Short-term effects of sulfate on ammonia-oxidizing microorganisms in freshwater aquaculture pond sediments

文献类型： 外文期刊

第一作者： Dai, Lili

作者： Dai, Lili;Peng, Liang;Tao, Ling;Zhang, Hui;Li, Gu;Yu, Liqin;Hao, Liuliu

作者机构：

关键词： AOB; AOA; Anammox; Sulfate; Aquaculture pond

期刊名称：JOURNAL OF SOILS AND SEDIMENTS （ 影响因子：3.0； 五年影响因子：3.4 ）

ISSN： 1439-0108

年卷期： 2025 年 25 卷 5 期

页码：

收录情况： SCI

摘要： Purpose Ammonia and sulfur compounds in sediments constitute two major threats to freshwater aquaculture pond and surrounding environments. This study aims to explore the effects of sulfate elevation on ammonia oxidization in aquaculture pond sediment. Methods In this study, mesocosm systems were established using sediment and water collected from a freshwater aquaculture pond, and treated with Na2SO4 of final concentrations of about 0 (control), 30 (T1 group), 150 (T2 group), and 500 mg L-1 (T3 group). The effects of SO42- as well as its reduced sulfides on ammonia-oxidizing microorganisms, including bacteria (AOB) and archaea (AOA), and anaerobic ammonium oxidation (anammox) bacteria in surface sediments were analyzed. Results The potential nitrification rates and anammox rates were decreased, but the copy numbers of AOA, AOB, and anammox bacteria in the T2 and T3 groups were slightly increased compared to the control group. Clear differences of AOA and AOB compositions were found between the T2/T3 group and control group, while the differences of anammox bacterial communities between these groups were relatively small. The co-occurrence correlations among different ammonia-oxidizing microbial taxa were greatly reduced by treatment of high concentrations of sulfate. Compared with AOA and AOB, anammox bacterial communities were less influenced by sediment environmental change induced by sulfate addition, and were positively correlated with nitrite and ammonia concentrations. Conclusion Our results demonstrated that anammox bacteria could be more resilient than AOA and AOB communities, and thus would be important in ammonia transformation in sulfur-rich freshwater aquaculture pond sediments.

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