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Ecological mechanisms and current systems shape the modular structure of the global oceans’ prokaryotic seascape
Milke, F.; Meyerjürgens, J.; Simon, M. (2023). Ecological mechanisms and current systems shape the modular structure of the global oceans’ prokaryotic seascape. Nature Comm. 14(1): 6141. https://dx.doi.org/10.1038/s41467-023-41909-z
In: Nature Communications. Nature Publishing Group: London. ISSN 2041-1723; e-ISSN 2041-1723
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  • Milke, F.
  • Meyerjürgens, J.
  • Simon, M.
Abstract
    Major biogeographic features of the microbial seascape in the oceans have been established and their underlying ecological mechanisms in the (sub)tropical oceans and the Pacific Ocean identified. However, we still lack a unifying understanding of how prokaryotic communities and biogeographic patterns are affected by large-scale current systems in distinct ocean basins and how they are globally shaped in line with ecological mechanisms. Here we show that prokaryotic communities in the epipelagic Pacific and Atlantic Ocean, in the southern Indian Ocean, and the Mediterranean Sea are composed of modules of co-occurring taxa with similar environmental preferences. The relative partitioning of these modules varies along latitudinal and longitudinal gradients and are related to different hydrographic and biotic conditions. Homogeneous selection and dispersal limitation were identified as the major ecological mechanisms shaping these communities and their free-living (FL) and particle-associated (PA) fractions. Large-scale current systems govern the dispersal of prokaryotic modules leading to the highest diversity near subtropical fronts.
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