Abstract: Procambarus clarkii is native to southern USA and northern Mexico,and regarded as one of the well-known invasive species. As one of the fishery economic resources, it has spread around the world. Owing to its wide habitat adaptability, rapid growth, and high reproduction rate, P. clarkii can establish wild populations rapidly. The studies in recent decade indicated that P. clarkii invasion had given great threat on the survival of native aquatic plants, amphibian, and aquatic invertebrate, and decreased the local biodiversity via predation and resource competition. Since P. clarkii is one kind of importan
t fishery species, it will continue to spread with the help of human. In order to understand and to decrease the ecological impact of P. clarkii’s invasion
 on local habitats, following studies are urgent: 1) ecological damage of P. clarkia in China, 2) population regulation and control of P. clarkia, and 3) ecological restoration on damaged habitats by P. clarkii.

Key words: Aphis gossypii, Erigonidium graminicola, Spatial pattern, Geostatistics