Microbial Community Stratification Controlled by the Subseafloor Fluid Flow and Geothermal Gradient at the Iheya North Hydrothermal Field in the Mid-Okinawa Trough (Integrated Ocean Drilling Program Expedition 331)
Microbial Community Stratification Controlled by the Subseafloor Fluid Flow and Geothermal Gradient at the Iheya North Hydrothermal Field in the Mid-Okinawa Trough (Integrated Ocean Drilling Program Expedition 331)
复制标题
冲绳中部海槽伊平屋北热液田海底流体流动和地温梯度控制的微生物群落分层（综合大洋钻探计划第331号探险）
DOI：
10.1128/aem.01741-14
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发表时间：
2014
影响因子：
4.4
通讯作者：
K. Takai
中科院分区：
文献类型：
--
作者：
Yanagawa;A. Breuker;A. Schippers;M. Nishizawa;A. Ijiri;M. Hirai;Y. Takaki;M. Sunamura;T. Urabe;T. Nunoura;K. Takai
在冲绳海槽中部Iheya北热液田的边缘位置，研究了岩性结构和地热梯度对海底下微生物群落的影响。在综合大洋钻探计划第331次考察期间，在C0017站点海底以下151米深处采集到了由半深海泥和火山碎屑沉积物组成的海底沉积物。根据16S rRNA基因克隆测序结果推测，低温半远洋沉积物中的微生物群落主要由绿弯藻和深海古菌组成。与此相反，16S rRNA基因序列的海洋第一组Thaumarchaeota占主导地位的粗粒浮岩砾石半远洋沉积物之间的微生物群落类型。基于沉积物的物理性质，如温度和渗透性，孔隙水化学，和微生物群落类型的组合物，在沉积物的物理性质的转变，建议诱导一个潜在的海底充氧海水在渗透带的补给流，导致在海底下的栖息地产生可变的化学环境和微生物群落。此外，在高温条件下（190 °C）沉积物的最深部分含有未培养的热水泉古菌群IV的古菌谱系序列，可能与高温热液流体流有关。这些结果表明，海底微生物群落的组成和功能在热液场的边缘站点的高度影响的复杂的流体流动结构，如补给海水和下伏热液流体，再加上沉积物的岩性转变。
The impacts of lithologic structure and geothermal gradient on subseafloor microbial communities were investigated at a marginal site of the Iheya North hydrothermal field in the Mid-Okinawa Trough. Subsurface marine sediments composed of hemipelagic muds and volcaniclastic deposits were recovered through a depth of 151 m below the seafloor at site C0017 during Integrated Ocean Drilling Program Expedition 331. Microbial communities inferred from 16S rRNA gene clone sequencing in low-temperature hemipelagic sediments were mainly composed of members of the Chloroflexi and deep-sea archaeal group. In contrast, 16S rRNA gene sequences of marine group I Thaumarchaeota dominated the microbial phylotype communities in the coarse-grained pumiceous gravels interbedded between the hemipelagic sediments. Based on the physical properties of sediments such as temperature and permeability, the porewater chemistry, and the microbial phylotype compositions, the shift in the physical properties of the sediments is suggested to induce a potential subseafloor recharging flow of oxygenated seawater in the permeable zone, leading to the generation of variable chemical environments and microbial communities in the subseafloor habitats. In addition, the deepest section of sediments under high-temperature conditions (∼90°C) harbored the sequences of an uncultivated archaeal lineage of hot water crenarchaeotic group IV that may be associated with the high-temperature hydrothermal fluid flow. These results indicate that the subseafloor microbial community compositions and functions at the marginal site of the hydrothermal field are highly affected by the complex fluid flow structure, such as recharging seawater and underlying hydrothermal fluids, coupled with the lithologic transition of sediments.
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影响因子：
56.9
作者：
D'Hondt, S;Jorgensen, BB;Acosta, JLS
通讯作者：
Acosta, JLS
影响因子：
4.4
作者：
Nunoura, Takuro;Oida, Hanako;Takai, Ken
通讯作者：
Takai, Ken
影响因子：
16.6
作者：
B. Orcutt;C. Wheat;O. Rouxel;S. Hulme;K. Edwards;W. Bach
通讯作者：
B. Orcutt;C. Wheat;O. Rouxel;S. Hulme;K. Edwards;W. Bach
DOI：
10.1073/pnas.0511033103
发表时间：
2006-02-21
影响因子：
11.1
作者：
Inagaki, F;Nunoura, T;Jorgensen, BB
通讯作者：
Jorgensen, BB
影响因子：
4.2
作者：
Breuker, Anja;Stadler, Susanne;Schippers, Axel
通讯作者：
Schippers, Axel