Siberut

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Siberut
Geography
Location	South East Asia
Coordinates	1°23′S, 98°54′E
Archipelago	Mentawai Islands
Area	4,030 km²
Administration
Indonesia
Province	West Sumatra
Regency	Mentawai Islands
Demographics
Population	30-35,000 (as of 2001)
Density	7.5/km²/km²
Indigenous people	Mentawai. 10% of the population are from other parts of Indonesia.

Mentawai Islands Location

Siberut is the largest and northernmost of the Mentawai Islands, lying 150 Kilometres west of Sumatra in the Indian Ocean. A part of Indonesia, the island is the most important home for the Mentawai people.^{[citation needed]} The western half of the island was set aside as the Siberut National Park in 1993. Much of the island is covered with rainforest, but is subject to commercial logging.

Smaller islands adjacent to Siberut include Karamajet and Masokut which lie in the Bungalaut strait at the south of the island.

The island is known for its range of primates, including the Kloss Gibbon (Hylobates klossii), pig-tailed langur (Simias concolor), Mentawai Langur (Presbytis potenziani) and Mentawai Macaque (Macaca pagensis). The primates are ritualistically hunted by the Mentawai men and eaten by the people, as evidenced by the scores of macaque skulls dangling inside tribal outposts and dwellings. The primates are hunted with arrows pre-soaked in a paralyzing poison, having been derived from plants found in abundance throughout the sago lowlands.

Siberut was affected by the 2004 Indian Ocean earthquake tsunami, but without any known loss of human life. One report stated that the island may have been raised up to two metres by the earthquake.

1 Geography
- 1.1 Biodiversity
- 1.2 Environment
2 Further reading

[edit] Geography

Siberut Island has a hot and humid equatorial climate, with an annual rainfall of 4,000 mm. Temperatures range from 22 to 31 °C, and humidity averages 81-85%. The east coast has many islets, bays and coral reefs, and is covered with mangrove forest extending up to 2 km wide before giving way to nipah forest. The west coast features mainly Barringtonia forests and is difficult to get to because of rough seas and steep cliffs. The hilly interior elevates to 384 metres, with many streams eventually forming rivers in the sago-grove lowlands and swamp forests. There are also areas of dipterocarp primary forest.

[edit] Biodiversity

Siberut has been isolated from the mainland Sunda shelf since the Mid-Pleistocene. This isolation has led to a much biodiversity, with about 900 species of vascular plants and 31 mammal species. Sixty-five percent of mammals and fifteen percent of other animals are endemic at some taxonomic level, making Siberut unique. Of the 134 bird species found on Siberut, 19 are endemic at some taxonomic level.

[edit] Environment

Siberut was recognised as a Biosphere Reserve in 1981. In 1993, the western part of the island was designated as a National Park, covering an area of 1,905 km².

About 70% of the remaining forest outside the reserve is subject to logging concessions, some operative and others pending.

In 2001 UNESCO brought in a new phase of its Siberut Programme, with the intention of protecting the ecosystem through local development. This phase involves creating a partnership of local communities, conservation groups and local government, an approach which appears to be popular locally.

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