Xu Wei, Gong LinFeng, Yang Shuai, Gao Yuanhao, Ma Xiaowan, Xu Limei, Chen Haisheng, Luo Zhuhua
Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China.
Fourth Institute of Oceanography, Ministry of Natural Resources, Beihai, China.
Front Microbiol. 2020 Nov 26;11:575287. doi: 10.3389/fmicb.2020.575287. eCollection 2020.
The genus inhabit estuarine and marine ecosystem throughout the world and can cause severe infections in humans and animals. Previous studies have demonstrated the dynamics of at both community and population levels and assessed the close relationship between environmental factors and diversity and abundance, such as temperature, salinity, and dissolved oxygen. It is also generally believed that aquaculture is the fastest-growing food sector, which is also applying great environmental impacts on microbial communities in aquatic ecosystems. However, our understanding of the spatiotemporal quantification of throughout the four seasons in the aquaculture zone and response to environmental factors remains poor. To explore the spatiotemporal distribution and abundance of the community with their related environmental factors and detect the relationships among them, we collected 10 seawater sites spanning four seasons across the whole year in Dongshan Bay for investigating the community dynamics. Marked differences in diversity and abundance of the community were observed between seasons, which were mainly driven by temperature, dissolved oxygen, nitrate, and nitrite. qPCR analysis showed that abundance was most abundant in the summer (5.37 × 10 copies/L), compared with the autumn (4.58 × 10 copies/L), spring (1.18 × 10 copies/L), and winter (1.55 × 10 copies/L). A total of 22 operational taxonomic units (OTUs) and 28 species were identified by universal bacteria 16S rRNA gene and cultivation methods, with the dominant in these aquaculture areas. To summarize, our present study is one of the few studies to research the occurrence of in marine aquaculture of South China, and the results indicate that are widely distributed in aquaculture environment and that a further risk assessment is needed to be conducted.
该属遍布全球的河口和海洋生态系统，可导致人类和动物发生严重感染。先前的研究已经揭示了其在群落和种群水平上的动态变化，并评估了环境因素与物种多样性和丰度之间的密切关系，如温度、盐度和溶解氧。人们普遍还认为，水产养殖业是增长最快的食品行业，这也对水生生态系统中的微生物群落产生了巨大的环境影响。然而，我们对水产养殖区全年四季中该属的时空定量以及对环境因素的响应仍知之甚少。为了探究该属群落的时空分布、丰度及其相关环境因素，并检测它们之间的关系，我们在东山湾全年跨四个季节采集了10个海水样本点，以调查该属群落动态。在不同季节间观察到该属群落的多样性和丰度存在显著差异，其主要受温度、溶解氧、硝酸盐和亚硝酸盐驱动。定量聚合酶链反应（qPCR）分析表明，该属丰度在夏季最高（5.37×10拷贝/L），而秋季（4.58×10拷贝/L）、春季（1.18×10拷贝/L）和冬季（1.55×10拷贝/L）相对较低。通过通用细菌16S rRNA基因和培养方法共鉴定出22个该属的可操作分类单元（OTU）和28个物种，该属在这些养殖区域占主导地位。总之，我们目前的研究是少数关于中国南方海水养殖中该属发生情况的研究之一，结果表明该属在养殖环境中广泛分布，需要进一步进行风险评估。
