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Majchrzyk et al., 2023

Different times, similar mechanism? Convergent patterns in light-induced phenotypic plasticity in Devonian and modern corals

Majchrzyk, A., Jakubowicz, M., Bongaerts, P., Zapalski, M. K.
DOI
DOI10.1007/s00338-023-02394-4
Year2023
JournalCoral Reefs
Volume42
Number4
Pages893-903
Typearticle in journal
LanguageEnglish
Id47437

Abstract

Modern scleractinian corals can display high phenotypic plasticity, which reflects an interplay among various environmental controls, such as sediment input, water hydrodynamics or light intensity. In particular, the latter can strongly influence the morphology of coral species living across broad depth gradients. Light intensity was also a factor shaping the colonies of extinct Palaeozoic tabulate corals (Anthozoa: Tabulata). Based on gradual transitions in morphology observed in corals from the Middle Devonian (Givetian stage, ~ 385 Ma) mesophotic coral ecosystems (MCE) of the Aferdou el Mrakib reef (Anti-Atlas mountains , Morocco) and comparative material originating from different palaeobathymetric and biogeographical settings, we show that Devonian tabulate corals, such as Roseoporella and Alveolites, were characterised by high phenotypic plasticity and the ability to dramatically change their morphology depending on the inferred light conditions. Such a mechanism is similar to that observed in modern scleractin-ians, e.g. Porites sillimaniana. This recurring morphological theme suggests that Palaeozoic tabulate corals shared many functional characteristics of modern scleractinians.

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