关键词: 黄河口, 鱼类群落, 空间格局, 多元统计分析, 典范对应分析, 环境因子

Abstract: From 2010 to 2011, an investigation was conducted on the mosquitoes in the construction land (Ⅰ), rural land (Ⅱ), wetland (Ⅲ), forest land (Ⅳ), and arable land (Ⅴ) at 21 sites of Wuxi, Jiangsu Province of East China, aimed to understand the effects of different land use types on mosquito community. A total of 10 mosquito species belonging to 5 genera were found, with an average density being 67.94 ind·lamp^-1·h^-1. The dominant species in the land use types were Culex pipiens pallens in Ⅰ, C. tritaeniorhynchusin Ⅱ, C. pipiens pallens and C. tritaeniorhynchus in both Ⅲ and Ⅳ, and C. pipiens pallens, C. tritaeniorhynchus, Armigeres subalbatus, and Anopheles sinoensis in V. The mosquito density was in the order of Ⅱ> Ⅲ > Ⅴ >ⅣIV >Ⅰ, with a significant difference (P<0.05) among the land use types except between Ⅳ and I. The mosquito biodiversity was in the order of Ⅴ > Ⅳ > Ⅲ > Ⅱ >Ⅰ, being significantly
(P<0.05) higher in Ⅴ and Ⅳ than in Ⅲ, Ⅰ, and Ⅱ. At a similarity of 68%, all the land use types except Ⅳ and Ⅴ had an independent mosquito community. After the lands were transferred to constructed land, the dominant species became C. pipiens pallens  only, and the mosquito density and biodiversity decreased significantly. Under urbanization, C. pipiens pallens and C. pipiens pallensborn disease should be controlled, and the importance of controlling C. tritaeniorhynchus and C. tritaeniorhynchusborn disease would decline.

Key words: Yellow River Esturary, fish assemblage, spatial pattern, multivariate analysis, canonical correspondence analysis (CCA), environmental factors.