The Bay of Bengal is home to these collections of islands. There are 572 islands in the Andaman and Nicobar Islands. Barren Island, India's only active volcano, is located here. The Nicobar Islands are home to Indira Point, India's southernmost point. The Andaman Islands are divided into two archipelagos or island groups: the Great Andaman and Ritchie's Archipelago. This article will explain to you about the Island Groups of Bay of Bengal which will be helpful in Geography preparation for the UPSC Civil service exam.

Andaman and Nicobar Islands

• The Andaman and Nicobar Islands are located in the Bay of Bengal to the southeast of the mainland.
• They are larger, more numerous, and dispersed islands. These islands are thought to represent a section of mountains produced by tectonic action.
• These islands are near the equator and receive a lot of rain since it rains every day.
• They also have a lot of forest cover. Summers and winters in this region have similar average temperatures.
• This group of islands has a large variety of flora and fauna. So far, the islands have a diverse range of vegetation and forest creatures.
• Trading through ports is possible in the coastal region and the island group. As a result, the country's diverse physical features are extremely strategic.
• Barren Island, India's lone volcano, is located in the Andaman and Nicobar Islands. It's a raging volcano.
• The Narcondam and Barren islands, both volcanic in nature, are situated here. The former appears to be extinct, whilst the latter is still alive and well.
• On Baratang Island, there is also a mud volcano.
• These mud volcanoes have erupted infrequently in the past, with recent eruptions in 2005 thought to be linked to the 2004 Indian Ocean earthquake.
• The most recent big eruption was on February 18, 2003. This mud volcano is known as Jalki by the locals.
• Beaches, mangrove streams, limestone caverns, and mud volcanoes are just a few of the physical characteristics of this island.

Andaman and Nicobar Islands

Andaman Island

• The Andaman Islands are made up of around 300 islands.
• The principal islands, collectively known as Great Andaman, are Landfall Island, the Sentinel Islands, Ritchie's Archipelago, and Rutland Island.
• The Ten Degree Channel, which is roughly 90 miles (145 kilometers) wide, separates Little Andaman from the Nicobar Islands in the south.
• The Andamanese, a group of indigenous people that encompasses a variety of tribes such as the Jarawa and Sentinelese, call the Andaman Islands home.
• While some of the islands may be visited with a permission, others, such as North Sentinel Island, are off-limits to visitors.
• Visitors are often unfriendly to the Sentinelese, who have had little contact with anybody else.
• Mostly damp deciduous woods cover the Middle Andamans. The moist evergreen variety dominates in the North Andamans, with abundance of woody climbers.
• The Andaman Islands' native vegetation is tropical forest with mangroves along the coast. The rainforests are comparable to those on Burma's west coast in terms of composition.

Nicobar Island

• The Nicobar Islands are made up of 19 islands. Car Nicobar is located in the north, Camorta, Katchall, and Nancowry are located in the middle, and Great Nicobar is located in the south.
• The westernmost extremity of Sumatra, Indonesia, is about 90 miles southwest of Great Nicobar.
• The Nicobar Islands are part of a large island arc formed by the Indo-Australian Plate colliding with Eurasia.
• The collision raised the Himalayas and most of Indonesia's islands, forming a broad arc of highlands and islands that includes Burma's Arakan Yoma range, the Andaman and Nicobar islands, and the islands off Sumatra's west coast, such as the Banyak and Mentawai Islands.
• The Nicobar Islands' vegetation is traditionally split into two types: coastal mangrove forests and interior tropical and subtropical wet broadleaf forests, both of which are evergreen and deciduous.
• Inland meadows may also be found on numerous islands, albeit these are likely to have developed from human intervention.

Narcondam Island

• Narcondam is a tiny volcanic island in the northern Andaman Sea that is India's easternmost island.
• The island's highest point, at 710 meters above sea level, is made of andesite. The island is part of the Indian union territory of Andaman and Nicobar Islands, and it is part of the Andaman Islands.
• It's considered a dormant volcano.
• The island is mostly covered in forest. The island was created by a volcano that had not been known to be active in previous years.
• The Andaman and Nicobar Islands' easternmost point is Narcondam Island.

