| 摘要: |
| 为了解供水水库的蓝藻种群和微囊藻毒素的季节变化，于2012年1—12月对韶关的苍村、瀑布和花山3座供水水库进行了采样分析。结果表明，3座水库为中营养型水库，监测蓝藻共9属（种），优势种为鱼腥藻和微囊藻，蓝藻最高丰度为5.67×107L-1；降水导致营养盐物质带入水库和水体不稳定性是蓝藻种群和优势种在夏秋两季季节变化和占优势的主要影响因子。3座水库ρ(微囊藻毒素)为0.1～0.9 μg/L，最高值接近世界卫生组织对饮用水中MC-LR的指导性限制值（1μg/L）标准。微囊藻与微囊藻毒素呈显著正相关性 (R=0.871，P<0.01)，表明产微囊藻毒素的蓝藻主要为微囊藻，当水库发生微囊藻水华时有发生微囊藻毒素的风险。 |
| 关键词: 富营养化 蓝藻种群 微囊藻毒素 水库 季节变化 韶关 |
| DOI： |
| 分类号:X835 |
| 文献标识码:B |
| 基金项目:韶关市社会发展科技专项基金资助项目（2014CX/K353） |
|
| Seasonal Variation of Cyanobacterial Population and Microcystin in Three Reservoirs for Drinking Water Supply in Shaoguan City |
|
HUANG Cheng, QIU Jieting
|
|
Shaoguan Enviromental Monitoring Center, Shaoguan,Guangdong 512026, China
|
| Abstract: |
| In order to understand seasonal variation of cyanobacterial population and microcystin in reservoirs, we analyzed three drinking water supplying reservoirs in Shaoguan from January to December in 2012, they are: Cangcu reservoir, Pubu reservoir and Huashan reservoir. The results showed the three reservoirs were mesotrophic reservoirs. 9 species of cyanobacteria were observed.Anabaena azotic and Microcystis flos aquae were the predominant species. The highest abundance of cyanobacteria ranged was up to 5.67×107L-1. Increasing of nutrient and water instability caused by rainfall were important factors lead to seasonal variation and predomination of cyanobacterial population and microcystin in Summer and Autumn. The microcystin ranged from 0.1 to 0.9 μg/L in three reservoirs, the highest concentration was close to the WHO's MC LR standard in drinking water (1μg/L). The significant positive correlation between Microcystis flos aquae and microcystin (R=0.871,P<0.01) showed that Microcystis flos aquae was mainly toxic algae, and there is risk of microcystin when the bloom of microcystis occurs in the reservoir. |
| Key words: Eutrophication Cyanobacterial population Microcystin Reservoir Seasonal variation Shaoguan |
