文献类型： 外文期刊

作者： Ma, Yushen ¹ ; Zhu, Xiaoming ³ ; Chen, Hui ⁵ ; Ni, Lixiao ¹ ; Du, Cunhao ¹ ; Xu, Chu ¹ ; Shi, Jiahui ¹ ; Li, Yiping ¹ ; Li, Shiyin ⁴ ;

作者机构： 1.Hohai Univ, Coll Environm, Key Lab Integrated Regulat & Resource Dev Shallow, Minist Educ, 1 Xi Kang Rd, Nanjing 210098, Peoples R China

2.Hohai Univ, Suzhou Res Inst, Suzhou 215100, Peoples R China

3.Shanghai Waterway Engn Design & Consulting Co Ltd, Shanghai 200120, Peoples R China

4.Nanjing Normal Univ, Sch Psychol, Nanjing 210024, Peoples R China

5.BAAFS, BVRC, Beijing 100097, Peoples R China

关键词： Cyanobacteria recovery; Dissolved organic matter; Allelochemicals; Greenhouse gas; Cyanobacteria recovery; Dissolved organic matter; Allelochemicals; Greenhouse gas

期刊名称：WATER RESEARCH （ 影响因子：12.4； 五年影响因子：12.9 ）

ISSN： 0043-1354

年卷期： 2025 年 282 卷

页码：

收录情况： SCI

摘要： Climate change amplifies cyanobacterial blooms, creating a feedback loop between warming and bloom intensity. This dynamic emphasizes the need to address greenhouse gas (GHG) emissions during in-situ cyanobacterial control, minimizing algicides use and its long-term climatic impacts. However, research on the doseresponse of algicides on GHG emissions is limited. This study investigated the dose-dependent effects of artemisinin sustained-release algicides (ASAs) on GHG emissions and microbial dynamics during cyanobacteria recovery prevention. Microcosm experiments revealed that ASAs dosage reshaped the carbonate system, lowering pH and increasing DOC and C/N ratio, promoting short-term CO2 emissions. Microbial diversity decreased with higher ASAs dosage, and Proteobacteria replaced Cyanobacteria as the dominant group. The formate metabolic pathway, which produces CO2, was strengthened, while CH4 oxidation was weakened. The abundance of genera such as Curvibacter, Burkholderiales, and Acetobacterales increased, correlating with enhanced carbon and nitrogen metabolism, while CH4-oxidizing genera like Methylobacterium and Methylorubrum showed reduced abundance, associated with weakened CH4 metabolism. Co-occurrence networks emphasized that the ASAs gradient indirectly affected dominant microbes and carbon-nitrogen metabolism by altering water chemistry. ASAs exacerbated GHG emissions by coupling environmental changes with microbial metabolism. Our findings provide a theoretical basis for using lower ASAs dose during cyanobacteria recovery prevention and underscore the importance of considering biogeochemical cycles and ecosystem impacts in cyanobacterial control.