秋冬季浮游植物群落结构特征及其环境因子关系——以珠江口南沙海域为例  

Community Structures of Phytoplankton and Its Relationship to Environmental Factors—Taking the Nansha Sea Area of Pearl River Estuary as an Example

作　　者：高广银 李学恒 唐灵刚 李颖颖 Gao Guangyin;Li Xueheng;Tang Linggang;Li Yingying(Guangzhou Geological Survey Institute,Guangzhou 510000,Guangdong,China)

机构地区：[1]广州市地质调查院,广东广州510000

出　　处：《绿色科技》2024年第20期74-78,84,共6页Journal of Green Science and Technology

基　　金：广州市海洋资源(无居民海岛)调查项目(编号:4112000000045)。

摘　　要：为探究珠江口南沙海域浮游植物群落结构特征及其与环境因子的关系,分别于2021年10月(秋季)、2022年2月(冬季)对珠江口南沙海域的浮游植物及海水温度、盐度、营养盐浓度等环境因子进行了调查。结果表明:本次调查共鉴别出浮游植物160种,其中包括硅藻38属96种,甲藻7属19种,裸藻13属16种,绿藻11属13种,蓝藻9属13种,隐藻2种,金藻1种。硅藻为主要类群,占总种数的60%。优势种(Y≥0.02)有8种,硅藻占6种,如颗粒直链藻、美丽星杆藻等。浮游植物细胞丰度季节变化明显,秋季细胞丰度平均为731.39×104 cells/m 3,冬季为75.52×104 cells/m 3。Shannon-Wiener多样性指数(H′)、物种均匀度Pielou′s指数(J′)平均值分别为2.70和0.57。浮游植物细胞丰度与环境因子相关性关系在不同季节差异显著,秋季活性磷酸盐与浮游植物细胞丰度呈极显著正相关关系。In order to explore the relationship between phytoplankton community structures and environmental factors in the Nansha sea area of Pearl River Estuary,phytoplankton and other environmental factors such as sea temperature,salinity and nutrient concentration in the Nansha sea area of the Pearl River Estuary were investigated in October 2021(autumn)and February 2022(winter),respectively.The results show that 160 species of phytoplankton are identified,including 96 species belonging to 38 genera of Bacillariophyceae,followed by Pyrrophyta(7 genera and 19 species),Euglenophyta(13 genera and 16 species),Chlorophyta(11 genera and 13 species),Cyanobacteria(9 genera and 13 species),Cryptophyta(2 species)and Chrysophyta(1 species).The Bacillariophyceae is the main group,accounting for 60%of the total species.There are 8 dominant species(Y≥0.02),of which 6 are Bacillariophyceae,such as Melosira granulata and Asterionella formosa.The seasonal variation of phytoplankton cell abundance is significant,with an average of 731.39×104 cells/m 3 in autumn and 75.52×104 cells/m 3 in winter.The average Shannon-Wiener diversity index(H')and Pielou's evenness index(J')are 2.70 and 0.57,respectively.Better relationship was found between phytoplankton abundance and active phosphate in autumn.

关 键 词：珠江口南沙海域 浮游植物 群落结构 环境因子 

分 类 号：P313[天文地球—固体地球物理学]