白洋淀湿地水生甲虫资源与发生概况

Resources and occurrence of aquatic beetles in Baiyangdian Wetlands

本文是关于白洋淀湿地水生甲虫的首次研究报道。作者于2012年7-8月和2013年5-10月分别对白洋淀湿地不同生境中水生甲虫进行考察,共获得标本1752头,隶属于2亚目7科25属28种,其中肉食亚目沼梭甲科、伪龙虱科和鼓甲科各1属1种,龙虱科6亚科12属12种;多食亚目牙甲科2亚科8属11种,叶甲科和长泥甲科各1属1种。就数量而言,牙甲科1314头,最多,占总头数的75%,发生频率在7月上旬达到最高值;龙虱科300头,占总数的17.12%,最高值呈现在7月下旬;其他类群的发生主要集中在7月,但种群数量较少。另外,编制了白洋淀湿地水生甲虫的各级分类阶元识别检索表。

Aquatic beetles were investigated at different types of habitats in Baiyangdian Wetlands during July to August of 2012 and May to October of 2013. This investigation resulted in the water beetles communities collected in Baiyangdian Wetlands, including 28 species which belongs to 25 genera, 7 families, and two suborders. Of the species, there were 12 taxa belonging to 12 genera in Dytiscidae, and 11 taxa to 8 genera in Hydrophilidae, and only one taxa to one genus in each of 5 families, such as Haliplidae, Gyrinidae, Heteroceridae, etc. In this investigation, 1753 individuals were collected in total. The number of individuals of Hydrophilidae was 1314, accounting for 75% ; and that of Dytiscidae was 300, 17.12%. In terms of occurrence, population quantity of Hydrophilidae reached the highest in the early July and Dytiscidae in the late July, and other groups mainly occurred in July. In addition, dichotomous keys of aquatic beetles collected in Baiyangdian Wetlands were presented.