| Insect diversity is the important part of Biodiversity. Because of insects rich species, huge individual numbers, widespread and short life cycle, it's the proper materials for biodiversity research and even better experimental materials for depth exploration of species diversity.Zhenhai is in the north of Ningbo, Zhejiang Province, it's good place for biology research. In order to get the clear information of the insect resource and insect community structure of Zhenhai industrial estate in Ningbo,9 places were chosen for the survey depend on terrain feature of Zhenhai district during July to November 2008 and July to November 2010. Based on this,5 typical habitats were chosen:woodland, farmlands, artificial nursery, ecological park, industrial area, to sample and analysis numbers of species and individuals in each habitat type. This study was in order to provide scientific basis of insect diversity conservation and controlling pests, even more worth data for applying and monitoring the insect resource of industrial park. The findings are as below:1. The diversity of insect communities in Zhenhai industrial estate, Zhejiang province was investigated. A total of 11152 individuals belonging to 433 species,163 families,13 orders were recorded. The dominant groups were the Orthoptera, Coleoptera, Lepidoptera, Hemiptera, Homoptera, Hymenoptera and Diptera. The more dominant families of all orders were as follows:Chrysomelidae and Coccinellidae (Coleoptera); Pentatomidae and Coreidae (Hemiptera); Nymphalidae, Pyralidae and Lycaenidae (Lepidoptera); Tetrigidae (Orthoptera); Cicadellidae and Ricaniidae (Homoptera); Formicidae (Hymenoptera); Syrphidae (Diptera); Mantidae (Mantodea); Libellulidae and Coenafriidae (Odonata) etc. The dominant species were: Uroleucon formosanum, Aphis craccivora, Atractomorpha sinensis, Harmonia axyridis, Aedes albopictus, Stollia ventralis, Cletus punctiger and so on.2. Among different groups, phytophagous group was the most dominant one, approximately possess 76.52% individuals of all samples. Predatory, parasitic, coprophagy group and other groups were less on family, species and individual levels compared with phytophagous group. The proportion of phytophagous individuals to predatory individuals was nearly 7:1, it was supposed that plant had suffered certain damage.3. In different month, the species was the most diverse on August, secondly on July, from October to November showed decreasing trend.4. It was indicated that the trends of the changes in the biodiversity index was coincident with those of Pielou' eveness index and Species richness, according to study on the insect diversity in habitats and months. It showed that the community structure of insect in Zhenhai industrial estate was steady. The species diversity in the different habitats:artificial nursery>ecological park>woodland>industrial area> farmlands. The temporal pattern of monthly species diversity was that:July～August> October>November. Moreover, the species diversity of each month in 2010 was higher than that in 2008.5. Based on the analysis of community similarity among each two habitats showed that the five communities were low similarity. Among them, the similarity index (Cs) was the highest (0.3356) between the farmland to the ecological park, and the lowest (0.1772) between the woodland to the artificial nursery. The tight correlation between the distribution of insects and habitat suggests that habitat type is an important factor in insect diversity.In summary, the change characteristic of insect community presented different regularity because of the affects of climates and vegetations. The studies of above aspects were attempted to offer some scientific foundations for protection of insect diversity, effective guard-against pest. Moreover, it can provide rationable proposal to construct Zhenhai industrial estate.
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