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2017—2018年长江口海域夏季浮游动物群落的年际变化及影响因素
引用本文:沈海琪,许永久,王健鑫,袁锴彬,严泽宇,周富源,侯伟芬.2017—2018年长江口海域夏季浮游动物群落的年际变化及影响因素[J].中国水产科学,2020,27(3):327-335.
作者姓名:沈海琪  许永久  王健鑫  袁锴彬  严泽宇  周富源  侯伟芬
作者单位:1. 浙江海洋大学水产学院, 浙江 舟山 316022;2. 浙江海洋大学海洋科学与技术学院, 浙江 舟山 316022
基金项目:国家海洋局海洋生态环境科学与工程重点实验室开放基金项目(MESE-2018-01);浙江省大学生科技创新活动计划暨新苗人才计划(2018R411006);浙江海洋大学“水产”省一流学科开放课题(20160010).
摘    要:根据2017―2018年夏季长江口海域浮游动物连续站及断面站的数据,应用典范对应分析(CCA)研究了浮游动物的种类组成、主要类群数量年际变化、昼夜变化、空间变化及与环境因子的关系。结果显示,2017年和2018年夏季分别鉴定浮游动物49种和50种,两年共同优势种为中华哲水蚤(Calanus sinicus)、太平洋纺锤水蚤(Acartia pacifica)、精致真刺水蚤(Euchaeta concinna)、肥胖箭虫(Sagitta enflata)和肥胖三角溞(Evadne tergestina)。相似性百分比分析(SIMPER)分析表明,年间浮游动物群落差异的主要贡献种为肥胖三角溞、中华哲水蚤、海樽类(Thaliacea),CCA分析表明,表层温度(TS)、底层盐度(Sb)和表层叶绿素a (CS)是影响年际间浮游动物类群差异的主要环境因子,解释了两年浮游动物类群变异的47.51%。根据2018年叶绿素a空间分布,将站位分为叶绿素a锋面区和非锋面区,L1~L2站为非叶绿素a锋面区,L3~L4站为叶绿素a锋面区。浮游动物群落在二者空间差异的主要贡献种为肥胖三角溞、背针胸刺水蚤(Centropages dorsispinatus)、精致真刺水蚤,CCA分析表明,底层盐度(Sb)、底层温度(Tb)和表层叶绿素a (CS)是影响浮游动物类群空间变化的主要环境因子,解释了2018年浮游动物类群组成变异的56.31%。该结果表明,引起盐度和叶绿素a变化的长江冲淡水径流量对浮游动物群落结构年际变化造成了重要影响。

关 键 词:长江口  浮游动物群落结构  年际变化  空间变化  环境因子  CCA
修稿时间:2020/3/11 0:00:00

Interannual variation of and factors influencing the summer zooplankton community in the Yangtze River Estuary in the summers of 2017-2018
SHEN Haiqi,XU Yongjiu,WANG Jianxin,YUAN Kaibin,YAN Zeyu,ZHOU Fuyuan,HOU Weifen.Interannual variation of and factors influencing the summer zooplankton community in the Yangtze River Estuary in the summers of 2017-2018[J].Journal of Fishery Sciences of China,2020,27(3):327-335.
Authors:SHEN Haiqi  XU Yongjiu  WANG Jianxin  YUAN Kaibin  YAN Zeyu  ZHOU Fuyuan  HOU Weifen
Institution:1. School of Fisheries, Zhejiang Ocean University, Zhoushan 316022, China;2. Marine Science and Technology College, Zhejiang Ocean University, Zhoushan 316022, China
Abstract:In this study, we analyzed the species composition, ecological distribution, and spatial, diurnal, and interannual variation of zooplankton in the Yangtze River Estuary in the summers of 2017-2018. We used a 24 time-series analysis, a section stations survey, and the canonical correspondence analysis (CCA) to reveal the relationship between the abundance of dominant groups and the environmental variables. The results showed that there were 49 and 50 zooplankton species in the summers of 2017 and 2018, respectively, of which, Calanus sinicus, Acartia pacifica, Euchaeta concinna, Sagitta enflata, and Evadne tergestina were the dominant species. The SIMPER analysis indicated that the main contributors to the interannual variation of the zooplankton community were Evadne tergestina, Calanus sinicus, and Thaliacea. CCA analysis showed that the surface temperature, bottom salinity, and surface chlorophyll a were the main environmental factors affecting the interannual variation of zooplankton groups, explaining 47.51% of the two-year zooplankton variation. Based on the spatial distribution of chlorophyll a in 2018, the stations were divided into chlorophyll a frontal and non-frontal area, which contained the L1-L2 and L3-L4 stations, respectively. The main contributors to the spatial differences of the zooplankton community were Evadne tergestina, Centropages dorsispinatus, and Euchaeta concinna. CCA analysis showed that the bottom salinity, bottom temperature, and surface chlorophyll a were the main environmental factors affecting the spatial variation of zooplankton groups, accounting for 56.31% of the variation in the composition of zooplankton in 2018. The results indicated that the different runoffs of the Yangtze river, diluting the water and causing changes in salinity and chlorophyll a, had an important impact on the interannual variation of the zooplankton community.
Keywords:Yangtze River Estuary  zooplankton community structure  interannual variation  spatial variation  environmental factors  CCA
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