On January 14, the Sanibel-Captiva Conservation Foundation (SCCF) reported increasing concentrations of Karenia brevis, the organism responsible for red tide, along the Southwest Florida coast. This uptick is affecting local wildlife and coastal ecosystems on Sanibel and Captiva.
Red Tide Concentrations
Data from the Florida Fish and Wildlife Conservation Commission indicates the presence of K. brevis at varying levels in Lee County, with:
- Medium concentrations recorded offshore of Sanibel and at Alison Hagerup Beach Park on Captiva.
- Background, very low, and low concentrations detected in other areas.
Wildlife Impacts
The SCCF noted multiple reports of wildlife affected by red tide, including:
- Stranded fish species such as mullet, catfish, crabs, and eels.
- Two deceased black scoters found onshore.
While the exact cause of death for affected wildlife is challenging to confirm without individual examination, the close proximity of K. brevis blooms suggests a correlation.
How Red Tide Affects Wildlife
K. brevis releases neurotoxins called brevetoxins that attack the nervous systems of animals. These toxins can be fatal to fish, birds, sea turtles, and marine mammals and can also impact humans.
- Even when cell counts are low or background-level, wildlife may suffer from brevetoxicosis by foraging in areas where blooms are active.
- Toxins can accumulate in prey and plants, impacting larger animals like cormorants and sea turtles.
Current Red Tide Bloom
As of January 14:
- Satellite imagery detected a bloom patch located southwest of Sanibel and offshore of Naples, approximately 15-20 miles out.
- Impacts are most likely during south and westerly winds, which can transport the bloom onshore.
Dr. Eric Milbrandt, SCCF Marine Lab Director, explained:
“While there is an uptick in strandings, the largest detectable patch remains offshore. Wind and currents can change the distribution of the bloom daily.”
What You Can Do
- Report Impacts:
If you notice fish kills, deceased wildlife, or experience respiratory issues related to red tide, email sccf@sccf.org with details, including location, date, and photos. - Report Erratic Wildlife Behavior:
For animals unable to stand or fly, displaying tremors or weakness, contact CROW (Clinic for the Rehabilitation of Wildlife) at 239-472-3644, ext. 222.
Human Health Risks
According to the National Centers for Coastal Ocean Science, water samples collected from January 6-13 detected K. brevis at levels that may cause respiratory irritation in Charlotte, Lee, Manatee, Monroe, Pinellas, and Sarasota counties.
Ongoing Monitoring and Advocacy
The SCCF continues to monitor the situation and provide updates. Using its water quality reports, the organization advocates for strategies to support the health of coastal ecosystems and communities.
Stay informed, and if you experience any red tide-related impacts, report them promptly to aid conservation efforts.
Key Safety Messages
As more walkers, cyclists, and e-bike users take advantage of the path network, SPD officers and police aides are patrolling the pathways to provide safety tips and answer questions. Among their key messages:
- E-Bike Rules: Only Class 1 e-bikes are permitted on the Shared Use Path.
- Engagement: Officers encourage path users to stop and say hello, ask questions, and learn more about safely navigating the system.
“Our officers and police aides are happy to chat about the path system and answer any questions,” the SPD stated. “We look forward to seeing you out there. Enjoy your journey along Sanibel’s Shared Use Path.”
Resources for Path Users
For additional resources, including safety tips, maps, and details about e-bike regulations, visit the city’s Bike or Hike page at Sanibel Bike or Hike.
Whether you’re exploring the island on foot or bike, remember to follow the rules, respect fellow path users, and enjoy the stunning scenery Sanibel has to offer. Stay safe and happy exploring!
