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New insights into the effects of antibiotics and copper on microbial community diversity and carbon source utilization

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Abstract

Residual antibiotics (ABs) and heavy metals (HMs) are continuously released from soil, reflecting their intensive use and contamination of water and soil, posing an environmental problem of great concern. Relatively few studies exist of the functional diversity of soil microorganisms under the combined action of ABs and HMs. To address this deficiency, BIOLOG ECO microplates and the Integrated Biological Responses version 2 (IBRv2) method were used to comprehensively explore the effects of single and combined actions of copper (Cu) and enrofloxacin (ENR), oxytetracycline (OTC), and sulfadimidine (SM2) on the soil microbial community. The results showed that the high concentration (0.80 mmol/kg) compound group had a significant effect on average well color development (AWCD) and OTC showed a dose–response relationship. The results of IBRv2 analysis showed that the single treatment group of ENR or SM2 had a significant effect on soil microbial communities, and the IBRv2 of E1 was 5.432. Microbes under ENR, SM2, and Cu stress had more types of available carbon sources, and all treatment groups were significantly more enriched with microorganisms having D-mannitol and L-asparagine as carbon sources. This study confirms that the combined effects of ABs and HMs can inhibit or promote the function of soil microbial communities. In addition, this paper will provide new insights into IBRv2 as an effective method to evaluate the impacts of contaminants on soil health.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China [Grant number 41671320], the Natural Science Foundation of Shandong Province, China [ZR2016JL029], and the Special Funds of Taishan Scholar of Shandong Province, China [Grant number JQ201711].

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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by WZ, SM and JW. The first draft of the manuscript was written by WZ, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Jinhua Wang.

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Zhang, W., Wang, J., Zhu, L. et al. New insights into the effects of antibiotics and copper on microbial community diversity and carbon source utilization. Environ Geochem Health 45, 4779–4793 (2023). https://doi.org/10.1007/s10653-023-01491-1

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  • DOI: https://doi.org/10.1007/s10653-023-01491-1

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