A simplified approach for measuring Rubisco carbon isotope fractionation and the first determination in marine haptophyte <i>Gephyrocapsa oceanica</i>

Wijker, Reto S.; Aguiló-Nicolau, Pere; Jaggi, Madalina; Galmés, Jeroni; Stoll, Heather M.

doi:10.5194/bg-23-1591-2026

Articles | Volume 23, issue 4

https://doi.org/10.5194/bg-23-1591-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-23-1591-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 23, issue 4

Research article

|

27 Feb 2026

Research article |

| 27 Feb 2026

A simplified approach for measuring Rubisco carbon isotope fractionation and the first determination in marine haptophyte Gephyrocapsa oceanica

Reto S. Wijker, Pere Aguiló-Nicolau, Madalina Jaggi, Jeroni Galmés, and Heather M. Stoll

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Oct 2025	304	80	22	406
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Jan 2026	184	94	4	282
Feb 2026	148	146	4	298
Mar 2026	414	191	26	631
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Cumulative views and downloads (calculated since 16 Oct 2025)

Month	HTML	PDF	XML	Total
Oct 2025	304	80	22	406
Nov 2025	142	120	26	288
Dec 2025	162	116	26	304
Jan 2026	184	94	4	282
Feb 2026	148	146	4	298
Mar 2026	414	191	26	631
Apr 2026	171	104	11	286
May 2026	167	42	14	223
Jun 2026	24	22	8	54
Jul 2026	134	34	17	185
Aug 2026	48	27	24	99
Sep 2026	62	46	32	140

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Short summary

Photosynthetic organisms leave characteristic carbon isotope fingerprints that help scientists study Earth’s carbon cycle. We developed a simpler laboratory method to measure these isotope effects in Rubisco, the key enzyme fixing CO₂. Applying this approach, we obtained the first measurement for Gephyrocapsa oceanica, a widespread marine alga that plays a major role in ocean carbon cycling.