Home Science Alarm as seawater heats up off Florida Keys, imperiling reef

Alarm as seawater heats up off Florida Keys, imperiling reef

A French grunt fish swims around a coral reef in Key West, Florida on July 13, 2023.

The soaring temperatures of the seawater off the coast of Florida are posing a serious threat to the world’s third-largest barrier reef. In response, scientists are taking action by removing samples of coral from ocean nurseries and transferring them to controlled land-based tanks to provide a cooler environment. This measure aims to safeguard the coral and prevent mass die-offs of marine organisms such as fish and sea turtles. The increasing surface water temperatures, which exceeded 90 degrees Fahrenheit earlier this month and reached a record-breaking 101.1F in Manatee Bay, are far beyond the range that coral can withstand.

Alex Neufeld, the projects coordinator with the Coral Restoration Foundation, expressed concern about the severity of the situation, stating that it has the potential to be the worst crisis the Florida Keys has ever faced. To protect the coral from the dangerous water conditions, Neufeld’s nonprofit group, along with other local organizations, is collecting genetic strains of coral from nurseries and relocating them to land-based facilities where the water parameters can be controlled. This move aims to ensure the survival of the reef-based sea life.

The impact of the rising seawater temperatures extends beyond marine ecosystems. It also threatens the tourism industry in the Florida Keys, which heavily relies on the attraction of the barrier reef. Fishermen and tourists who visit the region to enjoy activities such as fishing for lobster are deeply saddened by the visible damage to the coral reefs. They fear that the decline of the reef’s health will deter visitors and adversely affect local businesses. The economic value of Florida’s coral reefs is substantial, generating $2 billion in revenue and providing numerous jobs.

The bleaching of the reefs, characterized by the coral turning white due to severe stress, appears to be happening at an accelerated pace this year. Coral reefs play a crucial role in protecting coastal areas from storms and hurricanes, making their preservation vital not only for marine life but also for human communities.

French grunt fish and a longspine squirrelfish swim around a coral reef in Key West, Florida
French grunt fish and a longspine squirrelfish swim around a coral reef in Key West, Florida.

Brian Branigan, a 65-year-old boat captain who rents launches to tourists from Big Pine Key, expressed his deep concern over the warming of the waters. He described the devastating impact he witnessed while snorkeling in Looe Key National Marine Sanctuary, where he observed bleached coral reefs. Sport fishermen, a significant segment of the tourism industry in the Keys, may reconsider visiting the area if the decline of the coral reefs continues.

The efforts of scientists to gather coral samples from nurseries and relocate them to controlled environments demonstrate the crucial importance of preserving the reef. By protecting the coral, scientists aim to ensure the survival of marine life and indirectly safeguard coastal communities from the devastating effects of storms and rising sea levels. However, the potential negative impact on businesses and the local economy remains a concern.

The protection of Florida’s coral reefs is not only an environmental necessity but also crucial for maintaining the economic stability and natural beauty of the region. The increasing seawater temperatures highlight the urgent need for action to mitigate the effects of climate change and preserve these invaluable ecosystems.

© 2023 AFP

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Alarm as seawater heats up off Florida Keys, imperiling reef (2023, July 29)
retrieved 29 July 2023
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