北京地区蜻蜓区系及分布

FAUNAL ANALYSIS AND DISTRIBUTION OF DRAGONFLIES IN BEIJING

20 0 1— 2 0 0 3年对北京地区蜻蜓资源进行了调查 .统计表明 ,北京地区分布的蜻蜓目昆虫共计 2亚目 9科 35属 5 0种 .其区系组成的特点是 :古北成分占优势 ,有 2 9种 ,占总数的 5 8% ;东洋区的种类相对贫乏 ,有 10种 ,仅占总数的 2 0 % ;广布种有 11种 ,占总数的 2 2 % .依据蜻蜓栖息地在水文条件、水质及水生植被类型上的地域性差异 ,可将北京地区蜻蜓的生态分布划分为平原水域、山区水域和广泛分布

According to the survey of dragonflies in Beijing from 2001—2003, a total of 50 species of Odonata ware reported, belonging to 2 suborders 8 families and 25 genus. As to the faunal composition of dragonflies in Beijing, there are 29 species belonged to Palaearctic, accounted for 58% in total; only 10 species(20%)to Oriental realm; the rest 11 species to cosmopolitan made up of 22%. Three distribution types of Odonata in this area are classified based on habitat differences of hydrological features, water quality and aquatic vegetation in Beijing. They are plain type, mountain type and widespread.