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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。
Based on the principles and methods of community ecology, the population dynamics of major insects in Longyan Park of Jiudai Village, Beiliu City, Guangxi Province were systematically investigated from April 2010 to April 2011. The relative abundance, dominance index, dominant concentration Index, diversity index and evenness, analyzed the seasonal dynamics of community structure and its sub-community structure. The results showed that there are 162 orders of 10 orders, 68 families and 10 insect communities in longan garden. Lepidoptera species number up to several individuals to the largest number of Orthoptera. In the longan garden, the diversity index of insect community was the highest in grassland, while the highest value of the time pattern of evenness appeared in summer. The diversity index and evenness of the three sub-communities in natural enemies, pests and neutral insects were the highest in summer.