Barren Island

• Barren Island is a small island in the Andaman Islands off the coast of India. Barren Island is South Asia's only confirmed active volcano.
• It is the only active volcano in India.
• The island is located in the Andaman Sea, some 140 kilometers northeast of Port Blair, the Union Territory's headquarters.
• It is part of the Andaman and Nicobar archipelago of islands. Visitors with prior authorization are welcome to visit the deserted 3-km-wide island.
• The island's volcano, the sole active volcano in a series of volcanoes stretching from Sumatra, Indonesia, to Myanmar, in the north, had been dormant for nearly 150 years before resuming activity in 1991.

Andaman and Nicobar Islands - Flora Diversity

• The tropical rainforest canopy of the Andaman and Nicobar Islands is made up of components from Indian, Myanmar, Malaysian, and unique floral strains.
• Epiphytic vegetation, chiefly ferns and orchids, thrives in the South Andaman woods.
• The Middle Andamans are largely covered with humid deciduous woods.
• The moist evergreen variety dominates in the North Andamans, with abundance of woody climbers.
• The North Nicobar Islands have no evergreen woods, but evergreen forests constitute the dominating vegetation in the Nicobar group's center and southern islands.

Andaman and Nicobar Islands - Faunal Diversity

• The Narcondam hornbill, Nicobar megapode (a ground-nesting bird), Nicobar treeshrew (a tiny mole-like mammal), Long-tailed Nicobar monkey, and the Andaman day gecko are all endemic faunal species found solely on the A&N Islands and nowhere else.
• The IUCN (International Union for Conservation of Nature) Red List of Threatened Species classifies the Dugong (sea cow) and the Indo-Pacific humpback dolphin as Vulnerable among the marine fauna present on the islands.
• The marine faunal variety of the islands' environment, which includes coral reefs and their accompanying fauna, is another distinguishing trait.
• The island ecology has around 500 species of scleractinian corals (hard or stony corals) that are protected under Schedule I of the Wildlife Protection Act of 1972.

Andaman and Nicobar Islands - Climatic Conditions

• The Andaman and Nicobar Islands have a tropical climate that is mitigated by sea breezes.
• The southwest monsoon, which blows from May to September, and tropical cyclones, which follow in October and November, provide over 3,000 mm of rain to the area each year.
• Great Nicobar receives far more rain than the other Nicobar Islands.

Andaman and Nicobar Islands - Population

• Hundreds of islands make up the Andaman and Nicobar Islands area, although only a few are inhabited.
• Only 12 of the Nicobar Islands are populated, while over two dozen of the Andaman Islands have human settlements.
• Immigrants from South Asia and their descendants make up the great bulk of the Andamans' population.
• The majority of people speak Hindi or Bengali, but Tamil, Telugu, and Malayalam are also widely spoken.
• The Andamanese, the indigenous people of the Andaman Islands, used to be tiny, isolated communities that spoke several varieties of the Andamanese language.
• The Nicobarese (including the related Shompen) remained to make up the bulk of the Nicobars' population in the early twenty-first century.
• They are believed to be descended from the Malays of insular and peninsular Southeast Asia, as well as the Mon (also known as the Talaing) of Myanmar.

Andaman and Nicobar Islands - Significance

• At the confluence of the Bay of Bengal and the Andaman Sea, the Andaman and Nicobar Islands are located.
• It is a collection of 572 islands that straddles some of the world's busiest trade routes.
• The Andaman and Nicobar Islands are located about 450 nautical miles north-south near to the western entrance to the Malacca Strait, which is a key Indian Ocean chokepoint.
• The Andaman and Nicobar Islands (A&N) are a key center for India's economic strategic cooperation.
• Under the Act East Policy, the significance of the Andaman and Nicobar Islands in India's strong relations with East Asian nations and other sea-related countries is crucial, and it is projected to develop.
• The Blue Economy of the island, which includes fisheries, aquaculture, and seaweed farming, will increase in tandem with the development of modern infrastructure in Andaman and Nicobar.

Conclusion

The union territory of India's Andaman and Nicobar Islands consists of two groupings of islands along the southeastern fringe of the Bay of Bengal. The Andaman and Nicobar Command, the Indian Armed Forces' sole tri-service geographical command, is based on the islands. The Sentinelese people, an uncontacted tribe, live in the Andaman Islands. The Sentinelese may be the only people alive today who have not progressed beyond Palaeolithic technology.