Northeast Canyons and Seamounts Marine National Monument

Northeast Canyons and Seamounts Marine National Monument
Name	Northeast Canyons and Seamounts Marine National Monument
Location	North Atlantic Ocean, off New England, United States
Established	2016
Area	4,913 km2
Governing body	United States Fish and Wildlife Service; National Oceanic and Atmospheric Administration

Northeast Canyons and Seamounts Marine National Monument is a federally designated marine protected area located in the western North Atlantic Ocean, southeast of Cape Cod and northeast of Nantucket. The monument encompasses deepwater submarine canyons and extinct volcanic seamounts, supporting diverse pelagic and benthic communities, and lies within the exclusive economic zone of the United States. It was created by presidential proclamation under the Antiquities Act and is co-managed by federal agencies.

Overview

The monument includes three deepwater canyons—Oceanographer Canyon (often called Oceanographer Canyon in literature), Gilbert Canyon and Lydonia Canyon—and four seamounts—Bear Seamount, Mytilus Seamount, Physalia Seamount and Retriever Seamount—forming a compact protected area in the North Atlantic Ocean. Its boundaries are defined in relation to maritime features such as the Continental Shelf off Massachusetts and sit down-current from the Gulf Stream, receiving influences from the Labrador Current. The site is notable in regional marine spatial planning tied to Mid-Atlantic Fishery Management Council and New England Fishery Management Council jurisdictions.

Geography and geology

Geologically, the seamounts are extinct volcanic edifices associated with the ancient New England hotspot and the basaltic provinces related to the North American Plate and North Atlantic Ocean opening. The canyons incise the continental slope and were shaped by glaciation events such as those associated with the Last Glacial Maximum and Pleistocene processes, producing steep walls, terraces, and sediment channels. Bathymetric mapping by vessels like NOAA Ship Okeanos Explorer and surveys by Woods Hole Oceanographic Institution and Lamont–Doherty Earth Observatory revealed submarine landslides, cold-water coral mounds, and ferromanganese crusts similar to features studied at Hess Seamount and Bear Seamount in broader seamount research.

Ecology and biodiversity

The monument supports a mosaic of habitats—slope canyons, summits, ledges, and abyssal plains—hosting assemblages comparable to those documented at Monterey Bay National Marine Sanctuary, New England Aquarium research collections, and transatlantic studies near Azores seamounts. Cold-water corals such as species in the genera Lophelia and Madrepora form biogenic reefs that shelter demersal fishes including Atlantic wolffish and snowy grouper, and large invertebrates like Giant isopod relatives and deep-sea squid cited in surveys by NOAA Fisheries. Pelagic predators and migratory taxa—Atlantic bluefin tuna, leatherback sea turtle, sperm whale, humpback whale, shortfin mako shark, and blue shark—utilize the monument for foraging along prey-rich upwelling zones influenced by Eddy dynamics and the Gulf Stream meander. Seamount-associated endemic species and chemosynthetic communities documented at sites such as Mid-Atlantic Ridge and Juan de Fuca Ridge provide comparative contexts for endemicity and biogeographic connectivity.

History and designation

Interest in protecting the area grew from scientific expeditions, fisheries interactions, and conservation advocacy involving organizations like Conservation Law Foundation, National Oceanic and Atmospheric Administration, and Natural Resources Defense Council. The monument was proclaimed in 2016 by Barack Obama under the Antiquities Act following outreach including stakeholders from Massachusetts Institute of Technology, Woods Hole Oceanographic Institution, and regional fishing communities represented by New Bedford and Gloucester delegations. The designation drew attention from political figures including members of the United States Congress and elicited litigation and debate involving commercial fishing interests and state authorities, paralleling discussions seen in other protected areas such as Papahānaumokuākea Marine National Monument.

Management and regulations

Management is a cooperative framework led by National Oceanic and Atmospheric Administration and United States Fish and Wildlife Service with input from the Department of the Interior and Department of Commerce. Regulations prohibit extractive activities such as mining and most forms of bottom trawling and restrict oil and gas leasing in similarity to protections applied in Monument designations like Bears Ears National Monument (terrestrial analogy). Permitting for scientific research and limited recreational uses is handled through agency processes modeled on National Marine Sanctuaries Act administration and interagency memoranda with enforcement by NOAA Office of Law Enforcement and the United States Coast Guard.

Research and conservation efforts

Ongoing research programs involve institutions such as Woods Hole Oceanographic Institution, Monterey Bay Aquarium Research Institute, Lamont–Doherty Earth Observatory, Scripps Institution of Oceanography, and University of Massachusetts systems using tools including remotely operated vehicles (ROVs), towed camera arrays, and autonomous underwater vehicles (AUVs) deployed from ships like NOAA Ship Okeanos Explorer and R/V Atlantis. Long-term monitoring targets climate change impacts documented in studies by Intergovernmental Panel on Climate Change, ocean acidification research linked to NOAA Ocean Acidification Program, and biodiversity assessments contributing to IUCN evaluations. Conservation initiatives coordinate with regional bodies such as the New England Fishery Management Council and international efforts exemplified by Convention on Biological Diversity dialogues on high-seas biodiversity.

Recreation and public access

The monument is open to non-extractive recreational activities including sport fishing regulated by Atlantic States Marine Fisheries Commission, whale-watching operations based in ports like Gloucester, Massachusetts and Provincetown, Massachusetts, and chartered deep-sea ecotourism voyages using vessels cleared under NOAA permitting. Recreational scuba diving is limited by depth and access constraints; most public engagement occurs through interpretive exhibits at institutions such as New England Aquarium, educational programs at Woods Hole Oceanographic Institution, and virtual dive archives produced by NOAA Office of Ocean Exploration and Research. Access for research and permitted tourism is coordinated through regional ports including New Bedford, Massachusetts and Hyannis, Massachusetts.

Category:Marine protected areas of the United States Category:Protected areas established in 2016