Bacterial communities from soil sediments of a mountain oasis in northern Oman
Bacterial communities from soil sediments of a mountain oasis in northern Oman
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DOI：
10.1016/j.catena.2010.05.007
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发表时间：
2010-08
期刊：
影响因子：
6.2
通讯作者：
Jong-Shik Kim;D. Crowley;A. Buerkert
中科院分区：
文献类型：
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作者：
Jong-Shik Kim;D. Crowley;A. Buerkert
通过对阿曼北方绿洲附近20米深剖面的古生态学研究，获得了一个时间序列，揭示了该地区19,000年来植被、环境和人类住区发展之间的关系。结合分析的化学和物理性质的这个配置文件，我们假设，细菌群落结构与此时序也可能构成的地球化学记录的气候历史，已保存在这个网站的一部分。为了验证这一假设，我们研究了群落的组成，这是通过沿着整个剖面沿着每隔1米对16 S rRNA基因进行分析所揭示的。我们的研究结果表明，随着深度的增加，细菌群落发生了明显的变化，这与微炭颗粒的出现所表明的气候记录的差异相对应。16 S rRNA基因的测序证明了酸杆菌、放线菌、变形菌、芽单胞菌、绿杆菌和来自候选部门SPAM、NC 10和OP 10的代表的存在。在社区的差异支持的假设，即沉积物中的细菌物种组成反映了有机质和植被的性质，在他们被沉积的时候。
Paleoecological records of a 20meter deep profile near an oasis settlement in northern Oman have yielded a chronosequence providing insights into relationships between vegetation, the environment and development of human settlements in this area over a period of time spanning 19,000years. In conjunction with analysis of the chemical and physical properties of this profile, we hypothesized that bacterial community structures associated with this chronosequence may also constitute a part of the biogeochemical record of the climate history that has been preserved at this site. To examine this hypothesis, we studied the composition of the community as revealed by profiling of 16S rRNA genes at 1meter intervals along the entire profile. The results of our study show distinct changes in bacterial communities with increasing depth that correspond with differences in the climatic record as indicated by the occurrence of micro-charcoal particles. Sequencing of 16S rRNA genes proved the presence of Acidobacteria, Actinobacteria, Proteobacteria, Gemmatimonadetes, Chloroflexi and representatives from the candidate divisions SPAM, NC10, and OP10. Differences in the communities support the hypothesis that the bacterial species compositions in the sediment reflect properties of the organic matter and vegetation at the time they were deposited.