Key Laboratory of Environment Change and Resources Use in Beibu Gulf, Ministry of Education (Nanning Normal University), 175 Mingxiu East Road, Nanning, Guangxi, 530001, China.
Department of Biological Sciences, Kyonggi University, 154-42, Gwanggyosan-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do, 16227, South Korea.
FEMS Microbiol Ecol. 2020 Oct 20;96(11). doi: 10.1093/femsec/fiaa198.
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.
了解富营养化对异养细菌（富营养化的主要响应者）的影响对于预测生态系统对海洋环境污染的响应至关重要。弧菌是沿海水域的本地菌，对地球化学循环和公共卫生具有重要意义。在本研究中，我们调查了亚热带北部湾中弧菌的多样性和组装特征，以及它们与环境因素的关系。我们发现，弧菌的α多样性与它们所处的营养状态呈平行增加。Mantel 检验表明，营养状态与弧菌β多样性相关，且相关性在更高的营养状态下逐渐增强。变异划分分析表明，地理距离是影响所有样本中弧菌群落变量的重要因素，但在营养程度较高的样本中，养分的影响更大。我们的结果表明，随机过程控制着北部湾海洋弧菌群落的周转，生态漂移是弧菌群落组装的最重要过程。
