峨眉山蝗虫的垂直分布及区系分析

Vertical Distribution and Fauna Analysis of Acridoidea in Emei Mountain

峨眉山拥有丰富的昆虫资源,研究昆虫的分布及区系有助于深入了解峨眉山的物种多样性和昆虫进化。本文首次报道了峨眉山直翅目昆虫的区系成分和垂直分布规律,发现峨眉山蝗总科昆虫共有6科27种,垂直分布特点明显：海拔1600 m以上几乎没有蝗虫分布,1000～1600 m以中小型短翅蝗虫为主,550～1000 m以中大型长翅蝗虫为主。在区系上,以东洋界的种类为主,占63%;特有种次之,占18%;广布种再次之,占15%;古北界的种类最少,占4%。

Emei Mountain had rich insect resource, and the study of distribution and fauna of insects were helpful for un- derstanding the species diversity and the insect evolution. This paper reported the fauna composition and vertical distribution of Orthoptera in Emei Mountain for the first time, and the results showed that there were 6 families and 27 species of Acri- doidea in Emei Mountain, which had evident vertical distribution characteristics. No locusts existed in the area of more than 1600 m asl., the small-and medium-winged locusts were mainly distributed in the area between 1000 - 1600 m asl., and the medium-and long-winged locusts were mainly distributed in the area between 550 - 1000 m asl. The fauna of Acridoidea in Emei Mountain were mainly composed of Oriental realm species （63%） , followed by endemic species （18%） , Eurytopic species （ 15% ） and Palaearctic realm species （4%）.