首页|太湖流域城市河道浮游植物群落结构特征及其与环境因子的关系

太湖流域城市河道浮游植物群落结构特征及其与环境因子的关系

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该文以无锡市滨湖区河道为例,于2023年夏季对滨湖区10条主要河道的浮游植物群落结构及其主要水环境指标进行调研,同时运用冗余分析方法(RDA)揭示浮游植物与环境因子的相互关系.分析结果表明:10条主要河道共检测到浮游植物66种,其中绿藻门(Bacillariophyta)27种、硅藻门(Chlorophyta)19种、蓝藻门(Cyanophyta)9种、隐藻门(Cryptophyta)4种、裸藻门(Euglenophyta)4种、甲藻门(Dinoflagellate)3种;浮游植物优势种(优势度指数大于0.02)共7种,其中细鞘丝藻(Leptolyngbya sp.)优势度最高,达0.19,微囊藻(Microcystis sp.)优势度次之,达0.12;浮游植物丰度为1.76×106~3.19×108 cells·L-1,平均值为4.29×107 cells·L-1;浮游植物多样性指数为1.618~2.877,平均值为2.384,均匀度指数为0.256~0.516,平均值为0.406.根据浮游植物丰度水平、优势度以及群落多样性指数等生物学指标进行综合评价,滨湖区10条主要河道水体的富营养化程度较严重.RDA分析结果表明:总悬浮物、高锰酸盐指数是影响在滨湖区主要河道水体中浮游植物群落结构差异的主要环境因子.
The Phytoplankton Community Structure and Its Relationship with Environmental Factors in Urban Streamways of Taihu Lake Basin
Community structure of phytoplankton and the associated environmental factors are investigated in 10 Urban streamways(Binhu District of Wuxi City)of Taihu Lake Basin in the summer of 2023,and the relationship between phytoplankton and environmental factors is analyzed by redundancy analysis(RDA).Results show that 66 species of phytoplankton are identified,including 27 species of Bacillariophyta,19 species of Chlorophyta,9 species of Cyanophyta,4 species of Cryptophyta,4 species of Euglenophyta and 3 species of dinoflagellate.There are 7 dominant species of phytoplankton(dominance index greater than 0.02),among the most dominant species is leptolyngbya sp.with the dominance index of 0.19,followed by Microcystis sp.with the dominance index of 0.12.The abundance of phytoplankton ranges from 1.76×106 to 3.19×108 cells·L-1,with an average value of 4.29× 107 cells·L-1.The phytoplankton bio diversity index ranges from 1.618 to 2.877 with an average value of 2.384,and the evenness index ranges from 0.256 to 0.516 with an average value of 0.406.As a result,the water of 10 streamways in Binhu District of Wuxi City is in a state of severe eutrophication according to the level of phytoplankton abundance,as well as the degree of dominance and the diversity index.RDA analysis shows that TSS and CODMn are the main environmental factors affecting the spatial distribution of phytoplankton community structure in 10 streamways of Binhu District of Wuxi City.

Taihu Lake Basinurban streamwaysphytoplankton community structureenvironmental factorsRDA

丁淑琴、虞伯兵、邵克强

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苏州市常熟环境监测站,江苏常熟 215500

中国科学院南京地理与湖泊研究所,江苏南京 210008

中国科学院大学南京学院,江苏南京 211135

太湖流域 城市河道 浮游植物 群落结构 环境因子 RDA

2024

江西师范大学学报(自然科学版)
江西师范大学

江西师范大学学报(自然科学版)

CSTPCD北大核心
影响因子:0.538
ISSN:1000-5862
年,卷(期):2024.48(4)