Articles | Volume 18, issue 12
Biogeosciences, 18, 3733–3749, 2021
https://doi.org/10.5194/bg-18-3733-2021
Biogeosciences, 18, 3733–3749, 2021
https://doi.org/10.5194/bg-18-3733-2021

Research article 22 Jun 2021

Research article | 22 Jun 2021

Hydrographic fronts shape productivity, nitrogen fixation, and microbial community composition in the southern Indian Ocean and the Southern Ocean

Cora Hörstmann et al.

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Short summary
Microbes are the main drivers of productivity and nutrient cycling in the ocean. We present a combined approach assessing C and N uptake and microbial community diversity across ecological provinces in the Southern Ocean and southern Indian Ocean. Provinces showed distinct genetic fingerprints, but microbial activity varied gradually across regions, correlating with nutrient concentrations. Our study advances the biogeographic understanding of microbial diversity across C and N uptake regimes.
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