Fish and Wildlife Foundation of Florida
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Photo Credit: Bekah Nelson

Restoring Our Reefs

Coral reefs are central to the health and diversity of our oceans. For 25% of marine life, this ecosystem is home. But disruption of reef biodiversity can trigger a loss of the reef as a whole.

Although coral reefs represent only one percent of ocean habitats, they serve as home, protection, and spawning grounds for a fourth of all marine life. Reefs regulate carbon dioxide levels in the water and prevent shoreline erosion by mitigating the effects of offshore currents and hurricanes. Florida possesses the third-largest reef system in the world. The reefs on which many fish populations depend are in severe decline. This is particularly true in the Florida Keys.

“Coral bleaching,” triggered by high water temperatures, has caused significant reef damage in Florida. When water is too warm, corals expel the algae (zooxanthellae) living in their tissues, causing coral to turn completely white. Corals are under considerable stress and subject to high mortality if bleaching events occur too frequently or other significant threats are present. Unfortunately for Florida’s reefs, other threats are present.

High salinity levels in the Florida Bay, caused by the diminished flow of freshwater to the Everglades, threatens many of the species of coral comprising the Florida Keys reef system. Water pollution, sedimentation and careless boating and diving that physically damage reefs can be locally problematic. Reefs can also be damaged or destroyed by hurricanes.

The intentional or accidental release of two species of lionfish (genus Pterois) into local waters over the past 30 years is causing further harm to Florida’s reefs and fisheries. Large lionfish populations now exist in the Caribbean, western Atlantic, and Gulf of Mexico. Native to the Indian Ocean and the Pacific, lionfish have no known significant local predators. With its formidable venomous spinal tissue, sit-and-wait ambush tendencies, and the ability to consume prey more than half of its length, the lionfish is quite the intimidating predator to smaller fish and invertebrates, many of which are important to keeping reefs clear of algae.

Corals, when stressed, also become susceptible to disease. A previously unknown coral disease appeared in the upper Keys in 2014 and has since spread south, appearing in the lower Keys for the first time in April 2018 – more bad news for a reef that has lost half of its coral over the last two centuries.

Our Foundation is committed to long-term restoration of Florida’s reefs. We work with FWC, The National Fish and Wildlife Foundation, NOAA, and others to combat coral disease, establish long-term monitoring of reef restoration efforts, and identify breakthrough strategies that will substantially reduce lionfish numbers throughout Florida waters, the Gulf of Mexico, and the Caribbean. Click here to support our work with a donation.

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