论文部分内容阅读
对水蕹菜试验地进行为期5个月的调查研究,结果表明,水蕹菜实验地生态系统内节肢动物群落物种数为34种,其中害虫6种,天敌20种,中性虫8种,分别占整个群落的17.65%、58.82%、23.53%。物种丰富度15～22,生态优势度0.0981～0.2843,多样性指数1.7714～2.5654,均匀度指数0.6129～0.8634。群落动态分析,群落特征指数都有明显的时间变化。8月期间,生态优势度低,多样性和均匀度指数高,群落结构较合理。从害虫与天敌的时间动态变化对比看出,拟水狼蛛、中华狼蛛等天敌对主要优势害虫柑橘全爪螨、桃蚜等有明显的控制作用。
The results showed that there were 34 species of arthropod community in the aquatic ecosystem, including 6 species of pests, 20 species of natural enemies, 8 species of neutral insects, Accounting for 17.65%, 58.82% and 23.53% of the entire community respectively. Species richness ranged from 15 to 22, ecological superiority from 0.0981 to 0.2843, diversity index from 1.7714 to 2.5654, evenness index from 0.6129 to 0.8634. Community dynamics analysis, community characteristics index have obvious time changes. During August, the ecological dominance was low, the index of diversity and evenness was high, and the community structure was reasonable. According to the dynamic changes of pests and natural enemies in time, it can be seen that the predators such as Pirata subpiraticus and Tarantula chinense have obvious control effects on the main dominant pests such as Allium mite, Myzus persicae and so on.