The Barat Daya Islands ( id, Kepulauan Barat Daya) are a group of

island An island (or isle) is an isolated piece of habitat that is surrounded by a dramatically different habitat, such as water. Very small islands such as emergent land features on atolls can be called islets, skerries, cays or keys. An isla ...

s in the Maluku province of

Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Gui ...

. The Indonesian phrase ''barat daya'' means 'south-west'.

Geography

These islands are located off the eastern end of

East Timor East Timor (), also known as Timor-Leste (), officially the Democratic Republic of Timor-Leste, is an island country in Southeast Asia. It comprises the eastern half of the island of Timor, the exclave of Oecusse on the island's north-w ...

. Wetar is the largest island in the group. To the west, the

Ombai Strait Ombai Strait ( id, Selat Ombai, pt, Estreito de Ombai, tet, Estreitu Ombai) is an international strait in Southeast Asia. It separates the Alor Archipelago from the islands of Wetar, Atauro, and Timor in the Lesser Sunda Islands. The strai ...

separates Wetar from

Alor Island Alor ( id, Pulau Alor) is the largest island in the Alor Archipelago and is one of the 92 officially listed outlying islands of Indonesia. It is located at the eastern Lesser Sunda Islands that runs through southeastern Indonesia, which from ...

, part of

East Nusa Tenggara East Nusa Tenggara ( id, Nusa Tenggara Timur – NTT; pt, Sonda Oriental) is the southernmost province of Indonesia. It comprises the eastern portion of the Lesser Sunda Islands, facing the Indian Ocean in the south and the Flores Sea in the nor ...

. The

Wetar Strait Wetar Strait ( id, Selat Wetar, pt, Estreito de Wetar, tet, Estreitu Wetar) is an international strait in Southeast Asia. It separates the island of Wetar from the eastern part of the island of Timor. The strait is also the eastern portion ...

separates Wetar from

Timor Timor is an island at the southern end of Maritime Southeast Asia, in the north of the Timor Sea. The island is divided between the sovereign states of East Timor on the eastern part and Indonesia on the western part. The Indonesian part, ...

to the south. Even though included in the Indonesian Maluku province political division, the southwestern islands are geographically part of the

Lesser Sunda Islands The Lesser Sunda Islands or nowadays known as Nusa Tenggara Islands ( id, Kepulauan Nusa Tenggara, formerly ) are an archipelago in Maritime Southeast Asia, north of Australia. Together with the Greater Sunda Islands to the west they make up ...

. Rainfall is limited with a dry season between October and December when some of the islands appear as dry savannah. The Barat Daya Islands except Wetar are part of the Banda Sea Islands moist deciduous forests

ecoregion An ecoregion (ecological region) or ecozone (ecological zone) is an ecologically and geographically defined area that is smaller than a bioregion, which in turn is smaller than a biogeographic realm. Ecoregions cover relatively large areas of ...

. Wetar and Timor comprise the

Timor and Wetar deciduous forests The Timor and Wetar deciduous forests is a tropical dry forest ecoregion in Indonesia and East Timor. The ecoregion includes the islands of Timor, Wetar, Rote, Savu, and adjacent smaller islands. Geography Timor, Wetar, Rote, and Savu are pa ...

ecoregion. Most of the islands are barren, infertile and minimally forested. Together with

, Nusa Tenggara,

Sulawesi Sulawesi (), also known as Celebes (), is an island in Indonesia. One of the four Greater Sunda Islands, and the world's eleventh-largest island, it is situated east of Borneo, west of the Maluku Islands, and south of Mindanao and the Sulu ...

, and most of Maluku, the Barat Daya Islands are part of

Wallacea Wallacea is a biogeographical designation for a group of mainly Indonesian islands separated by deep-water straits from the Asian and Australian continental shelves. Wallacea includes Sulawesi, the largest island in the group, as well as ...

, the group of Indonesian islands that are separated by deep water from both the Australian and Asian continental shelves. The islands of Wallacea have never been linked by land to either

Asia Asia (, ) is one of the world's most notable geographical regions, which is either considered a continent in its own right or a subcontinent of Eurasia, which shares the continental landmass of Afro-Eurasia with Africa. Asia covers an are ...

Australia Australia, officially the Commonwealth of Australia, is a sovereign country comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands. With an area of , Australia is the largest country by ...

, and as a result have few mammals and a mix of flora and fauna from both continents.

Islands

Among the islands within the archipelago are (from west to east): * Liran *

Wetar Wetar is a tropical island which belongs to the Indonesian province of Maluku and is the largest island of the Maluku Barat Daya Islands (literally ''Southwest Islands'') of the Maluku Islands. It lies east of the Lesser Sunda Islands, which i ...

* Kisar * Nyata * Romang * Leti Islands (Leti, Moa, Lakor) * Sermata Islands * Damer * Babar Islands

Populated places

* Layoni (Teun Island)

Geology

The islands are part of the Inner Banda Arc, a volcanic

island arc Island arcs are long chains of active volcanoes with intense seismic activity found along convergent tectonic plate boundaries. Most island arcs originate on oceanic crust and have resulted from the descent of the lithosphere into the mantle alon ...

created by the collision of the

Indo-Australian Plate The Indo-Australian Plate is a major tectonic plate that includes the continent of Australia and the surrounding ocean and extends northwest to include the Indian subcontinent and the adjacent waters. It was formed by the fusion of the Indian an ...

and the

Eurasian Plate The Eurasian Plate is a tectonic plate that includes most of the continent of Eurasia (a landmass consisting of the traditional continents of Europe and Asia), with the notable exceptions of the Indian subcontinent, the Arabian subcontinent an ...

. Romang and Damar are volcanic; Wetar consists mostly of oceanic crust that was pushed to the surface by the colliding plates. The Barat Daya and Banda islands constitute an inner arc; the outer arc, which includes Timor, the

Tanimbar Islands The Tanimbar Islands, also called ''Timur Laut'', are a group of about 65 islands in the Maluku province of Indonesia. The largest and most central of the islands is Yamdena; others include Selaru to the southwest of Yamdena, Larat and Ford ...

, and the

Kai Islands The Kai Islands (also Kei Islands) of Indonesia are a group of islands in the southeastern part of the Maluku Islands, located in the province of Maluku. The Moluccas have been known as the Spice Islands due to regionally specific plants such ...

, is mostly made up of oceanic crust lifted up by the collision, and wraps around south and east of the inner arc.

History

Unlike much of the rest of the Maluku Islands, the Barat Daya Islands did not participate in the inter-island trade over the centuries. Damar was the region's only island to have produced spice. Too remote from the centre of the Malukan spice trade, the Dutch destroyed the nutmeg trees on Babar. Bugis and Makarassarese annually sailed to coral-rich Luang to purchase reef products such as trepang and mother of pearl.

Administration

The Maluku Barat Daya Regency is administratively composed of seventeen

districts A district is a type of administrative division that, in some countries, is managed by the local government. Across the world, areas known as "districts" vary greatly in size, spanning regions or counties, several municipalities, subdivisions ...

(''kecamatan''), whose areas (in km²) and 2013 officially estimated populations are listed below.:Biro Pusat Statistik, Jakarta, 2015.

References

{{authority control Volcanoes of the Maluku Islands Archipelagoes of Indonesia Landforms of Maluku (province) Inner Banda Arc Islands of the Maluku Islands