摘要
为探究长江口邻近海域浮游动物群落结构、种类组成、主要物种及与环境因子的关系,2023年4月7—10日,在长江口邻近海域(N30.0°~31.6°,E122.9°~124.8°)选10个站位进行了浮游动物群落结构调查。结果表明,长江口邻近海域春季浮游动物群落结构稳定,鉴定出浮游动物共6门、12个类群、39种,浮游幼体及鱼卵、仔稚鱼共22类(种)。桡足类为绝对优势类群,共鉴定出19种,占浮游动物总种数的31.2%;第2优势类群为水母类,鉴定出5种,占浮游动物总种数的8.2%。南部香农-维纳多样性指数与均匀度指数水平高,向北部海域逐渐降低,丰富度指数分布格局与种类数分布相似,近岸高外海低。浮游动物群落丰度和环境因子的相关分析表明,盐度影响2023年春季长江口邻近海域的浮游动物群落丰度。本研究结果可为了解长江口浮游生物生态机制提供数据支撑。
In order to understand the zooplankton community structure,species composition,major species and the relationship between zooplankton community structure and environmental factors in the waters adjacent to Changjiang River Estuary,the zooplankton community structure survey was carried out at 10 stations in the waters adjacent to the Changjiang River Estuary(N 30.0°—31.6°,E 122.9°—124.8°)in accordance with the Marine Survey Specification Part 6:Marine Biological Survey from April 7 to 10,2023.The results showed that the zooplankton community structure was stable in the waters adjacent to the Changjiang River Estuary in spring,with a total of 6 phyla,12 taxa and 39 species of zooplankton as well as 22 types of zooplankton larvae and eggs,juvenile fishes,with the absolute dominant copepods group,accounting for 31.2%of the total zooplankton species.The second dominant group was jellyfish,with 5 species identified,accounting for 8.2%of the total zooplankton species.The horizontal distribution of the Shannon-Wiener′s diveristy index and evenness index showed a trend of high in the south and decreasing in the north,while the distribution pattern of the abundance index was similar to the distribution of the number of species,with the distribution trend of high inshore and low offshore.The relationship between zooplankton community abundance and environmental factors revealed that salinity,as the main environmental factor,affected the zooplankton community abundance in the waters adjacent to the Changjiang River Estuary in spring 2023.The findings provide data support for understanding of the ecological mechanism of zooplankton in the Changjiang River Estuary.
作者
李露萍
许永久
周畅
张子硕
刘万金
张曜绎
何非凡
俞佳
LI Luping;XU Yongjiu;ZHOU Chang;ZHANG Zishuo;LIU Wanjin;ZHANG Yaoyi;HE Feifan;YU Jia(College of Fisheries,Zhejiang Ocean University,Zhoushan 316022,China)
出处
《水产科学》
北大核心
2025年第6期962-970,共9页
Fisheries Science
基金
浙江省自然科学基金资助项目(LY20C030004)
浙江海洋大学大学生创新创业项目(2023-A-020).
关键词
浮游动物
长江口
群落结构
环境因子
zooplankton
Changjiang Estuary
community structure
environmental factor
