于杰, 邹建伟, 陈国宝. 广西银滩南部海域海洋牧场鱼类群落结构特征及其与环境因子的关系[J]. 南方水产科学. DOI: 10.12131/20240102
引用本文: 于杰, 邹建伟, 陈国宝. 广西银滩南部海域海洋牧场鱼类群落结构特征及其与环境因子的关系[J]. 南方水产科学. DOI: 10.12131/20240102
YU Jie, ZOU Jianwei, CHEN Guobao. Characteristics of fish community structure and its relationship with environmental factors in marine ranching zone in southern area of Yintan in Guangxi[J]. South China Fisheries Science. DOI: 10.12131/20240102
Citation: YU Jie, ZOU Jianwei, CHEN Guobao. Characteristics of fish community structure and its relationship with environmental factors in marine ranching zone in southern area of Yintan in Guangxi[J]. South China Fisheries Science. DOI: 10.12131/20240102

广西银滩南部海域海洋牧场鱼类群落结构特征及其与环境因子的关系

Characteristics of fish community structure and its relationship with environmental factors in marine ranching zone in southern area of Yintan in Guangxi

  • 摘要: 适时评价国家级海洋牧场示范区的鱼类资源状况,对推进海洋牧场建设具有重要意义。基于2022年4月广西银滩南部海域海洋牧场渔业资源调查数据,分析了鱼类资源特征、群落结构及其与环境因子的相关性。结果显示,示范区鱼类数量密度、生物量密度和种类数均高于对照区。示范区和对照区鱼类物种组成在种级水平上为中等不相似,另外,2个区域鱼类群落均受到一定程度的干扰。研究区鱼类群落可划分为4个具有显著性差异的类群 (P<0.05),分别位于示范区B区和对照区南部站位 (类群I)、对照区北部站位 (类群II)、示范区A区和B区交界处 (类群III) 和示范区A区 (类群IV),类群I和III的平均相异性指数为53.88%,贡献率排前3位的分歧种为吉打副叶鲹 (Alepes djedaba)、蓝圆鲹 (Decapterus maruadsi)和竹荚鱼 (Trachurus japonicus),类群III和IV的平均相异性指数为48.85%,贡献率排前3位的分歧种为竹荚鱼、短吻鲾 (Leiognathus brevirostris) 和花斑蛇鲻 (Saurida undosquamis)。水温和化学需氧量是显著影响研究区鱼类群落结构的主要环境因子,溶解氧和浮游植物密度的影响稍弱。

     

    Abstract: Timely assessment of fish resources in state-level marine ranching demonstration area is important in promoting the construction of marine ranching. Based on the fishery resources survey data in the southern area of Guangxi Yintan in April 2022, we analyzed the characteristics of fish resources, community stability, fish community structure and their correlation with environmental factors. The results show that the fish individual density, biomass density and number of species in the demonstration area were higher than those in the control area. The fish species composition in the demonstration and control area was moderately dissimilar at the species level. In addition, fish communities in both areas were somewhat disturbed. The fish community in the survey area was divided into four significantly different clusters (P<0.05), which were located in the southern station of the demonstration area B and the control area (Cluster I), the northern station of the control area (Cluster II), the junction of the demonstration area A and B (Cluster III), and the demonstration area A (Cluster IV). The average dissimilarity index of Cluster I and III was 53.88%, and the divergent species that ranked in the top three in terms of their contribution were Alepes djedaba, Decapterus marauds and Trachurus japonicus, while the average dissimilarity index of Cluster III and IV was 48.85%, with the top three divergent species contributing to the dissimilarity index being the T. japonicus, Leiognathus brevirostri and Saurida undosquamis. Water temperature and chemical oxygen demand were the main environmental factors significantly influencing the structure of the fish community in the survey area, while dissolved oxygen and phytoplankton density had a slightly weaker effect.

     

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