栗园害虫与天敌群落结构及季节动态研究

根据栗园害虫与天敌群落物种的组成和数量,按照营养关系和系统分类的方法,将群落划分为植食类、捕食类、寄生类和中性类亚群落,每个亚群落分成不同的功能类群.采用群落分析的多个参数比较分析了群落的结构和季节动态.结果表明,安徽栗园害虫与天敌178种,101科,植食类亚群落相对丰盛度为0.9330,4～10月份为0.7903～0.9698,11月份最低,为0.1509;捕食类亚群落相对丰盛度为0.0406,4～10月份为0.0202～0.1954,11月份最高,为0.8409;栗园总群落的优势集中性为0.2564,各亚群落的优势集中性表现为植食类>捕食类>寄生类;栗园植食类亚群落的多样性和均匀度与总群落一致,呈低-高-低-高的变化趋势;捕食类亚群落的多样性和均匀度动态基本上呈稳中有降的变化趋势.

Seasonal dynamic of pests and natural enemy communities in chestnut orchard

Based on the nutritional relationship and system taxonomy,the arthropod communities of chestnut orchard were divided into four sub-communities,which were phytophages,predators,patasitoids and neutralities.Every sub-community was divided into different functional groups.A number of communities were used to explore the structure and the seasonal dynamics of community.The results showed that there were 178 species belonging to 101 families.The relative abundance of phytophages was 0.9330,from April to October,which was 0.7903~0.9698;in November which was the lowest(0.1509).The relative abundance of predators was 0.0406,from April to October which was 0.0202~0.1954;in November which was the highest(0.8409).The dominant concentration of arthropod communities was 0.2564.The dominant concentration of sub-communities was phytophages>predators>parasitoids.The diversities and evenness of phytophages showed the same tendency with the total community,from low to high,then low and high again.The diversity and evenness of predator sub-community was mainly steady,with occasionally reducing.