Stumbling upon a new source of underwater caffeine was just an added bonus of a new study examining the impact of chemical compounds that corals release into the seawater.
The study found that the organic chemical compounds produced through metabolism — known as metabolites or exudates — vary significantly by coral species, and that the compounds impact the abundances and compositions of reef microorganisms differently.
This differential release of metabolites from benthic reef organisms is particularly significant in the Caribbean, where coral dominance is shifting from hard stony corals to soft octocorals in response to human-caused stressors such as eutrophication, overfishing and global climate change.