三峡水库浮游植物群落结构特征及其水环境评价
Characteristics of Phytoplankton Community Structure and Water Environment Assessment in the Three Gorges Reservoir
田楚铭 1齐青松 2张弛 2刘妍 3何婷 2夏春香 2张羽珩 2米武娟 2毕永红2
作者信息
- 1. 哈尔滨师范大学生命科学与技术学院,黑龙江哈尔滨 150025;中国科学院水生生物研究所淡水生态与生物技术国家重点实验室,湖北武汉 430072
- 2. 中国科学院水生生物研究所淡水生态与生物技术国家重点实验室,湖北武汉 430072
- 3. 哈尔滨师范大学生命科学与技术学院,黑龙江哈尔滨 150025
- 折叠
摘要
为探究三峡水库浮游植物群落结构特征及水环境质量状况,于2021-2022年在三峡水库干支流设置56个采样点进行了季度调查.共鉴定出浮游植物78种,隶属于8门66属,群落类型为绿藻-硅藻-蓝藻型,2021年优势种12种,2022年优势种6种.浮游植物细胞密度具有时空异质性,2021年由大到小次序为:秋季、春季、夏季、冬季;2022年由大到小次序为:夏季、春季、秋季、冬季,空间变化上均表现为支流大于干流的变化趋势.Pearson相关性分析表明,浮游植物生物量与WT、TN、SPC呈极显著正相关性(P＜0.001),与NH4+-N、NO3--N、DO呈极显著正相关性(P＜0.01),与CODMn、pH呈显著正相关性(P＜0.05).变差分解分析(VPA)表明,2021年营养盐对浮游植物群落结构影响较大,而2022年则是水体理化性质影响较大.单项理化参数评价、综合营养状态指数评价以及浮游植物a多样性指数评价结果显示,2021-2022年三峡水库水体呈中-轻富营养状态,水体为中污染型水体.
Abstract
In order to investigate the characteristics of phytoplankton community structure and water environment quality in the Three Gorges Reservoir,a quarterly survey was conducted at 56 sampling sites in the main tributaries of the reservoir from 2021 to 2022.A total of 78 species of phytoplankton belonging to 66 genera in 8 phyla were identified.The community exhibited a Chlorophyta-Bacillariophyta-Cyanophyta composition with 12 dominant species in 2021 and 6 in 2022.Phytoplankton cell density showed spatial and temporal heterogeneity:in 2021,the order of cell density from the highest to the lowest was autumn,spring,summer,and winter;in 2022,the order was summer,spring,autumn,and winter;and the spatial variation showed a trend by descending from tributary to main stream.Pearson correlation analysis indicated that phytoplankton biomass was positively correlated with WT,TN and SPC(P＜0.001),NH4+-N,NO3-N and DO(P＜0.01),and CODMn and pH(P＜0.05).The Variance Partitioning Analysis(VPA)demonstrated that the phytoplankton community structure was significantly affected by nutrient salts in 2021,while the physicochemical properties were significantly affected in 2022.The results of individual physical and chemical parameter evaluation,comprehensive nutrient status index evaluation and phytoplankton a diversity index evaluation showed that the water body of the Three Gorges Reservoir was in a medium to light eutrophic state and was a moderately polluted water body during 2021-2022.
关键词
三峡水库/浮游植物/群落结构/环境因子/水环境评价Key words
the Three Gorges Reservoir/phytoplankton/community structure/environmental factors/water environmental assessment引用本文复制引用
基金项目
国家自然科学基金资助项目(U2040210)
出版年
2024
NETL
NSTL
万方数据