Three Brothers, Chagos

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Seabirds nesting on South Brother island in the Three Brothers group Seabirds nesting on South Brother island in the Chagos Archipelago.jpg
Seabirds nesting on South Brother island in the Three Brothers group

The Three Brothers are a group of three small coral islands 20 kilometres (12 miles) east of Eagle Islands along the central western rim of the Great Chagos Bank, which is the world's largest coral atoll structure, located in the Chagos Archipelago.

Contents

Islands

The individual islands are, from north-west to south-east:

History

Discovered by the Portuguese, by Vasco da Gama, the islands were known as Bassas de Chagos. In 1975 during the Joint Services Expedition to Danger Island (JSDI), the expedition members were taken by RFA Resurgent to Eagle Islands, then by ketch and inflatable craft to Danger Island, and then to Three Brothers. The expedition made a topographical survey of the coral reefs, an ecological survey of the Pangus corals on it, and a study on the metabolism of the reef. [1] A reference collection of samples of the flora and fauna of the area was also undertaken. [2] Small, rocky Resurgent Island emerged after the naming of the Three Brothers, and was named after the RFA Resurgent, which supported the 1975 Danger Island scientific research expedition to the area.

Since 1998 the islands are part of the Chagos Archipelago Strict Nature Reserve, and it is forbidden to land on the islands or anchor a boat nearby. The islands have large populations of nesting seabirds. [3]

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<span class="mw-page-title-main">Chagos Archipelago</span> Archipelago in the Indian Ocean

The Chagos Archipelago or Chagos Islands is a group of seven atolls comprising more than 60 islands in the Indian Ocean about 500 kilometres (310 mi) south of the Maldives archipelago. This chain of islands is the southernmost archipelago of the Chagos–Laccadive Ridge, a long submarine mountain range in the Indian Ocean. In its north are the Salomon Islands, Nelsons Island and Peros Banhos; towards its south-west are the Three Brothers, Eagle Islands, Egmont Islands and Danger Island; southeast of these is Diego Garcia, by far the largest island. All are low-lying atolls, save for a few extremely small instances, set around lagoons.

Peros Banhos, Pedro dos Banhos or Baixos de Pêro dos Banhos in old maps, is a formerly inhabited atoll in the Chagos Archipelago of the British Indian Ocean Territory, also claimed by Mauritius.

<span class="mw-page-title-main">Geography of the British Indian Ocean Territory</span>

The British Indian Ocean Territory (BIOT) is an archipelago of 55 islands in the Indian Ocean, located south of India. It is situated approximately halfway between Africa and Indonesia. The islands form a semicircular group with an open sea towards the east. The largest, Diego Garcia, is located at the southern extreme end. It measures 60 square kilometres (23 sq mi) and accounts for almost three-quarters of the total land area of the territory. Diego Garcia is the only inhabited island and is home to the joint UK-US naval support facility. Other islands within the archipelago include Danger Island, Three Brothers Islands, Nelson Island, and Peros Banhos, as well as the island groups of the Egmont Islands, Eagle Islands, and the Salomon Islands.

<span class="mw-page-title-main">Eagle Islands</span>

Eagle Islands is a group of two islands in the Chagos Archipelago. They are located on the central-western rim of the Great Chagos Bank, which is the world's largest coral atoll structure.

<span class="mw-page-title-main">Danger Island, Great Chagos Bank</span>

Danger Island is the westernmost and the southernmost island of the Great Chagos Bank, which is the world's largest coral atoll structure, located in the Chagos Archipelago in the Indian Ocean.

<span class="mw-page-title-main">Egmont Islands</span>

Egmont Islands is an uninhabited atoll administered by the United Kingdom. They are one of the few emerged coral atolls that make up the Chagos Archipelago, British Indian Ocean Territory.

Nelsons Island or Nelson Island or Isle Legour is a small uninhabited island in the Great Chagos Bank, of the Chagos Archipelago in the Indian Ocean. As a protected nature reserve, access to the island is strictly restricted.

<span class="mw-page-title-main">Blenheim Reef</span>

Blenheim Reef is a partly submerged atoll structure in the Chagos Archipelago, Indian Ocean. It includes the coral reef of Baxio Predassa in its southeastern rim, plus another completely submerged part. It is located in the northeastern part of the Chagos Archipelago. It measures almost eleven kilometres (north–south) by more than four kilometres (east–west), with a total area of 36.8 square kilometres, including the lagoon of 8.5 km2, the difference being accounted for the mostly by the reef flat. Only on the eastern side, there are a few sand cays above the water. The largest of them is East Island, which is not quite 200 metres long and 70 metres wide. The other islands in the group are North, Middle and South. Only a few grasses grow on the island. The lagoon is up to 18 metres deep and encumbered with rock. The fringing coral reef has a wide passage in the southwest. The closest land is Takamaka Island in the Salomon Islands Atoll, about 20 kilometres to the southwest.

