Standard Presentation (12 minutes) Australian Marine Sciences Association 2025 Conference

Natural recovery of corals after severe disturbance (120347)

Juliano Morais 1
  1. James Cook University, Townsville, QUEENSLAND, Australia

Ecosystem recovery from human-induced disturbances, whether through natural processes or restoration, is occurring worldwide. Yet, recovery dynamics, and their implications for broader ecosystem management, remain unclear. We explored recovery dynamics using coral reefs as a case study. We tracked the fate of 809 individual coral recruits that settled after a severe bleaching event at Lizard Island, Great Barrier Reef. Recruited Acropora corals, first detected in 2020, grew to coral cover levels that were equivalent to global average coral cover within just two years. Furthermore, we found that just 11.5 Acropora recruits per square meter were sufficient to reach this cover within two years. However, wave exposure, growth form, and colony density had a marked effect on recovery rates. Our results underscore the importance of considering natural recovery in management and restoration, and highlight how lessons learnt from reef recovery can inform our understanding of recovery dynamics in high-diversity climate-disturbed ecosystems.