These satellite images show the evolution of temperature and acidity of sea water in the region of Monastir and around the Kuriat Islands between January and August 2022. We note a definite correlation between these 2 characteristics. The acidity increases if the temperature increases. We can therefore conclude that global warming due to human activities induces a warming of the sea and by the same token an acidification of the waters which is one of the factors of the disappearance of posidonia. 

Our N°3 experience confirms this observation.

These satellite images show an erosion of the coastline of the Kuriat Islands between 2017 and 2023. The causes are multiple but we have identified 2: rise in sea level due to global warming (water dilatation: experiment N° 4), but also alteration of Posidonia meadows (experiment N° 5).

These images show that the salinity of Tunisian waters has decreased over time. This may be due to the rise in sea level, as a result of the expansion of the water (experiment N° 4 ) and the melting of glaciers and ice pack.

However, our research has taught us that posidonia are not very resistant to a significant variation in salinity. This observation shows therefore an additional cause of the disappearance of posidonia in Tunisian waters and more generally in the Mediterranean  sea. For more information, click here.