张家港市3种林型昆虫群落结构的研究

Research on the community structure of the insects in three stand types in Zhangjiagang City

为了解张家港市的林木昆虫种类和群落组成,于2015年7月至2016年7月对全市范围内的防护林、经济林和特种用途林3种林型的昆虫资源进行了调查研究,并运用物种丰富度、均匀度、优势集中度和多样性指数等分析了昆虫群落的结构和时序动态。共采集到昆虫标本7803号,经鉴定隶属于9目58科135种。研究表明:不同林分内昆虫种类的Shannon-Wiener多样性指数(H')、Pielou均匀度指数(J')和Margalef丰富度指数(D)均表现为特种用途林>经济林>防护林,而Simpson优势集中度指数(C)则表现为防护林<经济林<特种用途林;昆虫群落结构的时间动态研究显示,6—9月昆虫群落的目数、科数、种数、个体数及多样性指数最高,2月的均匀度指数最高,优势集中度指数则在1月最高。

In order to clarify the species and community structure of forest insects in Zhangjiagang City,3 types of stand were investigated to analysis the structure and temporal dynamics of insect communities from July 2015 to July 2016 by using the richness,dominance,similarity index and diversity index. Totally 7803 insects were collected,belonging to 135 species,58 families and 9 orders. By contrast,diversity index（ H＇）,evenness index（ J＇） and species index（ D） were found all in such a decreasing order as special purpose foresteconomic forestshelter forest while Simpson dominance index（ C） in such a order as shelter foresteconomic forestspecial purpose forest.The temporal dynamics of community structure of insect populations showed that the family number,species number,individual number and diversity were the highest from June to September,J＇ was highest in February and C was highest in January.