【摘要】 运用群落生态学原理和方法,于2010年4月至2011年4月系统调查了广西北流市九代村龙眼园中主要昆虫种群数量动态,并利用相对丰富度、优势度指数、优势集中性指数、多样性指数和均匀度,分析了其群落结构及其亚群落结构季节性动态变化。结果表明,龙眼园中昆虫群落结构有10目68科162种。种类数以鳞翅目最多,个体数以直翅目最多。龙眼园中昆虫群落多样性指数以草地最高,而均匀度的时间格局最高值在夏季出现;园中天敌、害虫和中性昆虫3个亚群落的多样性指数和均匀度都以夏季最高。更多还原

【Abstract】 Community dynamics of major insect in Didouchong longan orchard of Jiudai county in Beiliu city of Guangxi province were investigated according to the theory and method of community ecology from April,2010 to April,2011.The community structure dynamics was analyzed based on collected data on relative richness,dominance index,diversity index and evenness.The results showed that there were 162 species of insect belonging to 68 families and 10 orders in longan orchard.The quantity of insect species in Lepidoptera and individual quantity of Orthoptera were largest.The diversity index of the insect community was maximum in grassland,and the evenness was the highest in summer.Diversity index and evenness of three sub-communities of natural enemy,pest and neuter insect in the orchard were also the highest in summer.更多还原