Growth rate rather than temperature affects the B∕Ca ratio in the calcareous red alga <italic>Lithothamnion corallioides</italic>
Abstract B/Ca ratio in calcareous marine species is informative of past seawater CO3 2 - concentrations, but scarce data exist on B/Ca in coralline algae. Recent studies suggest influences of temperature and growth rates on B/Ca, the effect of which could be critical for the reconstructions of surface ocean pH and atmospheric p 2. In this paper, we present the first laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) analyses of Mg, Sr, Li, and B in the coralline alga Lithothamnion corallioides Mg/Ca, Li/Ca, Sr/Ca, Mg/Li) and B/Ca in a coralline algal species grown in different basins from across the photic zone (12, 40, 45, and 66 m depth). We tested the B/Ca correlation with temperature proxies and growth rates in order to evaluate their possible effect on B incorporation. Our results suggested a growth rate influence on B/Ca, which was evident in the sample with the lowest growth rate of 0.10 mm yr- 1 - 1 B/Ca was the lowest at 462.8 ± µ mol mol- 1 ± µ mol mol- 1 B/Ca and temperature proxies was found only in the shallowest sample from Morlaix (Atlantic coast of France; 12 m depth), where the amplitude of temperature variation (Δ T) was the highest (8.9 ∘ C). Still, fluctuations in B/Ca did not mirror yearly seasonal temperature oscillations as for Mg/Ca, Li/Ca, and Sr/Ca. We concluded that growth rates, triggered by the different Δ T and light availability across depth, affect the B incorporation in L. corallioides.
- Standort
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Deutsche Nationalbibliothek Frankfurt am Main
- Umfang
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Online-Ressource
- Sprache
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Englisch
- Erschienen in
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Growth rate rather than temperature affects the B∕Ca ratio in the calcareous red alga
Lithothamnion corallioides ; volume:19 ; number:4 ; year:2022 ; pages:1047-1065 ; extent:19
Biogeosciences ; 19, Heft 4 (2022), 1047-1065 (gesamt 19)
- Urheber
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Piazza, Giulia
Bracchi, Valentina A.
Langone, Antonio
Meroni, Agostino N.
Basso, Daniela
- DOI
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10.5194/bg-19-1047-2022
- URN
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urn:nbn:de:101:1-2022022404353426587185
- Rechteinformation
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Letzte Aktualisierung
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15.08.2025, 07:23 MESZ
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Beteiligte
- Piazza, Giulia
- Bracchi, Valentina A.
- Langone, Antonio
- Meroni, Agostino N.
- Basso, Daniela
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