摘要
潟湖生态系统在水产养殖、旅游休闲等生态服务功能中发挥着重要作用。于2016-2018年10-12月对杭州湾北部人工潟湖的浮游植物群落以及营养盐水平进行监测,探究人工潟湖内浮游植物群落结构的变化趋势和主导这些变化的主要营养盐种类。结果表明:潟湖内浮游植物组成主要为硅藻、绿藻和蓝藻门,优势属众多,其中硅藻门的梅尼小环藻(Cyclotella meneghiniana)和变异直链藻(Melosira varians)是最常见的优势种;在调查期间Shannon指数、Margalef指数和多样性阈值等多样性指数逐年递增,水体为中度富营养化状态,水域生物多样性增加,水质维持在一二类水,水环境改善且生态风险较低;冗余分析表明,该水域秋冬交替期对浮游植物群落结构造成影响的主要环境因子为硅酸盐、水温、无机磷、氮磷比和盐度,控制该水域中无机磷的输入是防范有害藻华暴发的重要策略。
Lagoon ecosystem provides important ecological services,including aquaculture,tourism,and leisure.From October to December in 2016-2018,we monitored phytoplankton communities and nutrient levels in an artificial lagoon in northern Hangzhou Bay,to explore the dynamics of phytoplankton community structure in the lagoon and the main kinds of nutrients driving such changes.The results showed that phytoplankton in the lagoon was mainly composed of Bacillariophyta,Chlorophyta,and Cyanophyta.There were many dominant genera.Cyclotella meneghiniana and Melosira varians of Bacillariophyta were the most dominant species.Diversity indices such as Shannon index,Margalef index and diversity threshold increased year by year.Water body was at a state of moderate eutrophication,with biodiversity being increased.Water quality remained in Class I and Class II,water environment was improved,and the ecological risk was low.The results of redundancy analysis showed that silicate,water temperature,inorganic phosphorus,ratio of nitrogen to phosphorus,and salinity were the main factors affecting phytoplankton community structure during the autumn-winter interchange.Controlling inorganic phosphorus input is an important strategy to prevent harmful algal blooms.
作者
刘炜
杨娜
张晟曼
郜晓峰
邢浩
钟逸云
刘金林
何培民
孙彬
LIU Wei;YANG Na;ZHANG Sheng-man;GAO Xiao-feng;XING Hao;ZHONG Yi-yun;LIU Jin-lin;HE Pei-min;SUN Bin(College of Marine Ecology and Environment,Shanghai Ocean University,Shanghai 201306,China)
出处
《生态学杂志》
CAS
CSCD
北大核心
2020年第10期3342-3349,共8页
Chinese Journal of Ecology
基金
上海市海洋局科研项目(沪海科2015-02)
上海海洋大学骆肇荛基金项目(A1200400201328)资助。
关键词
杭州湾
浮游植物
冗余分析
水质状况
Hangzhou Bay
phytoplankton
redundancy analysis
water quality
