北洛河流域的昆虫多样性初步调查

Preliminary investigation of insect diversity in the North Luo-River basin

报道北洛河流域昆虫多样性的初步调查结果,同时结合文献资料分析北洛河流域13目96科346种昆虫的群落结构。研究表明,数量较多的有鞘翅目(33.62%)、鳞翅目(25.80%)、直翅目(15.65%),其它各目种类所占比例都小于10%,其中植食性类群占58.26%,而捕食性类群只占14.20%,同时6～7月份昆虫活动最频繁,之后随时间推移,昆虫数量逐渐减少。以拟步甲科为例的分析结果显示,吴起的拟步甲多样性指数、丰富度指数和均匀度指数均为最高,而优势度指数最低,洛川优势度指数最高。

Conservation and sustainable utilization of biodiversity have become a hot issue in the conservation of global environment,in which insect diversity is an important part.The preliminary investigation on insect diversity was conducted in North Luo-River basin,and the community structure of insects（13 orders,,96 families,and 346 species）was analyzed integrating associated literatures.The results showed that the orders with large proportion of insects included Coleoptera（33.62%）,Lepidoptera（25.80%）and Orthoptera （ 15.65% ）, and the other orders accounted for less than 10%. The phytophagous species accounted for 58.26%, and the predatory species accounted for only 14.20% . Activities of insects were most frequently in June ＆ July, and then, with time elapsing, the number of insects was gradually reduced. The results from the example of Tenebrionidae showed that Tenebrionidae in Wuqi had the highest values of Shannon-Wiener diversity, Margalef abundance and Pielou uniformity among the investigated locations, but the lowest value of Simpson dominance, which was highest in Luochuan.