In 2024, Palau removed invasive rats from Ulong Island; one year later, fish biomass rose 183% and leaf nitrogen increased about 80% at one reef site

A new study from Ulong Island in Palau has found the first experimental evidence that restoring seabird populations by removing invasive rats can also help nearby coral reefs recover. Within a year, researchers recorded more seabirds, increased nutrient movement from land to sea and higher fish biomass, showing that island restoration can benefit both terrestrial and marine ecosystems.