A scientific program of the 1 OCEAN Foundation to understand and preserve animal forests.
August 2022. After a particularly hot summer, amateur divers are warning of a major gorgonian sea fan die-off in the Mediterranean. In some places, populations have been completely decimated between 0 and 30 meters depth. In response, the 1 OCEAN Foundation and UNESCO decided to launch a major scientific exploration program. The aim: to understand how deep-sea gorgonians and their ecosystems could survive.
Les gorgones rouges (Paramuricea clavata) sont des animaux endémiques et emblématiques de la Méditerranée. Elles sont de proches parents des coraux de récifs mais à leur différence, elles peuvent vivre à de grandes profondeurs, on peut en effet les retrouver jusqu’à 100 mètres de profondeur. A la manière d’arbres sous-marins, les gorgones forment de véritables forêts animales. Leur structure en trois dimensions confère à ces organismes sessiles un rôle de garde-manger, de nurserie et d’habitat protecteur dont dépendent de nombreuses espèces.
An Alarming Observation
During the summer of 2022, gorgonians in the western Mediterranean basin experienced a massive mortality episode linked to abnormally high temperatures. At certain sites, the results were alarming: between 0 and 30 meters below the surface, almost all the gorgonians died in just a few days. If we are to believe
these thermal disturbances are set to become increasingly frequent. In the short term, Mediterranean gorgonian populations could be seriously threatened, and with them the entire associated ecosystem.
"The mortality of gorgonians is probably the last alarm signal concerning the ecological crisis we are going through"
Lorenzo BRAMANTI, CNRS Research Fellow - LECOB.
"The situation of the gorgonians in the Mediterranean is the image of what is happening on our planet. Like the Amazonian forest, the underwater animal forests are disappearing little by little, with consequences just as dramatic. For thousands of living beings, these forests are both a protective habitat and a food source and their disappearance inevitably leads to a loss of biodiversity." - Alexis ROSENFELD, Explorer and photographer for the 1 OCEAN missions.
Faced with the ecological emergency, a scientific exploration program
In response to the ecological emergency, UNESCO and the 1 OCEAN Foundation have launched a scientific exploration program in partnership with the CNRS and the LECOB research unit at the Observatoire Océanologique de Banyuls-sur-Mer: "The Noah's Ark of the deep, a future for biodiversity?" Indeed, beyond a certain depth, the gorgonians seem preserved, as if they had been protected in a thermal capsule. For scientists, this finding is a real source of hope: less impacted by temperature anomalies, the depths could become veritable climatic refuges for animal forests.
Launched in October 2022, this two-year program will involve four European countries (France, Italy, Monaco and Spain), with Lorenzo BRAMANTI, a specialist in animal forests, as Scientific Director. The program will be based in particular on Mediterranean shipwrecks, which are formidable natural laboratories for the study of animal forests. To assist the researchers, Lily, the 1 OCEAN Foundation's underwater drone, is tasked with collecting data at depth and taking samples for genetic analysis. The aim will be to define whether deep-sea habitats can host demographically self-sufficient animal forests and thus become the ultimate biological safe haven.
This mission was carried out with the support of our partners.
Would you like to join us?
