Longxin Wang, Wencheng Zhao, Yun Jiang, Li Liu, Jianwei Chen, Fang Zhao, Xiaoyong Zhang, Keshu Zou
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Proteobacteria and Cyanobacteria were identified as the primary drivers of compositional differences between GZ and PRE. The Cyanobacteria Dolichospermum_NIES41 and Cuspidothrix issatschenkoi were only present in GZ, whereas the marine Gram-negative bacteria of Porticoccus litoralis and Thalassolituus oleivorans were unique to PRE.</p><p><strong>Conclusions: </strong>Bacterial community composition and diversity exhibit both similarities and differences between GZ and PRE; Proteobacteria and Cyanobacteria are key factors underlying these variations. Bacterial communities in both GZ and PRE are strongly influenced by human activities, and salinity is an important factor in controlling their differences. 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引用次数: 0
摘要
背景:珠江及其河口受到人为干扰的程度很高。由于细菌群落在水生生态系统中扮演着不可或缺的角色,人们越来越关注这些群落在人为干扰下的状况:本研究使用 16S rRNA 基因扩增子调查了珠江广州段至珠江口 29 个地点细菌群落的组成、多样性和结构。结果表明,广州段和珠江口段的细菌优势菌门相似,但两段的细菌群落组成和多样性存在显著差异。蛋白质细菌和蓝藻被认为是造成 GZ 和 PRE 组成差异的主要原因。蓝藻菌 Dolichospermum_NIES41 和 Cuspidothrix issatschenkoi 只存在于 GZ,而海洋革兰氏阴性菌 Porticoccus litoralis 和 Thalassolituus oleivorans 则是 PRE 独有的:细菌群落组成和多样性在 GZ 和 PRE 之间既有相似之处,也有差异;蛋白细菌和蓝藻是造成这些差异的关键因素。广州和珠江口地区的细菌群落都受到人类活动的强烈影响,而盐度是控制两者差异的重要因素。本研究对广州和珠江口地区的细菌群落进行了全面分析,为更好地管理受人类活动影响的水生生态系统奠定了基础。
Similarities and differences in bacterial communities between the Pearl River (Guangzhou section) and its estuary.
Background: The Pearl River and its estuary are highly exposed to anthropogenic disturbance. Because bacterial communities play an indispensable role in aquatic ecosystems, there has been an increased research focus on the statuses of these communities under human-induced perturbations.
Methods and results: This study investigated the composition, diversity, and structure of bacterial communities across 29 sites from the Guangzhou section of the Pearl River (GZ) to the Pearl River Estuary (PRE) using 16S rRNA gene amplicons. The results revealed similar dominant phyla of bacteria in both GZ and PRE, as well as significant differences in bacterial community composition and diversity between the two sections. Proteobacteria and Cyanobacteria were identified as the primary drivers of compositional differences between GZ and PRE. The Cyanobacteria Dolichospermum_NIES41 and Cuspidothrix issatschenkoi were only present in GZ, whereas the marine Gram-negative bacteria of Porticoccus litoralis and Thalassolituus oleivorans were unique to PRE.
Conclusions: Bacterial community composition and diversity exhibit both similarities and differences between GZ and PRE; Proteobacteria and Cyanobacteria are key factors underlying these variations. Bacterial communities in both GZ and PRE are strongly influenced by human activities, and salinity is an important factor in controlling their differences. This study provides a comprehensive analysis of the bacterial communities in GZ and PRE, establishing a foundation for better management of aquatic ecosystems impacted by anthropogenic activities.
期刊介绍:
Molecular Biology Reports publishes original research papers and review articles that demonstrate novel molecular and cellular findings in both eukaryotes (animals, plants, algae, funghi) and prokaryotes (bacteria and archaea).The journal publishes results of both fundamental and translational research as well as new techniques that advance experimental progress in the field and presents original research papers, short communications and (mini-) reviews.