甘肃白水江国家级自然保护区的尺蛾群落特征及区系分析

A Study on Community Characteristics of Geometridae and Insect Faunal in Baishuijiang Nature Reserve of Gansu Province

整理了1996年～2008年间从甘肃白水江国家级自然保护区采集到的尺蛾(Geometridae)标本1950号.共计鉴定出尺蛾187种及亚种(包括3个未定种和48个新记录物种及亚种),隶属5亚科110属.其中灰尺蛾亚科(Ennominae)有65属114种,为优势类群,属的优势度为59.09%,种的优势度为60.96%;花尺蛾亚科(Larentiinae)有25属42种,为次优势类群,属的优势度为22.73%,种的优势度为22.70%;常见类群为姬尺蛾亚科(Sterrhinae)和尺蛾亚科(Geometrinae),分别有3属7种和15属21种,种的优势度分别为3.78%和11.35%;星尺蛾亚科(Larentiinae)为罕见类群,有2属3种,属占1.82%,种占1.60%.结果表明,尺蛾科昆虫物种多样性丰富,群落结构复杂.区系组成特点是,属于古北界的有12种,占6.42%;属于东洋界的有52种,占27.81%;两界兼有123种,占65.78%.结果显示,白水江国家自然保护区在动物地理区划上属于东洋界向古北界的过渡地带.

1950 specimens of Geometridae collected in the Baishuijiang nature reserve,Gansu province.187 species of Sphingids （including 3 unnamed species and 48 species newly recorded in Gansu） belonged to 110 genera of 5 subfamilies.Ennominae was the dominant group which had a total of 114 species belonging to 65 genera.The dominance of the genus was 59.09% and that of the species was 60.96%.Larentiinae was the subdominant group,which had a total of 42 species belonging to 25 genera.The dominance of the genus was 22.73% and that of the species was 22.70%.Sterrhinae had 7 species in 3 genera and Geometrinal had 21 species in 15 genera;their dominances of the species were 3.78% and 11.35% respectively.Larentiinae was a rare group,which had 3 speices belonging to 2 genera;Thair diminances of the genus and the species were 1.82% and 1.60% respectively.The results showed that species were diversified and their community structure was complicated.An analysis of insect fauna materials showed that 52 species appertained to the Oriental Realm,making up 27.81% of our collection; 12 species belonged to the Palaearctic Realm,making up 6.42% of the total,and other 123 made up species about 65.78% of the total were scattering widely in the above two realms.The results showed that the Baishuijiang nature reserve was a transitional area from Oriental to Palaearctic Realm.