Impacts of anthropogenic disturbances on microbial community of coastal waters in Shenzhen, South China
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Impacts of anthropogenic disturbances on microbial community of coastal waters in Shenzhen, South China Rui Zhang1,2 Wen-chao Liu1,3 Yu Liu1,3 Hong-lian Zhang1,2 Zhi-hui Zhao1,3 Ling-yun Zou4 Yu-chun Shen5 Wen-Sheng Lan 6 ●
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Accepted: 20 October 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract During the urbanization, human activities have brought great changes to marine biodiversity and microbial communities of coastal water. Shenzhen is a coastal city that has developed rapidly over the past four decades, but the microbial communities and metabolic potential in offshore water are still not well characterized. Here, 16S rRNA gene V4-V5 sequencing was conducted to determine the microbial components from coastal waters in twenty selected areas of Shenzhen. The results showed a significant difference on the microbial composition between the western and eastern waters. Samples from western coast had more abundant Burkholderiaceae, Sporichthyaceae, Aeromonadaceae, and Methylophilaceae compared to eastern coast, and at the genus level, Candidatus Aquiluna, Aeromonas, Arcobacter, Ottowia and Acidibacter were significantly higher in western waters. There was also a notable difference within the western sample group, suggesting the taxa-compositional heterogeneity. Moreover, analysis of environmental factors and water quality revealed that salinity, pH and dissolved oxygen were relatively decreased in western samples, while total nitrogen, total phosphorus, chemical oxygen demand, and harmful marine vibrio were significantly increased compared to eastern waters. The results suggest the coastal waters pollution is more serious in western Shenzhen than eastern Shenzhen and the microbial communities are altered, which can be associated with anthropogenic disturbances. Keywords Microbial communities Coastal waters 16S rRNA Diversity ●
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Introduction Coastal habitats, located between terrestrial and marine ecosystems, harbor many archaea and bacteria of earth’s
These authors contributed equally: Rui Zhang, Wen-chao Liu Supplementary information The online version of this article (https:// doi.org/10.1007/s10646-020-02297-y) contains supplementary material, which is available to authorized users.
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total living biomass (Flemming and Wuertz, 2019, Orsi et al. 2016). Archaea are ubiquitous in marine water columns, which play major roles in the global cycle of carbon (Ingalls et al. 2006) and nitrogen (Santoro et al. 2011). Increased numbers of multi-drug resistant bacteria were found in offshore and coastal sites, which is likely contributed by anthropogenic activities (Ullah et al. 2019). Shenzhen is a coastal city that has developed rapidly over the past four decades, and it has become one of the most
* Rui Zhang [email protected]
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* Wen-Sheng Lan [email protected]
Baoan Women’s and Children’s Hospital, Jinan University, Shenzhen 518102, PR China
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College of Fisheries, Guangdong Ocean University, Zhanjiang, Guangdong 524088, PR
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