Abstract
Vibrio are widely distributed in aquatic environments and strongly associated with eutrophic environments and human health through the consumption of contaminated seafood. However, the response of the Vibrio community to seasonal variation in eutrophic environments is poorly understood. In this study, we used a Vibrio-specific 16S rRNA sequencing approach to reveal the seasonal distribution pattern and diversity of the Vibrio community in the Maowei Sea, Beibu Gulf of China. The Shannon diversity of the Vibrio community was highest in the summer, while β-diversity analysis showed that Vibrio community structures were significantly different between seasons. Distance-based redundancy analysis (dbRDA) and Mantel test analysis suggested that total dissolved nitrogen (TDN), total dissolved phosphorus (TDP), dissolved inorganic nitrogen (DIN), salinity, and temperature were the key environmental factors shaping the Vibrio community structure, indicating a strong filtering effect of trophic condition on Vibrio communities. Furthermore, through random forest analysis, V. fluvialis, V. alginolyticus, V. proteolyticus, V. splendidus, and the other eight Vibrio species were more sensitive to eutrophic changes. This study revealed seasonal changes in Vibrio communities and the influence of environmental variation on Vibrio community composition, contributing to a better understanding of their potential ecological roles in a subtropical inland bay.
Highlights
The genus Vibrio consists of heterotrophic bacteria that are common in marine ecosystems, especially in coastal areas (Westrich, 2015; Shelford and Suttle, 2018; Zhang et al, 2019)
The environmental parameters of seawater samples collected from the Maowei Sea in the Beibu Gulf were measured during the seasonal cruises (Supplementary Table 1)
This study demonstrated that highly diverse Vibrio communities were present in the Maowei Sea with great temporal resolution
Summary
The genus Vibrio consists of heterotrophic bacteria that are common in marine ecosystems, especially in coastal areas (Westrich, 2015; Shelford and Suttle, 2018; Zhang et al, 2019). The genus Vibrio encompasses many facultatively symbiotic and potential pathogenic strains, such as Vibrio cholerae, Vibrio parahaemolyticus, and Vibrio vulnificus, which are all capable of infecting humans through the consumption of Seasonal Variation of Vibrio Community contaminated seafood (Guin et al, 2019; hun Yoon and Waters, 2019; King et al, 2019). Since they drive major biogeochemical cycles and support food webs globally, Vibrio communities are a vital component of the marine ecosystem. The response of the Vibrio community to seasonal variation in eutrophic environments is still poorly understood
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