湖南八大公山自然保护区昆虫物种的多样性

于1981年5~9月份(建立省级自然保护区前),2005年4月底至5月初和8月底至9月初(建立保护区后),采用线路调查和典型标准地昆虫群落调查相结合的方法,鉴定整理出湖南八大公山国家级自然保护区昆虫22目,158科,1 179种,其中新属1个,新种67个,中国新记录33个;昆虫区系东洋种占优势,达66.58%,古北种次之占20.45%,广布种占12.97%;2005年的昆虫多样性指数(Simpson指数)一般均达到0.95~0.98,比1981年调查时有明显提高,而均匀度指数有一定程度的下降,说明八大公山国家级自然保护区昆虫多样性指数高,群落稳定性好,经建立保护区以来20多年的保护和管理,昆虫多样性有了明显改善.

Species Diversity of Insects in Badagongshan National Nature Reserve of Hunan Province

By way of route and sample plot investigation,and during the periods from May to September 1981 before the Province Reserve was founded,from late April to early May 2005 and from late August to early September of the same year after the Reserve was founded,1 179 species of insects belonging to 158 families in 22 orders from Badagongshan Reserve were identified.Among them,there are 1 new genera,67 new species and 33 new records.Results of faunal analysis show that 66.58% of insects in this reserve belong to Oriental,20.45% to Palearctic and 12.97% to Widespread;and that the insect diversity indices of Simpson reached 0.95 and even 0.98 in 2005 and they were higher than those in 1981 but its indices of evenness were lower.All these indicate that the indices are high,the insect community is stable,and the insect species diversity has evidently been improved after over 20 years' management since the founding of the reserve.