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首页> 外文期刊>International microbiology: the official journal of the Spanish Society for Microbiology >Phylogenetic diversity of sediment bacteria from the deep Northeastern Pacific Ocean: a comparison with the deep Eastern Mediterranean Sea
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Phylogenetic diversity of sediment bacteria from the deep Northeastern Pacific Ocean: a comparison with the deep Eastern Mediterranean Sea

机译：东北太平洋深部沉积物细菌的系统发育多样性：与地中海深部的比较

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摘要

The variability of bacterial community composition and diversity was studied by comparative analysis of five 16S rRNA gene clone libraries from deep-sea sediments (water column depth: 4000 m) of the Northeastern Pacific Ocean and Eastern Mediterranean Sea. This is the first comparison of the bacterial communities living in these deep-sea ecosystems. The estimated chlorophyll a, organic carbon, and C/N ratio provided evidence of significant differences in the trophic state of the sediments between the Northeastern Pacific Ocean and the much warmer Eastern Mediterranean Sea. A diverse range of 16S rRNA gene phylotypes was found in the sediments of both regions. These were represented by 11 different taxonomic groups, with Gammaproteobacteria predominating in the Northeastern Pacific Ocean sediments and Acidobacteria in the Eastern Mediterranean microbial community. In addition, several 16S rRNA gene phylotypes only distantly related to any of the pre-viously identified sequences (non-affiliated rRNA genes) represented a significant fraction of the total sequences. The poten-tial diversity at the two sites differs but remains largely unexplored and remains of continuing scientific interest.
机译：通过比较分析东北太平洋和东地中海深海沉积物（水柱深度：4000 m）中的五个16S rRNA基因克隆文库，研究了细菌群落组成和多样性的变异性。这是生活在这些深海生态系统中的细菌群落的首次比较。估计的叶绿素a，有机碳和C / N比值提供了证据，表明东北太平洋和温暖得多的东地中海之间沉积物的营养状态存在显着差异。在两个地区的沉积物中都发现了各种各样的16S rRNA基因系统型。它们由11个不同的生物分类群代表，其中东北太平洋沉积物中的丙型杆菌占主导地位，而东地中海微生物群落中的嗜酸菌占据主导地位。另外，仅与任何先前鉴定的序列（非附属rRNA基因）远距离相关的几种16S rRNA基因系统型占总序列的很大一部分。这两个地点的潜力多样性各不相同，但在很大程度上尚未得到探索，并且仍具有持续的科学兴趣。

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