Connection and protection boost health in coral reefs

by the University of Oxford
December 11, 2025

Coral reefs may seem like paradise, but they are being degraded by a range of global and local factors, including climate change, poor water quality, and overfishing. New research reveals that connections between reefs help stabilise reef health, reducing the risk of collapse, and that a dual approach – improving conditions on both land and sea – may be the best way to protect these crucial ecosystems. The study was a collaboration between the University of Oxford, the University of Toronto, the National Research Council of Italy, and the Wildlife Conservation Society (WCS).

By developing a mathematical model of a network of coral reefs in Fiji, researchers simulated future reef conditions when managed in three different ways: reducing fishing pressure (increasing herbivore grazing), reducing environmental run-off (decreasing coral mortality), and the two interventions combined. Addressing these two local pressures is a focus as many reefs in Fiji are climate refugia with reduced impacts from global warming and coral bleaching, and show natural recovery to acute events like cyclones. When considering local pressures, reducing the combination of fishing and pollution provided the best outcomes for reefs, showing the value of coordinated actions on land and in the ocean. Importantly, this result was robust to uncertainty in important reef conditions, indicating that it may be relevant for real-world decision-making in reef systems in Fiji and beyond.

Keep reading: https://www.biology.ox.ac.uk/article/connection-and-protection-boost-health-in-coral-reefs

Read the Ecological Applications paper: https://esajournals.onlinelibrary.wiley.com/doi/10.1002/eap.70156