黄河口及其邻近水域夏季鱼类群落空间格局及其与环境因子的关系

Spatial pattern of fish assemblage and the relationship with environmental factors in Yellow River Estuary and its adjacent waters in summer

基于2013年夏季(6、7、8月)在黄河口及其邻近水域进行的渔业资源底拖网调查,应用多元分析方法研究了黄河口水域夏季鱼类群落空间结构,以及其与环境因子的关系.结果表明:该海域夏季共捕获鱼类44种,隶属于11目25科40属,以暖温性和底层鱼类为主.经聚类分析,该海域夏季各月鱼类群落可大体划分为3个站位组.经单因子相似性分析(ANOSIM),黄河口不同水域鱼类群落物种组成存在显著差异.相似性百分比分析表明,矛尾虾虎鱼、斑鰶、短吻红舌鳎、蓝点马鲛和日本鳀等是各月份各站位组的典型种及造成不同站位组间群落差异的主要分歧种.典范对应分析(CCA)表明,影响夏季鱼类群落空间结构的主要环境因子为盐度、温度和深度.

The fish community structure and its relationship with the environment in the Yellow River Estuary and its adjacent waters were studied using the data collected from bottom trawl surveys in summer（ June,July,August）,2013. A total of 44 fish species were sampled in the survey,belonging to 40 genera,25 families,and 11 orders,and mainly composed of warm temperate and demersal fishes. Cluster analysis showed that fish assemblage in Yellow River Estuary in summer could be divided into three groups. ANOSIM（ analysis of similarity） indicated that the fish species composition in Yellow River Estuary and its adjacent waters varied significantly among different groups in summer. The SIMPER（ similarity of percentage） analysis revealed that Chaeturichthys stigmatias,Clupanodon punctatus,Cynoglossus joyneri and Engraulis japonica were the main species in each group and the primary discriminating species between groups for the fish assemblage in each month. The canonical correspondence analysis（ CCA） suggested that the main environmental factors affecting the spatial patterns of fish assemblage in summer were salinity,bottom water temperature and depth.