摘要
基于2022年4月江苏盐城近岸海域浮游植物和水环境参数调查数据,探究该海区浮游植物群落结构特征及其影响因素。结果表明,春季江苏盐城近岸海域共鉴定浮游植物4门28属53种,包括硅藻42种,甲藻7种,蓝藻3种,金藻1种。浮游植物密度均值为(8286±3465)个/m^(3),多样性指数、丰富度指数及均匀度指数分别为2.88±0.35,2.00±0.39和0.95±0.02,主要优势种为长菱形藻(Nitzschia longissima)、琼氏圆筛藻(Coscinodiscus jonesianus)和圆海链藻(Thalassiosira rotula)。聚类分析显示,浮游植物群落可分为两个组群,呈现明显的地理分异特征。群落参数与环境因子相关性分析结果显示,浮游植物密度与盐度呈显著负相关(P<0.05,r=-0.457),与溶解无机氮呈显著正相关(P<0.05,r=0.449);浮游植物种类数、丰富度指数和多样性指数均与海水温度呈显著负相关(P<0.05,r分别为-0.494,-0.460和-0.441),表明影响江苏盐城近岸海域春季浮游植物群落分布的主要环境因子依次为温度、盐度及溶解无机氮。
Based on the survey data of phytoplankton and water environmental parameters collected from the coastal waters of Yancheng,Jiangsu Province in April 2022,the community structure characteristics of phytoplankton and its influencing factors were investigated within the research area.The findings indicated that in total 53 phytoplankton species belonging to 28 genera and 4 phyla were identified in the coastal waters of Yancheng,including 42 species of Bacillariophyta,7 species of Dinophyta,3 species of Cyanophyta,and 1 species of Chrysophyta.The average phytoplankton density was(8286±3465)cells/m^(3),and the diversity index,richness index,and evenness index were 2.88±0.35,2.00±0.39 and 0.95±0.02,respectively.The main dominant species were Nitzschia longissima,Coscinodiscus jonesianus,and Thalassiosira rotula.Cluster analysis indicated that the phytoplankton community could be divided into two groups,with a distinct geographical boundary in their distributions.Correlation analysis between community parameters and environmental factors suggested that phytoplankton density was significantly negatively correlated with salinity(P<0.05,r=−0.457)and significantly positively correlated with dissolved inorganic nitrogen(P<0.05,r=0.449).Additionally,species number,richness index,and diversity index exhibited significant negative correlations with water temperature(P<0.05,r=−0.494,−0.460,and−0.441,respectively).These results suggest that the distribution pattern of phytoplankton community in the coastal waters of Yancheng during spring is mainly influenced by water temperature,salinity and nutrient levels.
作者
秦皓
徐加涛
李莹
周泽龙
杨斌
QIN Hao;XU Jiatao;LI Ying;ZHOU Zelong;YANG Bin(Jiangsu Zhong Xin You Well Testing Tecchnology Co.,Ltd,Nanjing 211106,China;Jiangsu Key Laboratory of Marine Biotechnology,Jiangsu Ocean University,Lianyungang 222005,China;Guangxi Key Laboratory of Marine Environmental Disaster Processes and Ecological Protection Technology,Beibu Gulf University,Qinzhou 535011,China)
出处
《江苏海洋大学学报(自然科学版)》
2026年第1期13-21,共9页
Journal of Jiangsu Ocean University:Natural Science Edition
基金
江苏省海洋科技创新项目(JSZRHYKJ202304)
国家自然科学基金资助项目(42166002)
江苏省自然科学基金资助项目(BK20241962)。
关键词
浮游植物
群落组成
影响因素
盐城近岸海域
phytoplankton
community composition
influencing factors
Yancheng coastal waters
