The future of evolutionary diversity in reef corals

Area of Science:

• Marine biology
• Conservation science
• Evolutionary biology

Background:

• Reef-building corals face significant extinction risk due to climate change and human activities.
• Extinction threats are unevenly distributed across coral species, potentially reducing global phylogenetic diversity.
• Regional impacts of coral extinctions on evolutionary diversity are not well understood.

Purpose of the Study:

• To model the impact of projected coral extinctions on evolutionary diversity at a regional scale.
• To identify regions with significant potential losses in evolutionary diversity for conservation prioritization.
• To assess the importance of phylogenetic species variability alongside phylogenetic diversity in conservation planning.

Main Methods:

• Utilized phylogenetic metrics and geographical distribution data of reef coral species.
• Modeled potential extinction impacts on evolutionary diversity across various ecoregions.
• Analyzed losses based on phylogenetic diversity and phylogenetic species variability.

Main Results:

• Projected losses in evolutionary diversity are not concentrated in species-rich areas like the Coral Triangle.
• Regions with fewer coral species may experience disproportionately larger losses of evolutionary diversity.
• Phylogenetic species variability may decline significantly in some areas, even if overall phylogenetic diversity remains high.

Conclusions:

• Integrating evolutionary history into conservation planning is crucial for safeguarding coral reef diversity.
• Conservation efforts should consider regions with high projected losses in phylogenetic species variability.
• Prioritizing conservation in areas with high evolutionary distinctiveness is essential for long-term coral reef resilience.