Genomic signatures suggesting adaptation to ocean acidification in a coral holobiont from volcanic CO(2) seeps
Ocean acidification, caused by anthropogenic CO(2) emissions, is predicted to have major consequences for reef-building corals, jeopardizing the scaffolding of the most biodiverse marine habitats. However, whether corals can adapt to ocean acidification and how remains unclear. We addressed these qu...
| Published in: | Communications Biology |
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| Main Authors: | , , |
| Format: | Text |
| Language: | English |
| Published: |
Nature Publishing Group UK
2023
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| Subjects: | |
| Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10363134/ http://www.ncbi.nlm.nih.gov/pubmed/37481685 https://doi.org/10.1038/s42003-023-05103-7 |
| Summary: | Ocean acidification, caused by anthropogenic CO(2) emissions, is predicted to have major consequences for reef-building corals, jeopardizing the scaffolding of the most biodiverse marine habitats. However, whether corals can adapt to ocean acidification and how remains unclear. We addressed these questions by re-examining transcriptome and genome data of Acropora millepora coral holobionts from volcanic CO(2) seeps with end-of-century pH levels. We show that adaptation to ocean acidification is a wholistic process involving the three main compartments of the coral holobiont. We identified 441 coral host candidate adaptive genes involved in calcification, response to acidification, and symbiosis; population genetic differentiation in dinoflagellate photosymbionts; and consistent transcriptional microbiome activity despite microbial community shifts. Coral holobionts from natural analogues to future ocean conditions harbor beneficial genetic variants with far-reaching rapid adaptation potential. In the face of climate change, these populations require immediate conservation strategies as they could become key to coral reef survival. |
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