ABSTRACT

Understanding the effects of eutrophication on heterotrophic bacteria, a primary responder to eutrophication, is critical for predicting the responses of ecosystems to marine environmental pollution. Vibrio are indigenous in coastal water and of significance to geochemical cycling and public health. In this study, we investigated the diversity and assembly features of Vibrio, as well as their relationship with the environmental factors in the subtropical Beibu Gulf. We found that the alpha diversity of Vibrio increased in parallel with the trophic state they occupy. A Mantel test indicated that the trophic state was correlated to Vibrio beta diversity and the correlation gradually strengthened at higher trophic states. Variation partitioning analysis suggested that the geographic distance was an important factor impacting the variables of Vibrio communities in all the samples, but nutrients exerted more influence in the more highly eutrophic samples. Our results demonstrated that stochastic processes govern the turnover of marine Vibrio communities in the Beibu Gulf and that ecological drift was the most important process for assembly of the Vibrio communities.

中文翻译：

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在亚热带海湾，随机过程主导着海洋自由生活弧菌社区的组装

摘要

了解富营养化对异养细菌的影响，异养细菌是富营养化的主要响应者，对于预测生态系统对海洋环境污染的响应至关重要。弧菌是沿海水域中的原生动物，对地球化学循环和公共卫生具有重要意义。在这项研究中，我们研究了弧菌的多样性和组装特征，以及它们与亚热带北部湾的环境因素之间的关系。我们发现弧菌的α多样性随着它们所占据的营养状态而增加。壁炉架测试表明营养状态与弧菌有关在较高的营养状态下，β多样性及其相关性逐渐增强。变异分区分析表明，地理距离是影响所有样品中弧菌群落变量的重要因素，但营养水平较高的营养样品的影响更大。我们的结果表明，随机过程控制着北部湾海洋弧菌社区的营业额，而生态漂移是弧菌社区组装的最重要过程。