Responses of Ammonia Oxidizing Microorganisms to Single and Combined Sulfamethazine and Cadmium Exposure in Soil

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Titel: Responses of Ammonia Oxidizing Microorganisms to Single and Combined Sulfamethazine and Cadmium Exposure in Soil

Beteiligte: Zhou, Changrui [Verfasser:in]; Gao, Yun [Verfasser:in]; Ma, Qiang [Verfasser:in]; Xia, Zhuqing [Verfasser:in]; Zhu, Mengmeng [Verfasser:in]; Zhang, Xinhui [Verfasser:in]; An, Siyu [Verfasser:in]; Li, Shuailin [Verfasser:in]; Yu, Wantai [Verfasser:in]

Erschienen: [S.l.]: SSRN, [2022]

Umfang: 1 Online-Ressource (37 p)

Sprache: Englisch

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Beschreibung: The coexistence of antibiotics and heavy metals in soil has attracted increasing attention due to their negative effects on functional microorganisms related to nitrogen cycle. This work were to explore the individual and combined effects of sulfamethazine (SMT) and cadmium (Cd), selected as target pollutants in soil, on nitrification potential rates (PNR) and ammonia oxidizers (ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB)) structure and diversity by 56-day cultivation experiment. Results showed that PNR in Cd or SMT treated soil decreased at the beginning of the experiment and then increased with the incubation period extension. PNR was significantly correlated with AOA-and AOB- amoA relative abundance ( P < 0.01). SMT addition (10 and 100 mg kg -1 ) significantly improved AOA activity by 13.93% and 17.93%, respectively, and had no effect on AOB at 1d. Cd was more toxic to AOA and AOB than SMT. SMT alleviated the toxicity of Cd to AOA and AOB. High-throughput sequencing results revealed that Cd or/and SMT increased and reduced the community richness of AOA and AOB, respectively, but reduced the diversity of both after 56d. Cd and SMT significantly changed the relative abundance of AOA phylum levels and AOB genus levels in the soil

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