| 引用本文: | 李兴月,张生,刘禹,卢宗福,史小红,杨朝霞,王殿飞,赵耘溪.呼伦湖浮游植物演变特征及影响因素.湖泊科学,2025,37(1):50-60. DOI:10.18307/2025.0112 |
| Li Xingyue,Zhang Sheng,Liu Yu,Lu Zongfu,Shi Xiaohong,Yang Zhaoxia,Wang Dianfei,Zhao Yunxi.Dynamics and drivers of phytoplankton in Lake Hulun. J. Lake Sci.2025,37(1):50-60. DOI:10.18307/2025.0112 |
|
| 摘要: |
| 湖泊中浮游植物过度生长繁殖引起的水华现象日益频繁，严重威胁湖泊生态环境的健康与安全。近年来呼伦湖蓝藻水华覆盖面积有扩大的趋势，2022年呼伦湖蓝藻水华最严重时几乎覆盖了整个湖面，本文分别在春、夏和秋季调查了湖泊表、中、底层水体的浮游植物种类、细胞密度、生物量和相关水质指标，共鉴定出浮游植物193种，隶属于8门113属，优势种共14种，物种组成表现为绿藻—硅藻—蓝藻型，其中春、秋季浮游植物种类数基本相当，夏季最少，但夏季的细胞密度最高，春、夏、秋季的浮游植物生物量分别为686、510和166 mg/L。春季浮游植物Shannon-Wiener多样性指数最高，夏季Margalef丰富度指数最高，春季Pielou均匀度指数最高，呼伦湖浮游植物群落特征及其季节性差异是湖泊水环境条件和气象因素共同作用的结果，相关性分析结果表明，主要影响因素依次为水温、总氮、总磷、pH、溶解氧、气温、蒸发量和风速等。 |
| 关键词: 呼伦湖 浮游植物 群落特征 水华 影响因素 |
| DOI：10.18307/2025.0112 |
| 分类号: |
| 基金项目:内蒙古重点研发和成果转化计划项目(2023YFDZ0022)；国家自然科学基金项目(52369014，52060022)联合资助 |
|
| Dynamics and drivers of phytoplankton in Lake Hulun |
|
Li Xingyue1，Zhang Sheng1，2，Liu Yu1，2，Lu Zongfu1，Shi Xiaohong1，2，Yang Zhaoxia1，2，Wang Dianfei3，Zhao Yunxi1
|
|
1.Water Conservancy and Civil Engineering College, Inner Mongolia Agricultural University, Hohhot 010018 , P.R.China ；2.Water Resources Protection and Utilization Key Laboratory, Inner Mongolia Agricultural University, Hohhot 010018 , P.R.China ；3.Inner Mongolia Ningcheng County Discipline Inspection and Supervision Work Guarantee Center, Chifeng 024200 , P.R.China
|
| Abstract: |
| Algal blooms caused by excessive growth and reproduction of phytoplankton are becoming frequently in lakes, threatening their health and safety of ecological systems. In recent years, the coverage area of cyanobacterial blooms in Lake Hulun has been expanding. In 2022, the most severe cyanobacterial blooms almost covered the surface of Lake Hulun. A sampling program was conducted in the spring, summer and autumn of 2022, concerning the variables of phytoplankton species, cell density, biomass and several water quality indicators in the surface, middle and bottom water of the lake. A total of 193 species of phytoplankton were identified belonging to 113 genera and 8 phyla, with 14 dominant species. The species composition was of the green algae-diatom-cyanobacteria type. The number of phytoplankton species in spring and autumn was basically the same, that was twice of the minimum level in summer. The cell density in summer was the highest, which was one order of magnitude higher than that in spring and autumn. The phytoplankton biomass in spring, summer and autumn was 686, 510 and 166 mg/L, respectively. The Shannon-Wiener diversity index was the highest in spring. The Margalef richness index was the highest in summer. The Pielou evenness index was the highest in spring. The characteristics and seasonal differences of phytoplankton community were mainly caused by lake water environment conditions and meteorological factors. The correlation analysis revealed that the main influencing factors were water temperature, total nitrogen, total phosphorus, pH, dissolved oxygen, air temperature, evaporation and wind speed. |
| Key words: Lake Hulun phytoplankton community characteristics algal bloom influencing factors |
