辽宁蛇岛昆虫多样性初步研究

A Preliminary Study on Insect Species Diversity in Snake Island in Liaoning

辽宁蛇岛是东北亚候鸟迁徙的通道,是两万余条蛇岛蝮在世界上的唯一栖息地.通过对蛇岛昆虫多样性的实地调查,整理并记录了蛇岛的昆虫种类,分析了蛇岛昆虫多样性特点.比较了蛇岛与中国5个岛屿的昆虫优势目的种类,并探究了岛屿面积与昆虫物种多样性的关系.结果显示,辽宁蛇岛共有昆虫9目33科53属55种;经比较,蛇岛的优势目种类与其它5岛相似,推测岛屿昆虫的优势目与岛屿的地理位置、离岸距离、岛屿面积无显著联系;此外,这6个岛屿的昆虫物种数量与面积的关系不符合Mac Arthur等提出的岛屿生物地理学理论,推测可能有小岛屿效应存在,也可能是因为岛屿生物地理学理论自身的局限性所致.

Liaoning Snake Island is a passage in northeast Asia for bird migration, and the only habits of Gloydius shedaoensis as well. With the field investigation of insect diversity of Liaoning Snake Island, the species of insects was organized and recorded and also the characteristics of insect diversity of Snake Island were analyzed. The species of the dominant orders in Snake Island was compared with the other five islands. The relationship between island area and insect diversity was explored. The results of the investigation show that： there were 55 insect species belonging to 9 orders,32 families and 53 genera. By comparison, the species of the dominant orders of Liaoning Snake Island was similar to the other five islands suggesting that there were no significant relationships between the dominant orders of insect-island and island location, distance from shore and island area. Additionally, the relationship between the number of the insect species and the area of the island is not in accordance with the theory of island biogeography proposed by MacArthur et al. Maybe there is small island effect, or perhaps because of the limitations of the theory of island biogeography itself.