珠江八大口门冬季浮游植物优势种生态位及其种间联结性  

Niche and Interspecific Association of Dominant Phytoplankton Species during Winter in Eight Estuaries of Pearl River

作　　者：何瑞 李青峰 彭松耀 HE Rui;LI Qingfeng;PENG Songyao(Key Laboratory of Water Security Guarantee in Guangdong-Hong Kong-Marco Greater Bay Area of Ministry of Water Resources Guangzhou 510611,China;Pearl River Water Resources Research Institute,Pearl River Water Resources Commission of the Ministry of Water Resources,Guangzhou 510611,China)

机构地区：[1]粤港澳大湾区水安全保障重点实验室,广东广州510611 [2]珠江水利委员会珠江水利科学研究院,广东广州510611

出　　处：《人民珠江》2024年第5期46-54,共9页Pearl River

基　　金：国家科技基础资源调查专项(2019FY101900)。

摘　　要：为了解珠江口门区冬季浮游植物优势种生态位及其种间联结性,选取珠江河口八大口门为研究地点,于2019年12月对珠江口八大口门区浮游植物以及环境因子进行了检测,结合生态位宽度、生态位重叠值、生态响应速率、总体联结性、χ^(2)检验以及CCA等方法,分析优势种生态位、种间联结性及其与环境因子关系。结果表明:①共鉴定到浮游植物54种,隶属6门30属,其中有7个优势种;②优势种生态位宽度及种对间生态位重叠值差异较大,颗粒直链藻(Aulacoseira granulata)对水环境适应能力较强,具有广泛的生态适应幅度,中肋骨条藻(Skeletonema costatum)生态位重叠值低,种间竞争比较弱;③珠江口门区浮游植物群落总体处于演替的初期阶段且存在正向演替的趋势,物种间联结性不强,种间关系较为松散,浮游植物优势种之间以及它们和环境之间的动态平衡尚未达到,目前正处于优势种的发展阶段;④氨氮、总有机碳和浊度是影响珠江八大口门浮游植物优势种分布和生态位的主要环境因子。To understand the niche and interspecific association of the dominant phytoplankton species during winter in the Pearl River estuaries,this paper selects eight Pearl River estuaries as the study area.Phytoplankton and environmental factors were detected in eight Pearl River estuaries in December 2019.The dominance value,niche width,niche overlap,variance ratio method,chi-squared test(χ^(2)),and CCA are utilized to analyze the niche and interspecific association with respect to the dominant phytoplankton species.The results are as follows.①54 species belonging to 6 phyla are identified,of which 7 species from 30 genera are the dominant species.②The niche width of the dominant species and the niche overlap values vary greatly among species pairs.Aulacoseira granulata has strong adaptability to the aquatic environment and exhibits a wide range of ecological adaptability.The niche overlap value of Skeletonema costatum is low,and interspecific competition is weak.③The phytoplankton of the Pearl River Estuary is generally in an early stage of succession and there is a trend of positive succession.The linkage community in the Pearl between species is not strong and the interspecific relationship is loose.The dominant phytoplankton species have not yet reached a relative dynamic equilibrium among themselves and between the dominant species and the environment,and the dominant species are in the stage of development.④Ammonia nitrogen,total organic carbon(TOC),and turbidity are the main environmental factors affecting the distribution and ecological position of the dominant phytoplankton species in the eight Pearl River estuaries.

关 键 词：浮游植物 优势种 生态位 种间联结 环境因子 珠江口 

分 类 号：TV1[水利工程]