Key Laboratory of Utilization and Conservation for Tropical Marine Bioresources (Hainan Tropical Ocean University), Ministry of Education, Sanya, 572022, China.
Hainan Key Laboratory for Conservation and Utilization of Tropical Marine Fishery Resources, Hainan Tropical Ocean University, Sanya, 572022, China.
Curr Microbiol. 2020 Jul;77(7):1292-1300. doi: 10.1007/s00284-020-01933-4. Epub 2020 Mar 5.
Characterizing soil bacterial community is important to understand microbial distribution affected by environmental factors. Here, we investigated the bacterial communities distributed from different location on Nanshazhou island, South China Sea. We collected and compared soil bacterial communities from central island, intertidal island, and inshore island. Results showed no difference in the bacterial richness and diversity for the soils from the three different locations. However, weighted and unweighted UniFrac distances analysis revealed that the three soil samples were clearly separated from each other. Five bacterial phyla, including Proteobacteria, Bacteroidetes, Verrucomicrobia, Spirochaetes and Tenericutes were more abundant in the inshore island sample; while Deinococcus-Thermus was more abundant in the intertidal island sample; and the central island sample had more abundant Gemmatimonadetes and Planctomycetes. Bacterial structure showed significantly positive relationships with organic matter content, but it was significantly negatively correlated with sodium content. Furthermore, a network analysis based on Spearman correlation coefficients showed that there were similar numbers of positive and negative correlations within the bacterial community of Nanshazhou island. Our results revealed that the soil bacterial communities in the three sampling sites were easily affected by environmental fluctuations.
描述土壤细菌群落对于理解受环境因素影响的微生物分布非常重要。在这里，我们调查了南海南沙洲岛不同位置的细菌群落。我们采集并比较了中心岛、潮间带岛和近岸岛的土壤细菌群落。结果表明，来自这三个不同位置的土壤的细菌丰富度和多样性没有差异。然而，加权和非加权 UniFrac 距离分析表明，这三个土壤样本彼此明显分离。五个细菌门，包括变形菌门、拟杆菌门、疣微菌门、螺旋体门和柔膜菌门，在近岸岛样本中更为丰富；而 Deinococcus-Thermus 在潮间带岛样本中更为丰富；而中心岛样本则有更多的 Gemmatimonadetes 和浮霉菌门。细菌结构与有机质含量呈显著正相关，但与钠含量呈显著负相关。此外，基于 Spearman 相关系数的网络分析表明，南沙洲岛细菌群落内的正相关和负相关数量相似。我们的结果表明，三个采样点的土壤细菌群落很容易受到环境波动的影响。
