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| Iselin Bank | |
|---|---|
| Name | Iselin Bank |
| Type | Seamount/Bank |
| Location | Southern Indian Ocean / Southern Ocean |
Iselin Bank is an undersea bank located off the continental margin in the Southern Ocean near the Kerguelen Plateau and adjacent to the Antarctic Convergence. The feature is a bathymetric high that influences regional circulation, biogeography, and fisheries, and has attracted research from oceanographic institutions and national polar programs. Its position links it to broader Southern Ocean processes, seafloor geomorphology, and ecological hotspots studied by international programs.
Iselin Bank lies on the continental shelf or rise sector associated with the Kerguelen Plateau, the Southern Ocean, and the sub-Antarctic islands region including proximity to Heard Island and McDonald Islands and the Crozet Islands. The bank is sited near the path of the Antarctic Circumpolar Current and close to the Polar Front, which shapes water mass boundaries and regional climate patterns examined by the Intergovernmental Panel on Climate Change and oceanographic expeditions from institutions such as the Woods Hole Oceanographic Institution, the Scripps Institution of Oceanography, and national programs from France, Australia, and India. Charts produced by the International Hydrographic Organization and surveys by research vessels from the United States and France have mapped the bathymetry that defines the bank’s extent.
The bank’s substrate reflects tectonic and volcanic history related to the Kerguelen Hotspot, the breakup events linked to the fragments of Gondwana, and mantle plume activity that also produced the Kerguelen Plateau and nearby volcanic edifices. Sediment drifts and contourite deposits on and around the bank record influences from the Antarctic Circumpolar Current and from episodic glaciation events tied to the Pleistocene and Quaternary. Oceanographic features such as eddies, upwelling zones, and internal waves around the bank are of interest to researchers at the National Oceanic and Atmospheric Administration, the British Antarctic Survey, and the Commonwealth Scientific and Industrial Research Organisation. Geophysical surveys employing multibeam echosounders, seismic reflection profiling, and gravity measurements have been carried out by vessels operated by the USGS, IFREMER, and the GEOMAR Helmholtz Centre for Ocean Research Kiel.
Iselin Bank supports biological communities characteristic of sub-Antarctic banks, where enhanced productivity attracts plankton, krill, and higher trophic levels including seabird breeding populations from islands such as Macquarie Island and South Georgia and the South Sandwich Islands, as well as marine mammals like Antarctic fur seal, southern elephant seal, blue whale, and southern right whale. Pelagic and demersal fish assemblages associated with banks include species similar to those studied in the Patagonian Shelf and around the Kerguelen Islands, with ecological links to Antarctic krill and mesopelagic faunas surveyed by teams from NIWA and the Australian Antarctic Division. Benthic habitats on the bank host sessile invertebrates comparable to communities recorded by the Census of Marine Life, including filter feeders and sponge assemblages documented by expeditions organized by the Monterey Bay Aquarium Research Institute and university research groups.
The bank was charted during hydrographic and scientific cruises conducted in the 20th century by national expeditions from France, United Kingdom, and United States research fleets. Historical mapping efforts by the Royal Navy and by oceanographic expeditions such as those aboard RV Discovery and later research vessels contributed to its inclusion on nautical charts maintained by the International Hydrographic Organization. The feature’s name reflects the practice of naming seafloor features after scientists, ships, or institutions involved in exploration; naming conventions are governed by bodies such as the General Bathymetric Chart of the Oceans and the Advisory Committee on Undersea Features.
Research activity on and around the bank has included multidisciplinary surveys by oceanographers, geologists, and biologists from organizations including the SCAR-affiliated programs, the International Ocean Discovery Program, and national polar institutes like the Alfred Wegener Institute. Studies have utilized platforms such as research vessels, remotely operated vehicles deployed by institutions such as WHOI and JAMSTEC, and autonomous sensors contributed by the Global Ocean Observing System. Human uses are constrained by remoteness, but the area is of interest for fisheries management linked to regulatory bodies such as the Commission for the Conservation of Antarctic Marine Living Resources and for climate-related monitoring conducted by the European Space Agency and satellite programs like Copernicus.
Conservation measures affecting seabed features in the Southern Ocean are informed by international agreements and management bodies including the Convention on the Conservation of Antarctic Marine Living Resources, the Antarctic Treaty System, and regional measures adopted by the Commission for the Conservation of Antarctic Marine Living Resources. Scientific assessments by entities like the IUCN and policy advice from the Scientific Committee on Antarctic Research inform area-based management, vulnerability assessments, and possible protective measures such as marine protected areas modeled after those around South Georgia and the South Sandwich Islands and the Ross Sea Region. Ongoing surveillance, compliance, and research partnerships among nations including France, Australia, New Zealand, and Chile support efforts to balance science, conservation, and the limited human uses of remote submarine banks.
Category:Undersea banks of the Southern Ocean Category:Kerguelen Plateau region