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Article

Response of the Intertidal Microbial Community Structure and Metabolic Profiles to Zinc Oxide Nanoparticle Exposure

1
Dalian Ocean University, Dalian 116023, China
2
South China Institute of Environmental Science, Ministry of Ecology and Environment, Guangzhou 510655, China
3
Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China
4
Key Laboratory of Environment Controlled Aquaculture, Ministry of Education, Dalian 116023, China
*
Authors to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2020, 17(7), 2253; https://doi.org/10.3390/ijerph17072253
Received: 22 February 2020 / Revised: 23 March 2020 / Accepted: 24 March 2020 / Published: 27 March 2020
(This article belongs to the Special Issue Environmental Behavior of Nanomaterials)
The toxicity of nanomaterials to microorganisms is related to their dose and environmental factors. The aim of this study was to investigate the shifts in the microbial community structure and metabolic profiles and to evaluate the environmental factors in a laboratory scale intertidal wetland system exposed to zinc oxide nanoparticles (ZnO NPs). Microbial assemblages were determined using 16S rRNA high-throughput sequencing. Community-level physiological profiles were determined using Biolog-ECO technology. Results showed Proteobacteria was the predominant (42.6%–55.8%) phylum across all the sediments, followed by Bacteroidetes (18.9%–29.0%). The genera Azoarcus, Maribacter, and Thauera were most frequently detected. At the studied concentrations (40 mg·L−1, 80 mg·L−1, 120 mg·L−1), ZnO NPs had obvious impacts on the activity of Proteobacteria. Adverse effects were particularly evident in sulfur and nitrogen cycling bacteria such as Sulfitobacter, unidentified_Nitrospiraceae, Thauera, and Azoarcus. The alpha diversity index of microbial community did not reflect stronger biological toxicity in the groups with high NP concentrations (80 mg·L−1, 120 mg·L−1) than the group with low NP concentration (40 mg·L−1). The average well color development (AWCD) values of periodically submersed groups were higher than those of long-term submersed groups. The group with NP concentration (40 mg·L−1) had the lowest AWCD value; those of the groups with high NP concentrations (80 mg·L−1, 120 mg·L−1) were slightly lower than that of the control group. The beta diversity showed that tidal activity shaped the similar microbial community among the periodically submerged groups, as well as the long-term submerged groups. The groups with high DO concentrations had higher diversity of the microbial community, better metabolic ability, and stronger resistance to ZnO NPs than the groups with a low DO concentration. View Full-Text
Keywords: intertidal zone; ZnO NPs; microbial distribution; carbon metabolism; sediment intertidal zone; ZnO NPs; microbial distribution; carbon metabolism; sediment
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MDPI and ACS Style

Wu, Y.; Rong, X.; Zhang, C.; Zhang, R.; He, T.; Yu, Y.; Zhao, Z.; Yang, J.; Han, R. Response of the Intertidal Microbial Community Structure and Metabolic Profiles to Zinc Oxide Nanoparticle Exposure. Int. J. Environ. Res. Public Health 2020, 17, 2253. https://doi.org/10.3390/ijerph17072253

AMA Style

Wu Y, Rong X, Zhang C, Zhang R, He T, Yu Y, Zhao Z, Yang J, Han R. Response of the Intertidal Microbial Community Structure and Metabolic Profiles to Zinc Oxide Nanoparticle Exposure. International Journal of Environmental Research and Public Health. 2020; 17(7):2253. https://doi.org/10.3390/ijerph17072253

Chicago/Turabian Style

Wu, Yinghai, Xinyu Rong, Cuiya Zhang, Renduo Zhang, Tao He, Yunjun Yu, Zhuangming Zhao, Jing Yang, and Rui Han. 2020. "Response of the Intertidal Microbial Community Structure and Metabolic Profiles to Zinc Oxide Nanoparticle Exposure" International Journal of Environmental Research and Public Health 17, no. 7: 2253. https://doi.org/10.3390/ijerph17072253

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