The litter composed of dead leaves left by P. oceanica is home to some 115 invertebrate species. It is therefore both a habitat and a major food source for all ecosystems on the Mediterranean coast.
Many pollutants present in our oceans are permanently contaminating marine mammals. In order to establish the extent of this exposure and the challenges it represents, a group of researchers have adopted complex and varied approaches to the problem.
The Black Sea's habitable volume has decreased by more than 40 % in 60 years. And the oxygen penetration depth in the water column has shrunk from 140 to 90 metres, compressing a rich ecosystem.
The observation of a high concentration of methane off the north coast has enabled scientists to take a fascinating trip back in time. The study also makes a contribution to a better understanding of the cycle of one of the most reactive greenhouse gases.
The concentration of ethane in the atmosphere has begun increasing again since 2009. This reversal has also been accompanied by a significant surplus of methane, a well-known greenhouse gas. The exploitation of shale gas is the primary cause of this trend.