Appraisal Center for Environment and Engineering, Ministry of Ecology and Environment, Beijing 100012, China.
Chinese Research Academy of Environmental Sciences, Beijing, 100012, China E-mail:
Water Sci Technol. 2021 Mar;83(5):1130-1140. doi: 10.2166/wst.2021.009.
Algal bloom (AB) is a serious water environment problem in China, but it is still unclear how AB affects microorganisms with special functions (such as nitrogen-, phosphorus-, sulfur- and iron-related bacteria) at different AB stages. Samples of water and sediment were taken in the AB region and free algal bloom (FAB) region of Chaohu Lake at different AB stages, and the numbers of N-, P-, S- and Fe-related bacteria were determined by culture-dependent methods. Results showed that during the whole experiment, numbers of N-, P-, S-, and Fe-related bacteria in the AB region were significantly higher than those in the FAB region, especially at the AB outbreak stage. In the FAB region, numbers of above bacteria showed little variation with time. In the AB region, however, numbers of N-, S-, and Fe-related bacteria evidently changed as 'Λ'-type with AB process. They presented an upward trend at the AB formation stage and the initial stage of AB outbreak, and then showed a downward trend. Numbers of P-related bacteria also showed a similar trend as the above bacteria, but they kept high level for long time at the AB outbreak stage. This study indicated that AB produced different effects on microorganisms with special functions at different AB stages.
藻华（AB）是中国严重的水环境问题，但AB 如何在不同 AB 阶段影响具有特殊功能的微生物（如氮、磷、硫和铁相关细菌）仍不清楚。在 AB 阶段和巢湖富营养化藻华区（FAB）的不同 AB 阶段采集水样和底泥样品，采用培养依赖的方法测定 N、P、S 和 Fe 相关细菌的数量。结果表明，在整个实验过程中，AB 区的 N、P、S 和 Fe 相关细菌数量明显高于 FAB 区，尤其是在 AB 爆发阶段。在 FAB 区，上述细菌的数量随时间变化很小。然而，在 AB 区，N、S 和 Fe 相关细菌的数量随着 AB 过程呈“Λ”型明显变化。它们在 AB 形成阶段和 AB 爆发的初始阶段呈上升趋势，然后呈下降趋势。P 相关细菌的数量也呈现出与上述细菌相似的趋势，但在 AB 爆发阶段长时间保持高水平。本研究表明，AB 在不同 AB 阶段对具有特殊功能的微生物产生不同的影响。
