中国水产科学2017，Vol.24Issue(2)：209-219,11.DOI:10.3724/SP.J.1118.2017.16197
温州南部沿岸海域鱼类群落特征及其与环境因子的关系
Fish community structure and its relationships with environmental factors in the southern inshore waters of Wenzhou
摘要
Abstract
The southern coastal waters of Wenzhou is in the mid to southern parts of the East China Sea. This area is influenced by the high temperature and high salinity conditions of the Taiwan Warm Current, the low salinity of the Zhejiang Coastal Current, and the southern coastal upwelling. These waters are rich in nutrients and baitfish and are highly diverse with fish species. The area is a typical ecological region of the East China Sea shelf. Cluster analysis, non-metric multidimensional scaling, and a diversity index was used to analyze the patterns of commu-nity composition, diversity, and community structure based on data from two fishery resources investigations conducted in May (spring) and September (autumn) 2015 in the area. The results identified 47 species in the southern coastal waters of Wenzhou, which belonged to 41 genera, 27 families, nine orders, and two classes. Warmwater and warm temperate species were dominant, and Perciformes were the most abundant, with 26 species, followed by Clupeiformes, with six species. The third most frequent group was Tetraodontiformes, with four spe-cies. The dominant species in spring were Engraulis japonicas,Pampus echinogaster, Amblychaeturichthys hex-anema, and Collichthys lucidus, accounting for 49.3% of the total catch. The dominant species in autumn were Harpodon nehereus,Collichthys lucidus, and Polynemus sextarius, accounting for 50.8% of total catch.Engraulis japonicas, Decapterus maruadsi, Psenopsis anomala, Harpodon nehereus, Ilisha elongate, and Polynemus sex-tariuswere typically found at all stations in both seasons, and they were the major divergent species causing community differences among stations. Pearson's correlation analysis indicated that the richness index (D) and the Shannon–Wiener diversity index (H') were positively correlated with dissolved oxygen, salinity, and temperature. A canonical correspondence analysis suggested that the main environmental factors affecting the spatial patterns of fish assemblages were pH, depth, and salinity. pH represents the sum of some of the chemical properties in wa-ter and is the result of interactions among factors. pH can be affected by salinity and temperature. The canonical correspondence analysis results showed a division in the fish community in spring, which was likely due to influx of the high temperature and high salinity water in the Taiwan Warm Current. This current forms an obvious salin-ity gradient in the local coastal strip, which further affected the division of the spring fish community. The Taiwan Warm Current retreated in autumn, and the lower temperature and lower salinity of the Zhejiang and Fujian Coastal Currents gradually carried a large amount of silt into the study area. Therefore, whether temperature, sa-linity, and suspended particles affected the fish community structure requires further investigation.关键词
鱼类/物种多样性/群落结构/环境因子/典范对应分析Key words
fish/species diversity/community structure/environmental factors/canonical correspondence analy-sis (CCA)分类
农业科技引用本文复制引用
董静瑞,胡成业,水玉跃,田阔,杜肖,水柏年..温州南部沿岸海域鱼类群落特征及其与环境因子的关系[J].中国水产科学,2017,24(2):209-219,11.基金项目
国家自然科学基金项目(41006075) （41006075）
浙江省软科学研究重点项目(2015C25018) （2015C25018）
浙江省重中之重学科"海洋科学学科"项目. （）
