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What is Posidonia?
Posidonia, a marine plant
Posidonia oceanica is not an alga, but a marine flowering plant that lives only in the Mediterranean Sea. It forms meadows, real underwater forests that can be found at depths of up to 40 meters.
What role do banquettes play?
A major role against erosion
The banquettes that form on the beaches from dead Posidonia leaves deposited by the sea support biodiversity and play a major role in limiting beach erosion.
What role do Posidonia meadows play?
An ecosystem on its own
Posidonia meadows offer support, shelter, spawning grounds and nurseries for many species. More than 400 different plant species and several thousand animal species live there
Posidonia : a protected plant
A precious plant
Posidonia rhizomes grow at a rate of only 1-3 cm per year! It is therefore particularly valuable and is why it is protected.