Gou Ting, Ma Qian-Li, Wang Zhen-Xing, Wang Li, Yao Ling-Ai, Xu Zhen-Cheng, Zhao Xue-Min, Liang Rong-Chang, Lan Yu
South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China.
Huan Jing Ke Xue. 2017 Oct 8;38(10):4141-4150. doi: 10.13227/j.hjkx.201702098.
Large-scale cyanobacteria bloom occurred in the summer of 2014 in the Guishi Reservoir that is an important drinking water source for Hezhou City. The dynamic change regularity, external pollution sources, and the phytoplankton community characteristics during the bloom were investigated to evaluate the eutrophication in the reservoir and to present effective prevention and control measures. The results showed that nitrogen and phosphorus concentrations increased year by year; water quality on some sites has been out of class Ⅱ of national water quality standards; and the main pollution source was the agricultural non-point sources. Phytoplankton cell density was in the range of 8.60×10-5.36×10 cells·L and chlorophyll concentrations reached 74.48 μg·L during the bloom. The dominant species was whose density reached 5.36×10 cells·L. The cell density decreased over time and concentrated on the surface and at the depth of 2 m underwater. The total phytoplankton cell density was strongly correlated to total phosphorus, total nitrogen, nitrate nitrogen, and the permanganate index, and was inversely correlated to transparency. The water in the Guishi Reservoir was not polluted by microcystic toxins. Moreover, Guishi Reservoir is in a meso-eutrophic state; therefore, the prevention and control of the cyanobacteria bloom should focus on weather conditions and on reducing the input of nitrogen and phosphorus to keep the nutrient levels low.
2014年夏季，作为贺州市重要饮用水源的龟石水库发生了大规模蓝藻水华。为评估该水库的富营养化状况并提出有效的防治措施，对水华期间的动态变化规律、外源污染源及浮游植物群落特征进行了调查。结果表明，氮、磷浓度逐年升高；部分点位水质已超出国家Ⅱ类水质标准；主要污染源为农业面源。水华期间浮游植物细胞密度在8.60×10 - 5.36×10个细胞·L之间，叶绿素浓度达到74.48μg·L。优势种为 ，其密度达到5.36×10个细胞·L。细胞密度随时间下降，集中在水体表面及水下2米深处。浮游植物总细胞密度与总磷、总氮、硝态氮和高锰酸盐指数呈显著正相关，与透明度呈负相关。龟石水库水体未受微囊藻毒素污染。此外，龟石水库处于中富营养状态；因此，蓝藻水华的防治应重点关注天气条件，并减少氮、磷输入以保持较低的营养水平。
需注意，原文中“ whose density reached 5.36×10 cells·L.”处“ whose”指代不明，可能会影响准确理解。 以及“2014年夏季，作为贺州市重要饮用水源的龟石水库发生了大规模蓝藻水华。为评估该水库的富营养化状况并提出有效的防治措施，对水华期间的动态变化规律、外源污染源及浮游植物群落特征进行了调查。结果表明，氮、磷浓度逐年升高；部分点位水质已超出国家Ⅱ类水质标准；主要污染源为农业面源。水华期间浮游植物细胞密度在8.60×10 - 5.36×10个细胞·L之间，叶绿素浓度达到74.48μg·L。优势种为 ，其密度达到5.36×10个细胞·L。细胞密度随时间下降，集中在水体表面及水下2米深处。浮游植物总细胞密度与总磷、总氮、硝态氮和高锰酸盐指数呈显著正相关，与透明度呈负相关。龟石水库水体未受微囊藻毒素污染。此外，龟石水库处于中富营养状态；因此，蓝藻水华的防治应重点关注天气条件，并减少氮、磷输入以保持较低的营养水平。”这段话中出现一些未明确的指代（如“ ”），翻译时只能尽量保留原文内容并按格式呈现。
