Biogeosciences
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Articles | Volume 23, issue 3
Articles | Volume 23, issue 3
https://doi.org/10.5194/bg-23-923-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-923-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 3
Research article
 | 
02 Feb 2026
Research article |  | 02 Feb 2026

Proteomic and biogeochemical perspectives on cyanobacteria nutrient acquisition – Part 2: quantitative contributions of cyanobacterial alkaline phosphatases to bulk enzymatic rates in the subtropical North Atlantic

Noelle A. Held, Korinna Kunde, Clare E. Davis, Neil J. Wyatt, Elizabeth L. Mann, E. Malcolm S. Woodward, Matthew McIlvin, Alessandro Tagliabue, Benjamin S. Twining, Claire Mahaffey, Mak A. Saito, and Maeve C. Lohan

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Short summary
Microbial enzymes are critical to marine biogeochemical cycles, but which microbes are producing those enzymes? We used a targeted proteomics method to quantify how much Prochlorococcus and Synechococcus contribute to surface ocean alkaline phosphatase activity. We find that alkaline phosphatase abundance is limited by the availability of iron, zinc and cobalt (which may substitute for zinc).
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