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首页> 外文期刊>The ISME journal emultidisciplinary journal of microbial ecology >Abundance and distribution of Archaea in the subseafloor sedimentary biosphere
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Abundance and distribution of Archaea in the subseafloor sedimentary biosphere

机译：海底沉积生物圈古代古代的丰富与分布

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摘要

Subseafloor sedimentary environments harbor a remarkable number of microorganisms that constitute anaerobic and aerobic microbial ecosystems beneath the ocean margins and open-ocean gyres, respectively. Microbial biomass and diversity richness generally decrease with increasing sediment depth and burial time. However, there has been a long-standing debate over the contribution and distribution of Archaea in the subseafloor sedimentary biosphere. Here we show the global quantification of archaeal and bacterial 16S rRNA genes in 221 sediment core samples obtained from diverse oceanographic settings through scientific ocean drilling using microfluidic digital PCR. We estimated that archaeal cells constitute 37.3% of the total microbial cells (40.0% and 12.8% in the ocean margin and open-ocean sites, respectively), corresponding to 1.1 x 10(29) cells on Earth. In addition, the relative abundance of archaeal 16S rRNA genes generally decreased with the depth of water in the overlying sedimentary habitat, suggesting that Archaea may be more sensitive to nutrient quality and quantity supplied from the overlying ocean.
机译：海底沉积环境分别介于海洋边缘和开阔的海洋陀螺下面构成厌氧和有氧微生物生态系统的显着微生物数量。微生物生物量和多样性丰富通常随着沉积物深度和埋地的增加而降低。但是，对海底沉积物生物圈的贡献和分配已经存在长期争论。在这里，我们通过使用微流体数码PCR通过科学海洋钻探从不同的海洋环境中获得的221个沉积物核心样品中的古物和细菌16S rRNA基因的全局定量。我们估计，古细胞占总微生物细胞的37.3％（海洋边距和开阔的海洋部位）的37.3％，对应于地球上的1.1×10（29）个细胞。此外，亚弧16s rRNA基因的相对丰度通常随着覆盖沉积栖息地的水深而降低，表明古亚亚亚亚亚亚亚亚亚亚亚亚亚亚亚群岛的养分质量和数量更敏感。

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