Biogeosciences
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Articles | Volume 23, issue 2
Articles | Volume 23, issue 2
https://doi.org/10.5194/bg-23-509-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-509-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 2
Research article
 | 
20 Jan 2026
Research article |  | 20 Jan 2026

Spatiotemporal heterogeneity in diazotrophic communities reveals novel niche zonation on the continental shelf of the East China Sea

Guangming Mai, Han Zhang, Meng Chen, and Tuo Shi

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Short summary
We present taxon-specific niche zonation of nitrogen-fixing (diazotrophic) microbes in the East China Sea. We show spatiotemporal variations in the distribution and activity of diazotrophic ecotypes that are highly correlated with distinct water masses. The realized niche partitioning underscores the link between diazotrophic biogeography and physicochemical gradients created by complex land-ocean interactions, which are primarily affected by the Kuroshio intrusion and the East Asia monsoon.
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