Posidonia, keystone of the Mediterranean marine biodiversity

Strictly protected at the French, European and International levels, posidonia seagrass have decreased by 10%

in a century.

Why is Posidonia so important? Because it plays a primary role for :

• Providing nursery and feeding areas for fish,

• Water purification,

• Coastal protection against erosion,

• The fight against global warming

Boat mooring is responsible for physical damage to posidonia seagrass, with boat anchors causing irreversible

damages. The larger the ship, the heavier the anchor and the longer the chain. The impacts on the seabed are

therefore likely to be stronger by large vessels.

In response to this, Andromède Océanologie created DONIA® in 2013, in partnership with the Rhône Méditerranée

Corse Water Agency. It is an application for navigation and anchoring assistance outside fragile ecosystems

such as seagrass beds (posidonia, cymodocea, eelgrass) and coralligenous reefs. Free for download on the Android

and Apple stores, it allows any yachtsman, fisherman, diver or yacht captain to position themselves in relation to the

nature of the seabeds and to anchor outside the seagrass beds, in accordance with the law. In fact, Posidonia oceanica enjoys legal protection in many Mediterranean countries, including France. We invite you to consult the website https://donia.fr/ for more informations.

For more informations on environmentally friendly anchorage, please also visit the Interregional Mediterranean Sea (DIRM MED) webpage : http://www.dirm.mediterranee.developpement-durable.gouv.fr/ecological-mooring-organisation-a2885.html