Where is the seagrass located?

They are mainly found in bays, estuaries and coastal waters from the mid-intertidal (shallow) region down to depths of 50 or 60 metres. Most species are found in shallow inshore areas. Seagrasses inhabit all types of ground (substrates), from mud to rock.

What is seagrass mapping?

Project Seagrass, an environmental charity, has launched an online platform that crowdsources imagery and location information in a centralized database. This information will help countries that have a lot of seagrass, but not a lot of data, to improve efforts to protect the rapidly receding underwater plants.

Where is seagrass most abundant?

Although seagrass occur throughout the coastal waters of Florida, they are most abundant from Tarpon Springs northward to Apalachee Bay. Seagrass also occur in protected bays and lagoons as well as along the continental shelf in the Gulf of Mexico.

Where is Posidonia located?

Posidonia is a genus of flowering plants. It contains nine species of marine plants (“seagrass”), found in the seas of the Mediterranean and around the south coast of Australia.

Does seagrass need sunlight?

Although more closely related to lilies than to terrestrial grasses, like most of their distant grass kin, seagrasses require plenty of sunlight. Seagrasses cannot use these suspended nutrients very efficiently, but tiny algae called phytoplankton can.

How do you monitor seagrass?


  1. Take a Photograph of the quadrat.
  2. Describe sediment composition.
  3. Describe other features and ID/count of macrofauna.
  4. Estimate seagrass percent cover.
  5. Estimate seagrass species composition.
  6. Measure canopy height.
  7. Estimate algae percent cover.
  8. Estimate epiphyte percent cover.

Who eats Johnson’s seagrass?

Large herbivores, like the green sea turtle and Florida manatee, frequently feed on Johnson’s seagrass leaves.

How does seagrass survive?

Seagrasses have evolved adaptations to survive in marine environments including salt tolerance and resistance to the energy of waves (rhizomes and roots firmly anchor seagrasses to the sediments and flexible blades offer little resistance to water movement.

Where does Posidonia Oceanica grow?

Mediterranean Sea
Why Posidonia is important? Posidonia oceanica is endemic to the Mediterranean Sea and the most widespread seagrass species in these waters. It covers between 25,000 and 50,000 km2 of the coastal areas, corresponding to 25% of the sea bottom at the depth between 0 and 40 m.

At what depth does seagrass grow?

around 4 metres
Seagrass is dependent on high levels of light for photosynthesis to grow and can therefore only be found in shallow water to a depth of around 4 metres.

Where are the seagrasses on the Florida coast?

Seagrasses cover nearly 2.5 million acres of shallow sediments near Florida’s coastline and in its estuaries and bays. An additional 2 million acres likely exist offshore in deeper waters in the Big Bend region and off the southwest Florida coast.

What are the reports of seagrass integrated mapping and monitoring?

The statewide report is the second produced by the SIMM program to provide scientists, resource managers, legislators, and other stakeholders a summary of the status of Florida seagrasses. Chapters reporting on seagrasses in Florida estuaries and coastal waters are revised and uploaded on an as-needed basis as new information becomes available.

Why are seagrass beds important to marine life?

Many economically important fish and shellfish species depend on seagrass beds for critical stages of their life history. Seagrasses provide food and shelter for endangered mammals and turtles and play a role in nutrient cycles, sediment stabilization, coastal biodiversity, and the global carbon cycle.