Biogeographical distribution and diversity of bacterial communities in surface sediments of the South China Sea.
Biogeographical distribution and diversity of bacterial communities in surface sediments of the South China Sea.
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DOI：
10.4014/jmb.1209.09040
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发表时间：
2013-05
影响因子：
2.8
通讯作者：
Tao Li;Pengfei Wang
中科院分区：
文献类型：
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作者：
Tao Li;Pengfei Wang
对南海表层沉积物细菌群落特征进行了研究。特别是，从珊瑚礁平台，大陆坡和深海盆地收集的沉积物中发现的细菌的地理分布模式和系统发育多样性进行了测定。通过对16S rRNA基因的观察，对细菌的多样性进行了测定，并在细菌克隆文库中鉴定出18个系统发育组。浮游菌纲、δ变形菌纲、候选菌纲OP 11和α变形菌纲构成了样品中的大多数细菌，它们的平均细菌克隆分别为16%、15%、12%和9%。通过比较，在南海表层沉积物中发现的细菌群落与以前观察到的其他深海细菌群落有显着不同。这项研究还强调了地理因素对细菌群落地理分布模式的影响。典型对应分析表明，沙重百分比和水深是影响细菌群落组成的重要因素。因此，这项研究强调了充分确定地理因素与世界海洋中细菌分布之间关系的重要性。
This paper aims at an investigation of the features of bacterial communities in surface sediments of the South China Sea (SCS). In particular, biogeographical distribution patterns and the phylogenetic diversity of bacteria found in sediments collected from a coral reef platform, a continental slope, and a deep-sea basin were determined. Bacterial diversity was measured by an observation of 16S rRNA genes, and 18 phylogenetic groups were identified in the bacterial clone library. Planctomycetes, Deltaproteobacteria, candidate division OP11, and Alphaproteobacteria made up the majority of the bacteria in the samples, with their mean bacterial clones being 16%, 15%, 12%, and 9%, respectively. By comparison, the bacterial communities found in the SCS surface sediments were significantly different from other previously observed deep-sea bacterial communities. This research also emphasizes the fact that geographical factors have an impact on the biogeographical distribution patterns of bacterial communities. For instance, canonical correspondence analyses illustrated that the percentage of sand weight and water depth are important factors affecting the bacterial community composition. Therefore, this study highlights the importance of adequately determining the relationship between geographical factors and the distribution of bacteria in the world's seas and oceans.