Environmental drivers of metabolomic profiles within and between cryptic lineages of Montastraea cavernosa, the great star coral

Gallery, D.; Abbott, E. N.; Rose Mann, L.; Huzar, A.; Primov, K. D.; Brown, C. P.; Bryant, P. L.; Sedio, B. E.; Matz, M. V.

doi:10.64898/2026.05.15.725494

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bioRxiv · 10.64898/2026.05.15.725494

Environmental drivers of metabolomic profiles within and between cryptic lineages of Montastraea cavernosa, the great star coral

Gallery, D.·Abbott, E. N.·Rose Mann, L.·Huzar, A.·Primov, K. D.·Brown, C. P.·Bryant, P. L.·Sedio, B. E.·Matz, M. V.

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Abstract

Reef restoration practitioners aim to preserve coral genetic diversity by protecting reefs and cultivating diverse genotypes in coral nurseries. However, cryptic genetic lineages in most corals complicate restoration strategies, as the role of between-lineage genetic divergence remains unclear regarding adaptation. In Montastraea cavernosa, researchers have identified cryptic lineages, some strongly segregated by depth. We conducted a ten-week reciprocal transplantation experiment using two cryptic lineages restricted to shallow water (<10m depth), with one lineage more common on nearshore reefs and the other on offshore reefs. We aimed to quantify lineage-specific responses to the environment that explain the genetic and ecological divergence between the two lineages. Surprisingly, the strongest response was not lineage-specific. Instead, both lineages exhibited strong and similar changes in growth and metabolomic profiles, depending on the transplantation habitat. These results suggest that cryptic lineages employ similar mechanisms of adaptation and acclimatization to environmental challenges, despite their genetic distinction.

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Gallery, D., Abbott, E. N., Rose Mann, L., Huzar, A., Primov, K. D., Brown, C. P., Bryant, P. L., Sedio, B. E., Matz, M. V.. 2026-05-16. Environmental drivers of metabolomic profiles within and between cryptic lineages of Montastraea cavernosa, the great star coral. https://doi.org/10.64898/2026.05.15.725494

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