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Biohut restoration program in Monaco ports: ten years of urban biodiversity gains

Implementation Date

January 8, 2014

By

Société d’Exploitation des Ports de Monaco (SEPM)

City

Monaco

story image

Description

Since 2014, the Société d’Exploitation des Ports de Monaco (SEPM) incrementally installed 78 Biohuts across Port Hercule, Port de Fontvieille, and the Yacht Club de Monaco, making Monaco’s harbors early pioneers in ecological restoration along the Mediterranean coast. These artificial habitats simulate natural nursery conditions, creating safe havens for juvenile fish in otherwise inhospitable urban marine environments. Since 2016, several phases of ecological monitoring, conducted in collaboration with the RESPIRE network, have tracked the evolution of biodiversity. The results are compelling: numerous species have returned to the port waters, including rare and protected ones such as the brown grouper (Epinephelus marginatus) and bushy-tentacled blenny (Hypleurochilus bananensis). The project also established a standardised system to assess habitat use, fish population recovery, and long-term ecosystem trends.

Impact & Result

With an annual maintenance cost of €18,000, Monaco’s Biohut project has enhanced the port’s image and tourism appeal while supporting environmental leadership. Hosting 14 juvenile fish species and 93 mobile fauna species, the Biohuts have been validated for restoring nursery habitats and boosting biodiversity in urban marine zones. Ongoing studies explore links between biodiversity and port-based economic activities.

As a partner since 2014, we are proud to have been the first ports on the Mediterranean coast to commit to reclaiming biodiversity, through the NAPPEX ecological enhancement and restoration program. Ten years later, the installation of 78 Biohuts illustrates the strong and constant commitment of SEPM, since the beginning of its concession, to the sustainable preservation of natural heritage and marine biodiversity.

Jean-Christophe Soler, Environment-Safety Officer at Société d’Exploitation des Ports de Monaco (SEPM)

Solution Spotlight

The Biohut is an artificial habitat that allows to restore the ecological function of nursery, originally provided by shallow rocky or sandy bottoms, when they have been impacted and degraded by coastal constructions (ports, marinas, outfall at sea, etc.). The design of the Biohut comes from observation and understanding of the ecological functions provided by natural nursery areas. Biohut provides a complex natural substrates that is colonized by rich fauna and flora, that is the food resource of juvenile fish, and a physical shelter where predators are not able to reach juvenile fish. The Biohut, by its size and facility of installation, is easy to install, even at big scale, in ports, marinas, or on all kind of infrastructures, and it is also a perfect support to raise public awareness about marine biodiversity protection.

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