Posidonia oceanica, a precious endemic seagrass

Posidonia oceanica, also known as the Neptune grass, is a valuable endemic seagrass species of the Mediterranean Sea.

Posidonia forms seagrass meadows, referred as underwater forests, creating an ecosystem of great beauty and in addition, providing shelter for many species. Posidonia, alias the lungs of the Mediterranean Sea, is also the most important source of oxygen released to coastal waters. By removing a significant amount of carbon dioxide from the atmosphere, it helps alleviate the effects of climate change.

One of the peculiarities of Posidonia is its sensitivity to pollution and therefore it only grows in clean water, making it a good indicator of water quality. Moreover, the seagrass meadows help to maintain the coastlines and effectively protect beaches from erosion. Posidonia takes advantage of the sand to grow while forming a reef and maintaining the dune systems at the same time.

Besides, for years, Posidonia has had medicinal, agricultural, and several other uses. It was used for the relief of leg pain, and respiratory diseases such as bronchitis and sore throat. However, during the past years, the seagrass meadows have declined due to pollution, fishing activities, coastal development, and the anchoring of ships. To solve these problems, some Mediterranean countries have implemented projects for the conservation and protection of Posidonia oceanica. It is essential to save the Posidonia for the preservation of the ecosystem.