index were used.The results showed that the change of main measure target of the multiplicity in various communities from large to small was the bush level 〉the tree level 〉the field layer,conformed to the subtropics forest ecosystem＇s general rule.The multiple index and the dominance index existed strong inverse correlation.The community uniformity index and dominance index existed obvious correlation.The different community diversity coefficient analysis indicated that species composition difference in various communities,Guizhou Libo karst secondary forest was big and community＇s habitat multiplicity was rich.