<span class="mw-page-title-main">Great Chagos Bank</span>

The Great Chagos Bank, in the Chagos Archipelago, about 500 km (310 mi) south of Maldives, is the largest atoll structure in the world, with a total area of 12,642 km2 (4,881 sq mi). The atoll is administered by the United Kingdom through the British Indian Ocean Territory (BIOT).

<span class="mw-page-title-main">Benares Shoals</span> Submerged coral reef of the Chagos Archipelago

Benares Shoals, or Benares Shoal, is a submerged coral reef, an isolated patch located at 5°15′S071°40′E, just 6 kilometres (3.7 mi) west-northwest of Île Pierre, the closest island of Peros Banhos atoll in the northern Chagos Archipelago. It measures about 3 kilometres (2 mi) east–west, with a width of about 700 metres (2,300 ft) and an area of 2 square kilometres (0.77 sq mi). The least depth at the western end is 4.5 metres (15 ft).

Victory Bank is a wholly submerged atoll structure in the Northern Chagos Archipelago at 5°33′S72°14′E. It is located 17 kilometres NNW of Nelson Island, the only island on the northern rim of the Great Chagos Bank. Île Boddam, of the Salomon Islands, lies 17 kilometres to the north.

<span class="mw-page-title-main">Sea Cow Island</span> British Indian Ocean Territory

Sea Cow Island, also known as Île Vache Marine, is a round 18 ha island on the Great Chagos Bank atoll of the Chagos Archipelago in the British Indian Ocean Territory.

<span class="mw-page-title-main">North Brother (Chagos Bank)</span>

North Brother, also known as Île du Nord, is a round 6 ha coral island on the Great Chagos Bank atoll of the Chagos Archipelago in the British Indian Ocean Territory. It is one of the three islands in the Three Brothers group on the western side of the atoll, and forms part of the Chagos Archipelago strict nature reserve. It has been identified as an Important Bird Area by BirdLife International because of its significance as a breeding site for 20,000 seabirds, notably Audubon's shearwaters of which 420 pairs were recorded in a 2004 survey.

<span class="mw-page-title-main">Middle Brother (Chagos Bank)</span>

Middle Brother, also known as Île du Milieu, is an 8-hectare coral island on the Great Chagos Bank atoll of the Chagos Archipelago in the British Indian Ocean Territory. It is one of the three islands in the Three Brothers group on the western side of the atoll, and forms part of the Chagos Archipelago strict nature reserve. It has been identified as an Important Bird Area by BirdLife International for its significance as a breeding site for seabirds, notably sooty terns, of which 12,500 pair were recorded in a 2004 survey.

<span class="mw-page-title-main">South Brother (Chagos Bank)</span> Coral island

South Brother, also known as Île du Sud, is a 23 ha coral island on the Great Chagos Bank atoll of the Chagos Archipelago in the British Indian Ocean Territory. It is one of the three islands in the Three Brothers group on the western side of the atoll, and forms part of the Chagos Archipelago strict nature reserve. It has been identified as an Important Bird Area by BirdLife International because of its significance as a breeding site for seabirds, including brown noddies and lesser noddies.

<span class="mw-page-title-main">Chagos Marine Protected Area</span>

The Chagos Marine Protected Area, located in the central Indian Ocean in the British Indian Ocean Territory of the United Kingdom, is one of the world's largest officially designated marine protected areas, and one of the largest protected areas of any type on Earth. It was established by the British government on 1 April 2010 as a massive, contiguous, marine reserve, it encompasses 640,000 square kilometres (250,000 sq mi) of ocean waters, including roughly 70 small islands and seven atolls of the Chagos Archipelago. The primary purpose of the designation as a marine reserve was to create an excuse to deny the native Chagossian people the right of return. Unlike true marine reserves, the area is heavily polluted by the nearby military base, which is exempt from all restrictions imposed on the area.

References

  1. Baldwin, EA (ed.) (1975), A report on the Joint Services Expedition to Danger Island in the central Indian Ocean, December 1974 to April 1975 Ministry of Defence Publication, London
  2. Chagos Islands coral collections
  3. 6: British Indian Ocean Territory

06°09′S71°31′E / 6.150°S 71.517°E / -6.150; 71.517 (Three Brothers)