Mapping Sea Urchin Genetics in the Bahamas

As part of our ongoing work in the Bahamas, SOAR is collecting genetic samples of Diadema antillarum to contribute to a Caribbean-wide study focused on understanding population connectivity of this important reef herbivore. This work is being conducted in collaboration with research partners in the Netherlands who are leading the genetic analysis.

This effort involves collecting small tissue samples from individual urchins to analyze genetic similarities between populations across different locations throughout the Caribbean. By comparing genetic markers, researchers can better understand where urchins may be spawning and how their larvae disperse through ocean currents before settling onto reefs. This information helps identify potential source populations and areas that may play an important role in supporting regional recovery of Diadema.

Understanding connectivity between populations is critical for guiding restoration strategies. If certain locations are found to contribute disproportionately to larval supply, these areas may be especially important to protect. Genetic information can also help determine whether local populations are self-sustaining or rely on larval input from other regions, which can influence how restoration efforts are designed and where resources are most effectively invested.

Results from this research may help improve regional coordination of restoration efforts and support development of strategies that strengthen long-term population resilience of this keystone species.