宁夏贺兰山蛾类区系调查及多样性分析

The Fauna and Diversity of Moths in Ningxia Helan Mountain

通过调查,共获得贺兰山自然保护区蛾类标本7 000余号.已鉴定的种类为15科144属186种,夜蛾科的种数最多,其次是螟蛾科、尺蛾科和卷蛾科.区系分析结果表明,贺兰山自然保护区蛾类以古北种为主,表明其具有很强的古北区特征,广布种次之,东洋种最少.根据中国地理区划,贺兰山蛾类除了自身的蒙新区特点外,与东北区、华北区联系最为密切.4个生境的多样性指数H′由大到小依次为山麓荒漠化草原、山前草原化荒漠、针叶林层、山地草原;均匀度指数J′由大到小依次为山麓荒漠化草原、山地草原、山前草原化荒漠、针叶林层;优势集中性指数C由大到小依次为山地草原、山麓荒漠化草原、针叶林层、山前草原化荒漠.

In four habitats of the Helan Mountain National Nature Reserve,more than 7 000 moths insect specimens had been collected,they belong to 15 families,144 genera and 186 species.The biggest group is Noctuidae,Pyralidae and Tortricidae takes the second place,and the other families are the least.The main fauna elements of moths are Palaearctic Region species,the widely distributive species takes the second place,and Oriental Region species are the least.In insect fauna of China,all of the moths in Helan Mountain have the characteristic of Mongolia-Xinjiang Region,and have close relation with Northeast China Region and North China Region.The diversity index in different habitats shows that piedmont desert steppe〉mountainfront steppificated desert〉coniferous forest〉mountain steppe.The uniformity index in different habitats shows that piedmont desert steppe〉mountain steppe〉mountainfront steppificated desert〉coniferous forest.The dominant concentration index shows that mountain steppe〉piedmont desert steppe〉coniferous forest〉mountainfront steppificated desert.