溪源水库蓄水前后冬春季水体营养盐和浮游植物特征研究

发布时间：2018-01-18 05:19

本文关键词：溪源水库蓄水前后冬春季水体营养盐和浮游植物特征研究　出处：《中国环境监测》2016年06期 　论文类型：期刊论文

【摘要】：于2007—2008年溪源水库蓄水前,2014—2015年溪源水库蓄水后对溪源宫水源地水体进行采样,分析了冬春季水体的理化指标、浮游植物生物量及群落组成。蓄水前共鉴定出浮游植物6门26属43种,水体水质状况较好,浮游植物细胞密度平均为7.31×10~5cells/L,以硅藻、绿藻门为优势门类,两者占浮游植物总生物量的比例约为54.7%、32.2%,水体呈贫-中营养状态。蓄水后,水体氮、磷营养盐浓度分别约为蓄水前的2.4倍、3倍,浮游植物细胞密度平均为1.42×10~7cells/L,约为蓄水前的20倍,且群落结构发生改变,优势门类为硅藻、蓝藻、绿藻,所占比例分别为40.2%、38.7%、14.4%,蓝藻门比例有显著提高,约为蓄水前的5倍。说明建库蓄水对浮游植物的影响显著。
[Abstract]:After the water storage of Xiyuan Reservoir from 2007-2008 to 2014-2015, the water body of Xiyuanggong water source area was sampled, and the physical and chemical indexes of water body in winter and spring were analyzed. Phytoplankton biomass and community composition. A total of 43 species of phytoplankton belonging to 26 genera and 6 phyla were identified before storage. The water quality was good, and the average cell density of phytoplankton was 7.31 脳 10 ~ (5) cells / L. Diatoms and Chlorophyta were the dominant species. The proportion of them to the total biomass of phytoplankton was about 54.7 and 32.2.The water was in a poor and medium nutritional state. After storing water, the water was nitrogen. The concentration of phosphorus nutrient was about 2.4 times of that before water storage, and the average cell density of phytoplankton was 1.42 脳 10 ~ (7) cells / L, about 20 times of that before water storage, and the community structure was changed. The dominant phylum is diatom, cyanobacteria and green algae, the proportion of them is 40.22.2% and 38.7%, respectively. The proportion of cyanobacteria increases significantly. It is about 5 times of that before water storage, which indicates that the effect of water storage on phytoplankton is significant.
【作者单位】：福建师范大学环境科学与工程学院;福建省污染控制与资源循环重点实验室(福建师范大学);福州青源供水有限公司;
【基金】：国家自然科学基金(41573075) 福建省环保厅项目(2015R017) 2015年福建省科学技术协会科技思想库研究项目(FJKX-A1503) 福建师范大学2016年国家级大学生创新创业训练计划(201610394009)
【分类号】：X524;Q948.8
【正文快照】： 饮用水是城市重要的水资源,直接影响着人们的健康,保护饮用水源对城市发展起着重要的保障作用[1]。近年来,经济的快速发展导致了污染物排放量的急剧增加[2],一些水源地受到了不同程度的污染,开始出现富营养化现象[3-6]。水体富营养化的一项显著特征是浮游植物的异常增殖,且浮

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