Biogeosciences
Biogeosciences
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Articles | Volume 23, issue 12
Articles | Volume 23, issue 12
https://doi.org/10.5194/bg-23-4227-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-4227-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 12
Research article
 | 
26 Jun 2026
Research article |  | 26 Jun 2026

Macroalgal influence on particulate organic matter sources and early transformation in an Arctic fjord

Ashok S. Jagtap, Archana Singh, Anand Jain, Nandini Raj, and Manish Tiwari

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Short summary
Rapid Arctic warming is driving the expansion of coastal macroalgal forests, yet the role of their organic carbon in Arctic biogeochemistry remain largely unexplored. Here, isotopic, bulk, biochemical, and biomolecular analyses of surface particulate organic matter reveal that labile macroalgal carbon is a major contributor and is laterally transported with selective degradation. Continued expansion of macroalgal forests will enhance their role in Arctic carbon cycling and ecosystem functioning.
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