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Ecological mechanisms and current systems shape the modular structure of the global oceans’ prokaryotic seascape
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Ecological mechanisms and current systems shape the modular structure of the global oceans’ prokaryotic seascape
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Journal Article
Ecological mechanisms and current systems shape the modular structure of the global oceans’ prokaryotic seascape
2023
Overview
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.
This study investigated how ecological mechanisms and large-scale oceanic current systems shape prokaryotic microbial community patterns. They show that prokaryotic communities in the upper 200 m of the Pacific and Atlantic Ocean, the southern Indian Ocean, and the Mediterranean Sea have a modular structure of co-occurring taxa with similar environmental preferences.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
