Articles | Volume 16, issue 18
Biogeosciences, 16, 3621–3635, 2019
https://doi.org/10.5194/bg-16-3621-2019
Biogeosciences, 16, 3621–3635, 2019
https://doi.org/10.5194/bg-16-3621-2019

Research article 24 Sep 2019

Research article | 24 Sep 2019

Isotopic fractionation of carbon during uptake by phytoplankton across the South Atlantic subtropical convergence

Robyn E. Tuerena et al.

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Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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AR: Author's response | RR: Referee report | ED: Editor decision
ED: Reconsider after major revisions (05 Jul 2019) by Christoph Heinze
AR by Anna Wenzel on behalf of the Authors (16 Jul 2019)  Author's response
ED: Referee Nomination & Report Request started (22 Jul 2019) by Christoph Heinze
RR by Anonymous Referee #2 (15 Aug 2019)
ED: Publish subject to technical corrections (23 Aug 2019) by Christoph Heinze
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Short summary
The carbon isotopes in algae can be used to predict food sources and environmental change. We explore how dissolved carbon is taken up by algae in the South Atlantic Ocean and how this affects their carbon isotope signature. We find that cell size controls isotope fractionation. We use our results to investigate how climate change may impact the carbon isotopes in algae. We suggest a shift to smaller algae in this region would decrease the carbon isotope ratio at the base of the food web.
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