太和县桔梗田主要昆虫群落动态变化初步研究

2013年4月至8月在桔梗生长期分5次对太和桔梗田昆虫的种群数量动态进行了系统调查,并利用物种丰富度、优势度指数、多样性指数和均匀度等分析了昆虫群落动态变化.结果显示植食性害虫主要有金针虫类、蛴螬类、地老虎类、蚜虫类、蝗虫类等;捕食性昆虫主要有食蚜蝇类、蜘蛛类以及草蛉类等.群落的总个体数和丰富度随调查时间有一定的变化,4、5、6月份的物种丰富度及均匀度指数相对较高,优势度指数相对较大的是7、8月份.其中植食性昆虫与总的昆虫分析结果相近,捕食性昆虫略有差异.昆虫的总个体数随时间序列呈上升趋势,昆虫物种丰富度随着调查时间呈下降之势.总体来说相邻日期之间群落相似性更大,并呈越来越远的趋势.

Community dynamics of major insects in balloon flower fields of Taihe County

Community dynamics of major insects in balloon flower fields of Taihe County were investigated from April to Au- gust in 2013 in accordance with the theory and method of community ecology. Insect communities were analyzed based on such fac- tors as species richness, dominance index, diversity index and evenness. The results showed that herbivorous insects include wire- worms, grubs class, cutworms, aphids, grasshoppers, etc. and predatory insects are mainly hoverflies, spiders and lacewings, etc. The total number of individuals and community richness vary with investigation time. The species richness and evenness index are relatively high in April, May, and June. The dominance index is relatively large in July and August. The change is not great. The species richness displays downward trend with the investigation time moving on. Overall, the similarities of the communities between adjacent investigation times are bigger, and tend to be more and more distant.