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| Seamounts of the Mediterranean Sea | |
|---|---|
| Name | Mediterranean Seamounts |
| Caption | Bathymetric map of the Mediterranean basin |
| Location | Mediterranean Sea |
| Type | Submarine volcanoes, tectonic uplifts |
| Age | Mesozoic–Cenozoic |
| Discovered | Historical cartography to modern bathymetry |
Seamounts of the Mediterranean Sea Seamounts in the Mediterranean Sea are underwater mountains formed by volcanic, tectonic and sedimentary processes that shape the Iberian Peninsula margin, the Tyrrhenian Sea, the Ionian Sea, the Aegean Sea and the Levantine Sea. These features occur near prominent plate boundaries and microplates including the African Plate, the Eurasian Plate and the Anatolian Plate, and influence regional circulation patterns linked to the Gibraltar Strait, the Suez Canal and the Bosporus exchanges.
The Mediterranean seamount distribution spans the western Alboran Sea adjacent to the Betic Cordillera, across the central basins of the Balearic Sea and the Tyrrhenian Sea near the Sicily Channel, into the eastern Ionian Sea by Crete and along the Hellenic Arc toward Rhodes and the Dodecanese. Western clusters occur offshore Portugal and Spain near the Gulf of Cádiz, while eastern clusters align with the submarine ridges off Cyprus and the Levantine Basin. Seamounts are concentrated along continental margins such as the Apennines submarine front, the submerged margins of Corsica and Sardinia, and volcanic provinces including the Etna region and the Campi Flegrei. The bathymetric signature of seamounts is evident on charts produced by the General Bathymetric Chart of the Oceans and surveyed by expeditions from institutions like the European Marine Observation and Data Network.
Mediterranean seamounts arise from diverse origins: magmatic seamounts related to arc volcanism in the Hellenic Arc and Aeolian Islands; diapiric features associated with salt tectonics in the Eastern Mediterranean; and tectonic uplifts along transpressional zones like the Alpine orogeny-related faults near the Apennine Mountains. Some seamounts are eroded remnants of paleo-islands tied to the Messinian Salinity Crisis, while others are young volcanic edifices formed during Quaternary unrest documented by researchers at the Istituto Nazionale di Geofisica e Vulcanologia and the National Observatory of Athens. Lithologies include basalts from intraplate volcanism, andesites from arc systems, and carbonate-capped seamounts where reef-building organisms colonized emergent summits during high sea-level stands. Geophysical surveys by the National Oceanography Centre (United Kingdom) and the IFREMER program use seismic reflection, multibeam echosounders, and gravity studies to classify these types.
Among well-studied features are the Emile Baudot Seamount system in the western basin, the Pantelleria Seamount near Sicily, the Eratosthenes Seamount off Cyprus, the Calypso Seamount in the Ionian Sea, and the Gela Basin volcanic rises. The Giants’ Ridge-style seamounts near Malta and the Marsili Seamount in the Tyrrhenian Sea are notable for size and activity recorded by Istituto Nazionale di Geofisica e Vulcanologia teams. The Kolumbo volcano northeast of Santorini and the Santorini caldera complex connect to submarine cones mapped by the Hellenic Centre for Marine Research. Historic explorers such as Charles Lyell and expeditions by the HMS Challenger contributed early observations, while modern campaigns by the NOAA and Eurofleets consortium refined maps.
Seamounts host structured communities including benthic assemblages of cold-water corals such as Lophelia pertusa and gorgonian forests noted by researchers from the University of Barcelona and the University of Naples Federico II. Mobile fauna includes commercially important fishes like European hake and Atlantic bluefin tuna that aggregate on seamount slopes; elasmobranchs including porbeagle shark and spiny dogfish use these features as foraging grounds. Invertebrate assemblages include deep-sea sponges catalogued by the Natural History Museum, London and crustaceans recorded by the Muséum national d'Histoire naturelle (France). Seamount summits support endemic and relict taxa influenced by past climate events such as the Last Glacial Maximum and biogeographic barriers near the Strait of Sicily.
Seamounts modify mesoscale and submesoscale dynamics including vortex shedding, Taylor columns, and upwelling that affect nutrient fluxes in the Liguro-Provençal Basin, the Adriatic Sea and the Cretan Sea. Interactions with water masses such as the Mediterranean Outflow Water, the Levantine Intermediate Water and the Western Mediterranean Intermediate Water produce enhanced primary productivity documented in chlorophyll studies by the Copernicus Marine Service and satellite missions like Sentinel-3. Hydrographic cruises by the Scripps Institution of Oceanography and the Institute of Marine Sciences (Barcelona) have quantified seamount-driven mixing that supports pelagic food webs exploited by fisheries managed under bodies like the General Fisheries Commission for the Mediterranean.
Seamount ecosystems face pressures from bottom trawling documented in assessments by the Food and Agriculture Organization and the Mediterranean Action Plan, hydrocarbon exploration near the Levant Basin by companies operating under national regulators such as the Cyprus Hydrocarbons Company, and emerging threats from deep-sea mining interest promoted at forums of the International Seabed Authority though the Mediterranean is not a contract area. Marine Protected Areas designated under frameworks like the Barcelona Convention and the Natura 2000 network include protections for some seamount-associated habitats, with research and advocacy from NGOs such as WWF and Greenpeace and academic input from the Mediterranean Science Commission (CIESM). Conservation measures emphasize trawl bans, habitat mapping by the Joint Research Centre and monitoring programs supported by the European Commission.
Scientific exploration progressed from hydrographic charts by Ptolemy-era navigators and medieval portolans to systematic seismic campaigns by the HMS Challenger and twentieth-century mapping by the Institut Français de Recherche pour l'Exploitation de la Mer and national hydrographic offices of Spain, Italy, Greece and France. Modern methods include autonomous underwater vehicles deployed by Ifremer, remotely operated vehicles operated by the Monterey Bay Aquarium Research Institute and deep-towed camera sleds used by the University of Southampton. Multidisciplinary projects such as those funded by the Horizon 2020 program and collaborations with the European Marine Biological Resource Centre integrate genetics, isotope geochemistry, and acoustic backscatter to resolve seamount origin, age and ecology. Continuing initiatives by institutions like the International Oceanographic Commission and field programs coordinated by the National Oceanic and Atmospheric Administration ensure ongoing baseline data for management.
Category:Seamounts Category:Mediterranean Sea