Bacterial vertical and horizontal variability around a deep seamount in the Tropical Western Pacific Ocean.
Bacterial vertical and horizontal variability around a deep seamount in the Tropical Western Pacific Ocean.
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DOI：
10.1016/j.marpolbul.2020.111419
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发表时间：
2020-09
影响因子：
5.8
通讯作者：
Qiqi Sun;Jinming Song;Xuegang Li;Huamao Yuan;Jun Ma;Qidong Wang
中科院分区：
文献类型：
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作者：
Qiqi Sun;Jinming Song;Xuegang Li;Huamao Yuan;Jun Ma;Qidong Wang
海底山细菌群落的研究仍处于起步阶段。对热带西太平洋M5海山附近细菌群落的空间变异进行了研究。我们的结果显示，细菌群落的垂直变异性比水平变异性更大。细菌多样性随水体深度的增加而增加，复杂性随采样深度的增加而增加。所有站位均具有水体质量特异性细菌群落组成，除最深的B2层呈渐变状外，其余各层以放线菌和厚壁菌为主，其余各层以α变形菌为主。主要阶数在海山两侧呈对称分布趋势，其中B段差异大于A段差异，可能与沿B段的北赤道西流和逆次流有关，也可能与上升流有关。海底山主要通过地形-水流相互作用对周围水体细菌水平分布产生一定影响。
Research on bacterial communities in seamounts is still in its infancy. Spatial variability of bacterial communities was investigated around M5 seamount of the Tropical Western Pacific Ocean. Our results revealed greater variability of bacterial communities vertically than horizontally. Bacterial diversity generally increased with depths within water column and the complexity increased with the sampling depths. All stations had water mass-specific bacterial community compositions, with distinct bacterial community structure between the bottom layer (being Actinobacteria and Firmicutes-dominant) and other layers (being Alphaproteobacteria-dominant), except the deepest B2 which showed gradual transition. Major orders tended to be distributed symmetrically at bilateral sides of the seamount with more differences occurring at section B than at section A, possibly due to the westward North Equatorial Current (NEC) along section B and reverse subcurrent, as well possible upwelling. Seamount exerted certain effect on bacterial horizontal distribution in the surrounding water mainly through topography-current interaction.