Banc d'Arguin (Mauritania) – Location, History, Facts

Banc d'Arguin is a coastal sandbank system and protected national park on the Atlantic coast of Mauritania, recognized for its marine and avian biodiversity.

Banc d'Arguin, Mauritania.

Country: Mauritania
Coordinates: 20.2347° N, 16.1089° W

Banc d'Arguin overview

Banc d'Arguin is a coastal sandbank system and protected national park on the Atlantic coast of Mauritania, recognized for its marine and avian biodiversity. The area encompasses roughly 12,000 square kilometers of shallow offshore waters, tidal flats, and barrier islands. It is significant as a major staging and feeding ground for migratory shorebirds and as a center for traditional coastal fisheries and coastal ecosystem research.

Banc d'Arguin coordinates

Banc d'Arguin is commonly mapped at approximately 20.2347° N, 16.1089° W, or 20.2347, -16.1089 in decimal degrees.

Degrees: 20.2347° N, 16.1089° W

Decimal: 20.2347, -16.1089

Where Banc d'Arguin is located

Banc d'Arguin lies off Mauritania’s central Atlantic shoreline, positioned north of Nouakchott and south of Nouadhibou, facing the eastern North Atlantic. The feature occupies the continental shelf adjacent to the Sahara coastal plain, with approximate central coordinates near 20.5°N latitude and 16.5°W longitude. The site includes a chain of sandbanks, mudflats, and small islands that extend seaward from the coastline and adjoin coastal dunes and salt flats onshore.

Why Banc d'Arguin is important

Banc d'Arguin matters principally for its ecological productivity and role in the East Atlantic Flyway for migratory birds, supporting internationally significant populations of waders and waterfowl. The site also sustains important seagrass meadows and productive coastal fisheries that underpin local livelihoods. Scientific studies have used Banc d'Arguin to examine coastal upwelling, nutrient-rich waters, and bird migration ecology. Culturally, the area is distinct for its long-standing fishing traditions that adapt to the local tidal and sandbank environment.

History of Banc d'Arguin

The Arguin bank and its islands formed through coastal sediment deposition influenced by Atlantic currents and wind-driven sand transport over millennia. European contact began in the fifteenth century when Portuguese navigators established a presence on Arguin Island, which later changed hands among Dutch, English, and French interests and served as a trading post. In the twentieth century Mauritanian authorities formalized protection for the bank and its associated marine areas, establishing governance and conservation measures that reflected both ecological priorities and local fishing practices.

Natural features of Banc d'Arguin

The Banc d'Arguin complex comprises intertidal mudflats, tidal channels, shallow sandy shoals, and dune-backed islands, underlain by unconsolidated sands and silts on a broad continental shelf. Seagrass beds occur in subtidal areas and provide feeding grounds for fish and invertebrates. Exposed sandbanks shift seasonally with tidal currents, creating a dynamic mosaic of shallow pools and channels. Remnants of colonial-era fortifications and small stone structures survive on some islands, reflecting historical human occupation of the isles.

Environment, protection, and monitoring of Banc d'Arguin

Banc d'Arguin is managed under national protected-area legislation and international designations that recognize its ecological importance, with governance led by Mauritanian authorities in collaboration with research organizations and conservation groups. Conservation themes include protection of migratory bird populations, sustainable fisheries monitoring, and habitat preservation for seagrass and intertidal systems. Long-term stewardship involves periodic biological surveys, community-based resource management by local fishing groups, and scientific monitoring to inform adaptive management measures.

Banc d'Arguin facts

Arguin Island was among the first West African coastal sites visited and intermittently occupied by Portuguese mariners in the fifteenth century.
The Banc d'Arguin complex covers approximately 12,000 square kilometers of marine and coastal habitats on Mauritania’s continental shelf.
A distinct Imraguen fishing culture has traditionally harvested fish and shellfish using shore nets and small boats adapted to sandbank conditions.
The site supports one of the largest concentrations of migratory shorebirds along the East Atlantic Flyway each year.
Banc d'Arguin was inscribed on the UNESCO World Heritage List for its outstanding biodiversity and ecological significance.

← Mauritania