论文部分内容阅读
根据2014年8月在黄海进行的渔业资源和环境综合调查数据,应用相对重要性指数、生物多样性指数和多元统计分析等方法对黄海夏季虾类群落结构及其与环境因子的关系进行了研究.结果表明:本次调查共捕获虾类20种,隶属于3目10科16属.各调查站点虾类相对资源丰度为13~45047 g·h-1,平均资源丰度为6838 g·h-1.优势种为脊腹褐虾,常见种为中华安乐虾,偶见种为戴氏赤虾、葛氏长臂虾、口虾蛄.各站点多样性指数(H)变化范围为0.007~1.538,平均值为0.391;丰富度指数(D)变化范围为0.101~1.138,平均值为0.374;均匀度指数(J)变化范围为0.006~0.947,平均值为0.298.等级聚类分析(Cluster)与非度量多维标度分析(MDS)表明,调查范围基本以45 m等深线为界将所有站点分成两个组群:冷水团组群(Ⅰ)和沿岸组群(Ⅱ),ANOSIM分析表明两组群差异极显著.BIOENV分析表明,影响黄海夏季虾类群落空间结构的最主要环境因子是底层水温与底层盐度.黄海夏季虾类群落以冷水团组群占绝对优势,黄海冷水团对黄海夏季虾类群落的分布格局具有决定性的影响.
Based on the comprehensive survey of fishery resources and environment conducted in the Yellow Sea in August 2014, the relationship between summer shrimp community structure in the Yellow Sea and its environmental factors was studied by means of relative importance index, biodiversity index and multivariate statistical analysis The results showed that 20 species of shrimp were collected in this survey, belonging to 3 orders, 10 families and 16 genera.The relative abundance of shrimp in each survey site was 13-4 45047 g · h-1, and the average resource abundance was 6838 g · h-1. The dominant species was Ch. shrimp, the common species was Sinorama shrimp, and the rare species was Dai chi shrimp, Gekko shrimp, Shrimp shrimp. The diversity index (H) varied from 0.007 ~ 1.538, with an average value of 0.391; the abundance index (D) ranged from 0.101 to 1.138 with an average of 0.374; the evenness index (J) ranged from 0.006 to 0.947 with an average of 0.298. Cluster analysis ) And non-metric multidimensional scaling analysis (MDS) indicate that the survey area is basically divided into two groups based on the 45 m contour line: the cold water mass group (I) and the coastal mass group (II), the ANOSIM analysis Indicating that the two groups of extremely significant differences.BIOENV analysis shows that the impact of the summer shrimp community in the Yellow Sea spatial structure of the most Environmental factors are the underlying bottom temperature and salinity. Yellow Sea shrimp with cold delegations community group is dominated by the Yellow Sea cold water mass has a decisive influence on the distribution pattern of the Yellow Sea shrimp communities.