千峡湖浮游植物群落特征及与主要环境因子的关系  

Relationship between phytoplankton community structure and environmental factors in Qianxia Lake

作　　者：赵本宣 金向鹏 郑智恩 赵晟 ZHAO Ben-xuan;JIN Xiang-peng;ZHENG Zhi-en;ZHAO Sheng(Zhejiang Zhonglan Environmental Technology Co.,Ltd.,Wenzhou 325000,China;School of Marine Science and Technology,Zhejiang Ocean University,Zhoushan 316000,China)

机构地区：[1]浙江中蓝环境科技有限公司,浙江温州325000 [2]浙江海洋大学海洋科学与技术学院,浙江舟山316000

出　　处：《环境生态学》2024年第4期50-56,共7页Environmental Ecology

摘　　要：为探究千峡湖浮游植物群落结构的时空分布格局,于2019年8月至2020年7月在青田县千峡湖18个采样点分4个季度开展浮游植物生态调查,测定浮游植群落组成及水体理化指标,以探究千峡湖浮游植物群落结构特征与环境因子的关系。结果表明,共鉴定出浮游植物7门176种。不同门类的种类数差异较大,绿藻门种类最多,共记录70种,其次为硅藻门,记录68种。浮游植物的平均密度为0.588×10^(6)cells/L,绿藻门的占比最大,其次为硅藻门。不同位点浮游植物平均密度存在差异,分季度平均密度分布为夏季>秋季>冬季>春季。冗余分析表明,千峡湖水体中浮游植物种群分布及群落结构特征与所在水体环境因子之间存在密切联系,并且对不同门类的浮游植物生长与繁殖产生显著影响的环境因子也不完全相同。硅藻、甲藻和金藻分布与pH值、氨氮和总磷呈现正相关,与水温、五日生化需氧量及氟化物呈现负相关;蓝藻和绿藻分布与水温、五日生化需氧量及氟化物呈现正相关,与pH值、氨氮和总氮呈现负相关。Pearson相关性分析表明,pH值、水温、五日生化需氧量及氟化物等环境因子是影响千峡湖浮游植物群落结构最主要的环境因子。In this study,we explored the spatial and temporal distribution pattern of phytoplankton community structure in Qianxia Lake,an ecological survey was carried out at 18 sampling points in Qianxia Lake,Qingtian County,from August 2019 to July 2020,and the composition of phytoplankton community and physical and chemical parameters of water were measured in 4 seasons to explore the relationship between phytoplankton community structure characteristics and environmental factors in Qianxia Lake.The results showed that 176 species of phytoplankton were identified from 7 phyla.The number of species varied greatly among different phyla.Chlorophyta had the most species with 70 species recorded,followed by diatoma with 68 species recorded.The average density of phytoplankton was 0.588×10^(6)cells/L,and the contribution rate of chlorophyta was the highest,followed by diatom.The average density of phytoplankton at different loci was different,and the average density distribution was summer>autumn>winter>spring.Redundancy analysis showed that the distribution and community structure of phytoplankton in Qianxia Lake were closely related to the environmental factors in the water,and the environmental factors that had significant effects on the growth and reproduction of phytoplankton in different categories were not exactly the same.The distribution of diatom,dinoflagellate and chrysochlorella was positively correlated with pH,ammonia nitrogen and total phosphorus,and negatively correlated with water temperature,5-day biochemical oxygen demand and fluoride.The distribution of cyanobacteria and green algae was positively correlated with water temperature,5-day biochemical oxygen demand and fluoride,and negatively correlated with pH,ammonia nitrogen and total nitrogen.Pearson correlation analysis showed that pH value,water temperature,5-day biochemical oxygen demand and fluoride were the most important environmental factors affecting phytoplankton community structure in Qianxia Lake.

关 键 词：千峡湖 浮游植物 群落结构 环境因子 

分 类 号：X524[环境科学与工程—环境工程]