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| Marine regions of North America | |
|---|---|
| Name | Marine regions of North America |
| Countries | United States, Canada, Mexico, Cuba, Bahamas, Bermuda |
Marine regions of North America provide a framework for describing the coastal, shelf, slope, and open-ocean areas adjacent to the North America continent, spanning the Arctic Ocean, Atlantic Ocean, and Pacific Ocean margins and including inland seas such as the Gulf of Mexico and Caribbean Sea. Definitions combine legal boundaries like the United Nations Convention on the Law of the Sea with ecological delineations used by organizations such as the National Oceanic and Atmospheric Administration, the Department of Fisheries and Oceans (Canada), and the International Hydrographic Organization.
Geographic and legal definitions derive from instruments and institutions including the United Nations Convention on the Law of the Sea, the Convention on Biological Diversity, the North American Free Trade Agreement era protocols, and regional bodies like the International Maritime Organization and the Commission for Environmental Cooperation. Scientific frameworks use classifications from the Marine Ecoregions of the World (MEOW), the Large Marine Ecosystems (LME) program, and assessments by the Intergovernmental Panel on Climate Change, the National Research Council (United States), and the Pew Charitable Trusts. Jurisdictional zones—territorial seas, exclusive economic zones, and continental shelves—are adjudicated through cases at the International Court of Justice and negotiations involving states such as United States, Canada, Mexico, Cuba, Bahamas, and Dominican Republic.
North American marine regions are commonly divided into Arctic, Atlantic, Gulf of Mexico–Caribbean, and Pacific realms. Arctic boundaries involve the Beaufort Sea, Chukchi Sea, Barents Sea (in broader circumpolar work), and the Northwest Passage routes adjacent to Greenland and Nunavut. Atlantic divisions reference the Labrador Sea, Gulf of Saint Lawrence, Georges Bank, and the Sargasso Sea corridor near Bermuda. Gulf–Caribbean divisions include the Gulf of Mexico, Yucatan Channel, Florida Straits, and the Caribbean Sea bordering Cuba, Jamaica, and Hispaniola. Pacific divisions include the Bering Sea, Gulf of Alaska, the California Current margin from British Columbia to Baja California, and offshore island chains like the Aleutian Islands, Channel Islands (California), and the Revillagigedo Islands.
Major ecosystems correspond to LMEs and ecoregions such as the Arctic Basin LME, Northwest Atlantic LME, Gulf of Mexico LME, and California Current LME. Coastal habitats include estuaries like the Chesapeake Bay, St. Lawrence River Estuary, and San Francisco Bay; shelf seas such as the Grand Banks and Jeffrey's Ledge; and pelagic systems including the North Atlantic Oscillation-influenced gyres and the North Pacific Gyre. Coral reef systems are centered on the Mesoamerican Barrier Reef System, Florida Reef Tract, and Caribbean reef complexes near Belize Barrier Reef Reserve System and Flower Garden Banks National Marine Sanctuary.
Large-scale circulation and climate drivers include the Gulf Stream, Labrador Current, California Current, Alaska Current, and the Antarctic Circumpolar Current in broader contexts; teleconnections involve the El Niño–Southern Oscillation, the North Atlantic Oscillation, and the Pacific Decadal Oscillation. Polar processes feature sea ice dynamics, permafrost-influenced runoff from Yukon River and Mackenzie River, and freshwater fluxes into the Beaufort Gyre. Atmospheric forcing from systems like Hurricane Katrina, Hurricane Maria, and historic storms at Galveston, Texas shape sediment transport, storm surge, and coastal change.
Biodiversity hotspots include seagrass meadows in Tampa Bay, mangrove forests along Sinaloa and Florida Everglades margins, kelp forests off British Columbia and California, and cold-water coral communities on the Gulf of Maine and Hanna Shoal. Iconic species and taxa linked to these regions include North Atlantic right whale, Blue whale, Leatherback sea turtle, Atlantic cod, Pacific salmon, Spiny lobster, and reef-building corals such as Acropora palmata. Important bird and marine mammal sites intersect with protected areas like Monomoy National Wildlife Refuge, Point Reyes National Seashore, and Saguenay–St. Lawrence Marine Park.
Commercial and artisanal fisheries target stocks such as Atlantic cod, Gulf menhaden, King crab, and Pacific herring; major ports and processing hubs include New York City, Halifax, Nova Scotia, New Orleans, Los Angeles, and Vancouver, British Columbia. Offshore energy sectors span Gulf of Mexico oil platforms tied to companies like ExxonMobil and Royal Dutch Shell, and expanding offshore wind developments supported by policies in the United States Department of Energy and Mexican Secretariat of Energy. Shipping lanes connect through chokepoints such as the Panama Canal, Strait of Magellan (broader routes), and the Strait of Juan de Fuca, with governance involving the International Maritime Organization and regional pilotage authorities.
Management regimes combine national laws—such as the Magnuson–Stevens Fishery Conservation and Management Act—and international agreements like the Convention on International Trade in Endangered Species of Wild Fauna and Flora and regional fisheries management organizations. Major threats include overfishing exemplified by historical collapses off the Grand Banks; pollution incidents like the Deepwater Horizon oil spill and chronic eutrophication in Chesapeake Bay; invasive species introductions via ballast water from global trade; and climate-driven impacts including ocean warming, acidification, and sea level rise affecting communities from Miami to Prince Rupert, British Columbia. Conservation responses feature marine protected areas such as Papahānaumokuākea Marine National Monument (Pacific-wide comparisons), national marine sanctuaries, cooperative science programs by the World Wildlife Fund and The Nature Conservancy, and transboundary initiatives coordinated through the Commission for Environmental Cooperation.
Category:Marine regions