Effects of oxytetracycline on denitrification and anammox processes in riparian buffer zone soil

文献类型： 外文期刊

第一作者： Xue, Dongmei

作者： Xue, Dongmei;Yu, Hang;Li, Jing;Yu, Hang;Li, Jing;Jin, Ke;Wang, Zhongliang

作者机构：

关键词： riparian zone; oxytetracycline; denitrification; anammox; co-occurrence network; 15 N tracer

期刊名称：INTERNATIONAL JOURNAL OF AGRICULTURAL AND BIOLOGICAL ENGINEERING （ 影响因子：2.2； 五年影响因子：2.4 ）

ISSN： 1934-6344

年卷期： 2024 年 17 卷 6 期

页码：

收录情况： SCI

摘要： Microbial denitrification and anaerobic ammonium oxidation (anammox) are two critical processes involved in nitrate ( ) removal from riparian buffer zones. However, the responses of these processes to antibiotics used in nearby NO - 3 animal farms are not yet fully understood. In this study the effects of oxytetracycline (OTC) short-term exposure on microbial denitrification and anammox in riparian buffer zones were examined via slurry-based 15 N tracer technique combined with network analysis. Short-term OTC exposure will significantly decrease denitrification and anammox performance by restricting related functional genes, but inhibitory upper will appear at high OTC contents. The dominant bacterial community did not significantly change, while the bacterial network became more complex to keep the network stable. Functional bacteria containing nosZ and hzsB genes underwent significant changes, manifested as inhibitory effects, promotion effects, and no significant effects. The results indicated that short-term OTC exposure seemed unable to affect all types of functional bacteria, resulting in a considerable part of bacteria maintaining certain nitrogen removal performance. In the bacteria containing nosZ gene, it was found that 22.2% are denitrification mode bacteria and 77.8% are non-denitrification mode bacteria, suggesting that the restoration of the denitrification process should rely on the maintenance of a diverse denitrifying community. These results provide scientific knowledge on the effect of antibiotics-containing wastewater on the excessive N loading in aquatic ecosystems, and also indicate that additional efforts are needed to control antibiotic pollution in riparian buffer zones and coastal ecosystems.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序