关键词: QuickBird影像, 碳储量, 逐步回归

Abstract: In order to understand the utilization of intertidal water area by fishes, an investigation with fyke was conducted on the fish community structure in the intertidal area of Acipenser sinensis Natural Reserve in Yangtze River estuary in May, August and November 2010. A total of 28 fish species belonging to 16 families and 10 orders were collected, among which, Lateolabrax maculates, Liza haematocheila, and Cynoglossus gracilis were the dominant species. Cypriniformes had the largest species number, followed by Perciformes. The fish communities could be classified into 6 ecological groups, i.e., estuarine species, marine stragglers, catadromous species, anadromous species, marine migrants, and freshwater species, and the estuarine species and marine migrants took up distinct advantage. Cluster analysis showed that there was a significant difference in the fish communities in autumn and in springsummer, and L. haematocheila, L. maculates, and Acanthogobius ommaturuscontributed greatest to the seasonal difference. PCA indicated that the fish communities in summer were mainly determined by marine migrants, while those in autumn were mainly determined by estuarine species. The differences in the feeding and growth of the juveniles of the marine migrants and estuarine fishes could be the main reason for the significant seasonal difference in the fish communities in the study area.  

Key words: QuickBird image, carbon reserve, stepwise regression.