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Big Bend Seagrasses Aquatic Preserve - Management and Protection of Seagrasses Quick Topics

Seagrass beds are one of the most productive habitats found in the world. The rich biodiversity that make up seagrass habitats plays a critical ecological and environmental role to Florida's coastal communities. Seagrasses improve water clarity by stabilizing bottom sediments and absorbing nutrients from the water column. They reduce coastal erosion by helping to diffuse wave energy during storm events. Economically, seagrass beds are of critical importance to Florida's commercial and recreational fisheries. Florida's juvenile fish and invertebrates (redfish, shrimp, bay scallops, seatrout, mullet and stone crabs) depend on these rich nurseries for food and protection. Manatees, wading birds, and sea turtles also utilize these areas for foraging.

Seagrass monitoring

Staff regularly monitor seagrass health

BBSAP is the second largest contiguous area of seagrass habitat in the eastern Gulf of Mexico. Seagrass monitoring is an integral part of mapping the total acreage of Florida's seagrasses. According to FWC’s 2011 Seagrass Integrated Mapping and Monitoring (SIMM) report for the State of Florida, there are approximately 240,000 acres of seagrass coverage in the Big Bend region and 2.5 million acres in Florida’s coastal waters. The five species of seagrass found in BBSAP include Cuban shoal grass, manatee grass, turtle grass, widgeon grass, and star grass. One of the major threats to seagrasses in the state is from prop scarring. Repetitive scouring of prop scars prevents re-colonization of new grass and often requires restoration. Another threat to seagrass is nutrient loading from rivers which can decrease water clarity and shade out sunlight that grasses need for photosynthesis. Natural threats, like hurricanes, can cause fragmentation of seagrass beds that can take years to heal.

BBSAP seeks to manage seagrass communities through research and monitoring, education and outreach efforts, continued resource management, and collaborative efforts with other state agencies to effectively protect and maintain this habitat throughout BBSAP.

Monitor the status and trends of seagrass distribution within BBSAP to determine overall health and identify potential threats.

BBSAP is developing and implementing a seagrass monitoring plan that maintains a longterm monitoring project to include water quality indicators, percent coverage of seagrass and algae species, density, epiphyte load, and sediment depths. Staff use GPS to visit the same locations semi-annually to assess the health of the seagrass beds at those locations. By visiting enough locations, researchers can get a snapshot of the health of the seagrass community as a whole. Hyperspectral imagery and GIS technology can be used to identify severely scarred areas, quantify overall gains or losses to seagrass acreage, and extrapolate the health of those locations to a broader area.

BBSAP will continue to collaborate with FWC and other state agencies to produce a resource for seagrass monitoring, mapping, and data sharing. This includes partnering with other resource managers to conduct clean-up efforts to address derelict vessels and/or illegal fisheries gear that can impact seagrass habitat.

Promote the importance of seagrass habitats by generating a variety of informational outlets that target user groups in BBSAP.

BBSAP provides the public with information about the importance of seagrass habitats and how they can help protect them through brochures, kiosks and signs at boat ramps and marinas, and participation at education and outreach events throughout the Big Bend, such as the Cedar Key Seafood Festival.



Last updated: November 24, 2015

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