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Video footage courtesy of Biscayne Bay Aquatic Preserve
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Seagrass is the underwater flowering plants that live in protected bays,
lagoons, and other shallow coastal waters. This grass-like vegetation forms small
patchy beds that can develop into expansive meadows. These seagrass meadows may
take many decades to form. There are seven different seagrass species that provide
essential ecological functions.
Seagrass is one of the most productive natural communities in the world and is a
principal contributor to the marine food web. Thousands of plants and animals live
among the seagrass in a complex and fragile society. Sea turtles and manatees graze
upon seagrass. Many types of shrimps, crabs, worms, snails, and small fish spend
their entire lives within seagrass meadows. In fact,
marine recreational fish depend upon seagrass communities at some time in their
lives. Larger fish and seabirds even visit seagrass meadows to eat these smaller
animals.
Seagrass also improves water quality by stabilizing loose sediment and filtering
some pollutants out of the water. Without seagrass, many areas would be a seascape
of unstable shifting sand and mud.
Why is Seagrass important?
- Economically, millions of acres of seagrass supports
both commercial and recreational fisheries that provide a wealth of benefits to
the economy.
- Florida’s Department of Environmental Protection (FDEP) reported that in 2000, Florida’s
seagrass communities supported commercial harvests of fish and shellfish valued
at over 124 billion dollars. Adding the economic value of the nutrient cycling function
of seagrasses, and the value of recreational fisheries to this number, FDEP has
estimated that each acre of seagrass has an economic value of approximately
$20,500 per year, which translates into a statewide economic benefit of 55.4 billion
dollars annually.
- Provides protective nurseries for many endangered species
- Provides food sources for many endangered species
- Increases Water Quality
- Decreases sedimentation float that destroys coral reefs in nearby areas
- Reduces wave energy on the coastline
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