Cellular costs underpin micronutrient limitation in phytoplankton



McCain, J Scott P, Tagliabue, Alessandro, Susko, Edward, Achterberg, Eric P, Allen, Andrew E and Bertrand, Erin M
(2021) Cellular costs underpin micronutrient limitation in phytoplankton. SCIENCE ADVANCES, 7 (32). eabg6501-.

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Abstract

Micronutrients control phytoplankton growth in the ocean, influencing carbon export and fisheries. It is currently unclear how micronutrient scarcity affects cellular processes and how interdependence across micronutrients arises. We show that proximate causes of micronutrient growth limitation and interdependence are governed by cumulative cellular costs of acquiring and using micronutrients. Using a mechanistic proteomic allocation model of a polar diatom focused on iron and manganese, we demonstrate how cellular processes fundamentally underpin micronutrient limitation, and how they interact and compensate for each other to shape cellular elemental stoichiometry and resource interdependence. We coupled our model with metaproteomic and environmental data, yielding an approach for estimating biogeochemical metrics, including taxon-specific growth rates. Our results show that cumulative cellular costs govern how environmental conditions modify phytoplankton growth.

Item Type: Article
Uncontrolled Keywords: 3107 Microbiology, 3708 Oceanography, 31 Biological Sciences, 37 Earth Sciences
Divisions: Faculty of Science and Engineering > School of Environmental Sciences
Depositing User: Symplectic Admin
Date Deposited: 11 Nov 2021 15:46
Last Modified: 20 Jun 2024 17:52
DOI: 10.1126/sciadv.abg6501
Open Access URL: https://www.science.org/doi/10.1126/sciadv.abg6501
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3143057