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首页> 外文期刊>Applied Microbiology >Archaeal Populations in Hypersaline Sediments Underlying Orange Microbial Mats in the Napoli Mud Volcano
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Archaeal Populations in Hypersaline Sediments Underlying Orange Microbial Mats in the Napoli Mud Volcano

机译：那不勒斯泥火山中橙色微生物垫下面的高盐沉积物中的古细菌种群。

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Microbial mats in marine cold seeps are known to be associated with ascending sulfide- and methane-rich fluids. Hence, they could be visible indicators of anaerobic oxidation of methane (AOM) and methane cycling processes in underlying sediments. The Napoli mud volcano is situated in the Olimpi Area that lies on saline deposits; from there, brine fluids migrate upward to the seafloor. Sediments associated with a brine pool and microbial orange mats of the Napoli mud volcano were recovered during the Medeco cruise. Based on analysis of RNA-derived sequences, the “active” archaeal community was composed of many uncultured lineages, such as rice cluster V or marine benthic group D. Function methyl coenzyme M reductase ( mcrA ) genes were affiliated with the anaerobic methanotrophic Archaea (ANME) of the ANME-1, ANME-2a, and ANME-2c groups, suggesting that AOM occurred in these sediment layers. Enrichment cultures showed the presence of viable marine methylotrophic Methanococcoides in shallow sediment layers. Thus, the archaeal community diversity seems to show that active methane cycling took place in the hypersaline microbial mat-associated sediments of the Napoli mud volcano.
机译：已知海洋冷渗中的微生物垫与上升的富含硫化物和甲烷的流体有关。因此，它们可能是甲烷厌氧氧化（AOM）和底层沉积物中甲烷循环过程的可见指示。那不勒斯泥火山位于奥林皮地区，该地区位于盐类沉积物上。盐水从那里向上迁移到海底。在Medeco航行期间，回收了与那不勒斯泥火山的盐水池和微生物橙色垫相关的沉积物。根据对RNA衍生序列的分析，“活跃的”古细菌群落由许多未培养的谱系组成，例如水稻簇V或海洋底栖生物D组。功能性甲基辅酶M还原酶（mcrA）基因与厌氧甲烷营养型古细菌（ ANME-1，ANME-2a和ANME-2c组的ANME），表明AOM发生在这些沉积层中。富集培养显示浅层沉积物中存在可行的海洋甲基营养型甲烷菌。因此，古细菌群落的多样性似乎表明活跃的甲烷循环发生在那不勒斯泥火山的高盐微生物垫相关沉积物中。

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