Glenn Evans and Mark Nease are two divers/boat captains with extensive experience and knowledge about the marine ecosystem of the Florida Keys. Glenn Evans, a seasoned marine biologist, has spent a significant portion of his career studying the changes in the marine ecosystem, with a particular focus on water conditions such as clarity, algae blooms, and visibility. His work has contributed significantly to the understanding of the impact of environmental changes on marine life. On the other hand, Mark Nease, a veteran fisherman and environmental advocate, has spent years on the water, observing firsthand the changes in the marine ecosystem. His experiences, coupled with his passion for conservation, have made him a valuable voice in discussions about the impact of human activities, such as tourism and fishing, on the marine environment.

Scope and Content Note
The interview conducted by Karen DeMaria with Glenn Evans and Mark Nease provides a comprehensive overview of the changes in the marine ecosystem of the Florida Keys. The conversation begins with a discussion about their experiences on the water, including changes in water clarity, algae blooms, and visibility. They also delve into the impact of the Gulf Stream and changes in water conditions over the years. The conversation then shifts to the impact of human activities, specifically tourism and fishing, on the reef ecosystem. They discuss the decline of certain species and the urgent need for conservation efforts. The interview also covers the decline in marine resources and coral coverage in the area, possibly due to overfishing and environmental changes. They discuss the decline in diversity and the impact on the reef ecosystem. The disappearance of sea urchins and the potential impact of shipping lanes on the marine environment are also discussed.