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 cond

ucted in North LuoRiver basin, and the community structure of insects (13 orde

rs,, 96 families, and 346 species) was analyzed integrating associated literature

s. The results showed that the orders with large proportion of insects included

Coleoptera (33.62%), Lepidoptera (25.80%) and Orthoptera (15.65%), and the ot

her 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 sho

wed that Tenebrionidae in Wuqi had the highest values of ShannonWiener diversi

ty, Margalef abundance and Pielou uniformity among the investigated locations, bu

t the lowest value of Simpson dominance, which was highest in Luochuan