Planktonic foraminifera regulate calcification according to ocean density
Zarkogiannis, Stergios D. (University of Oxford)
Rae, James W.B. (University of St. Andrews)
Shipley, Benjamin R. (University of Oxford)
Mortyn, P. Graham (Universitat Autònoma de Barcelona. Departament de Geografia)

Data:	2025
Descripció:	12 pàg.
Resum:	Planktonic foraminifera are key contributors to the oceanic carbon cycle. In pelagic environments, carbonate production by planktonic biomineralizers regulates ocean-atmosphere carbon dioxide exchange and exports surface carbon to the deep ocean. Here we compare shell traits of three planktonic foraminifera species from the central Atlantic with a suite of environmental parameters to discern the factors underlying their variations. Our analysis revealed that calcification in foraminifera is associated with seawater density and depends on species habitat depth, whereas foraminifera bulk shell densities may serve as a seawater density proxy, regardless of species. We observe that their shell weights increased with habitat depth, enabling the living cells to adjust their overall density to match that of the surrounding liquid. This suggests that calcification in nonmotile organisms has a buoyancy regulatory function and will respond to the anthropogenically driven reductions in ocean density (oceanic rarefication), with potential consequences for the carbon cycle.
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Publicat a:	Communications earth & environment, Vol. 6 Núm. 1 (2025) , p. 605, ISSN 2662-4435

DOI: 10.1038/s43247-025-02558-w
PMID: 40757048

12 p, 5.2 MB

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