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The Indomalaya ecozone is one of the eight ecozones that cover the planet's land surface. An ecozone or biogeographic realm is the largest scale biogeographic division of the earth's surface based on the historic and evolutionary distribution patterns It extends across most of South and Southeast Asia and into the southern parts of East Asia.

The Indomalaya Ecozone
The Indomalaya Ecozone

Previously known as the Oriental Region by biogeographers, Indomalaya extends from Afghanistan and Pakistan through the Indian subcontinent and Southeast Asia to lowland southern China, and through Indonesia as far as Java, Bali, and Borneo, east of which lies the Wallace line, the ecozone boundary named after Alfred Russel Wallace which separates Indomalaya from Australasia. Biogeography is the study of the distribution of Biodiversity over Space and Time. Afghanistan /æfˈgænɪstæn/ officially the Islamic Republic of Afghanistan ( Pashto: د افغانستان اسلامي جمهوریت, Pakistan () officially the Islamic Republic of Pakistan, is a country located in South Asia, Southwest Asia, Middle East and This article deals with the geophysical region in Asia For geopolitical treatments see South Asia. China ( Wade-Giles ( Mandarin) Chung¹kuo² is a cultural region, an ancient Civilization, and depending on perspective a National The Republic of Indonesia ( (Republik Indonesia is a Country in Southeast Asia. Java (Jawa is an Island of Indonesia and the site of its Capital city Jakarta. Bali is an Indonesian Island located at, the westernmost of the Lesser Sunda Islands, lying between Java to the west and Lombok to Borneo is the third largest island in the world and is located at the centre of Maritime Southeast Asia. The Wallace Line (or Wallace's Line) is a boundary that separates the zoogeographical regions of Asia and Australia. Alfred Russel Wallace OM, FRS (8 January 1823 &ndash 7 November 1913 was an British naturalist, Explorer, Geographer The Australasian zone is an ecological region that is coincident but not synonymous (by some definitions with the geographic Region of Australasia Indomalaya also includes the Philippines, lowland Taiwan, and Japan's Ryukyu Islands. The Philippines ( Filipino: Pilipinas, officially known as the Republic of the Philippines (fil ''Republika ng Pilipinas'' RP Taiwan ( Taiwanese: Tâi-oân/Tāi-oân (historically 大灣/台員/大員/台圓/大圓/台窩灣 is an Island in East Asia. For a topic outline on this subject see List of basic Japan topics. The Ryukyu Islands, in Japanese called the (literally Southwest Islands are a chain of Japanese islands in the western Pacific Ocean at the eastern limit

Most of Indomalaya was originally covered by forest, mostly tropical and subtropical moist broadleaf forests, with tropical and subtropical dry broadleaf forests predominant in much of India and parts of Southeast Asia. Tropical and subtropical moist broadleaf forests (TSMF also known as tropical moist forests, are a Tropical and Subtropical Forest The tropical and subtropical dry broadleaf forest Biome, also known as tropical dry forest, is located at tropical and subtropical latitudes The tropical moist forests of Indomalaya are dominated by trees of the dipterocarp family (Dipterocarpaceae). Dipterocarpaceae is a family of 17 genera and approximately 500 species of mainly Tropical lowland Rainforest Trees The family name from

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Major ecological regions

The World Wildlife Fund (WWF) divides Indomalaya into three bioregions, which it defines as "geographic clusters of ecoregions that may span several habitat types, but have strong biogeographic affinities, particularly at taxonomic levels higher than the species level (genus, family). "

Indian Subcontinent

The Indian Subcontinent bioregion covers most of India, Pakistan, Bangladesh, Nepal, Bhutan, and Sri Lanka. India, officially the Republic of India (भारत गणराज्य inc-Latn Bhārat Gaṇarājya; see also other Indian languages) is a country Pakistan () officially the Islamic Republic of Pakistan, is a country located in South Asia, Southwest Asia, Middle East and ( Bengali: বাংলাদেশ inc-Latn Bangladesh) officially Nepal (नेपाल) is a Landlocked country in South Asia. The Kingdom of Bhutan (buːˈtɑːn is a Landlocked nation in South Asia. Sri Lanka, officially the Democratic Socialist Republic of Sri Lanka ( Sinhalese:, இலங்கை known as Ceylon before 1972 is an Island The Hindu Kush, Karakoram, Himalaya, and Patkai ranges bound the bioregion on the northwest, north, and northeast; these ranges were formed by the collision of the northward-drifting Indian subcontinent with Asia beginning 45 million years ago. The Hindu Kush is a Mountain range located between Afghanistan and Pakistan. Karakoram is a mountain range spanning the borders between Pakistan, China, and India, located in the regions of Gilgit, Ladakh, and The Patkai or the Purvachal are the hills on India 's eastern border with Myanmar (Burma The Hindu Kush, Karakoram, and Himalaya are a major biogeographic boundary between the subtropical and tropical flora and fauna of the Indian subcontinent and the temperate-climate Palearctic ecozone. The Palearctic or Palaearctic is one of the eight Ecozones dividing the Earth surface

Indochina

The Indochina bioregion includes most of mainland Southeast Asia, including Myanmar, Thailand, Laos, Vietnam, and Cambodia, as well as the subtropical forests of southern China. Burma, officially the Union of Myanmar ( pjìdàunzṵ mjàmmà nàinŋàndɔ̀ is the largest country by geographical area in mainland Southeast Asia. The Kingdom of Thailand (ˈtaɪlænd ราชอาณาจักรไทย, râːtɕʰa-ʔaːnaːtɕɑ̀k-tʰɑj Laos (ˈlɑːoʊs or /ˈlaʊs/ officially the Lao People's Democratic Republic, is a Landlocked country in Southeast Asia, bordered by Burma Vietnam (ˌviːɛtˈnɑːm Việt Nam) officially The Kingdom of Cambodia ( formerly known as Kampuchea (, transliterated: Preăh Réachéanachâkr Kâmpŭchea) is a country in South East China ( Wade-Giles ( Mandarin) Chung¹kuo² is a cultural region, an ancient Civilization, and depending on perspective a National

Sunda shelf and the Philippines

Main article: Sundaland

Malesia is a botanical province which straddles the boundary between Indomalaya and Australasia. Sundaland is a biogeographical region of Southeastern Asia that comprises the Malay Peninsula and the Malay Archipelago islands of Sumatra The Philippine Archipelago is one of the world's great reservoirs of Biodiversity and endemism. Malesia is a biogeographical region straddling the boundary of the Indomalaya and Australasia ecozones Malesia was first identified as a Floristic It includes the Malay Peninsula and the western Indonesian islands (known as Sundaland), the Philippines, the eastern Indonesian islands, and New Guinea. The Malay Peninsula or Thai-Malay Peninsula (Semenanjung Tanah Melayu (คาบสมุทรมลายู is a major Peninsula located in Southeast Sundaland is a biogeographical region of Southeastern Asia that comprises the Malay Peninsula and the Malay Archipelago islands of Sumatra While the Malesia has much in common botanically, the portions east and west of the Wallace Line differ greatly in land animal species; Sundaland shares its fauna with mainland Asia, while the islands east of the Wallace line either lack land mammals, or are home to a land fauna derived from Australia, which includes marsupial mammals and ratite birds. The Wallace Line (or Wallace's Line) is a boundary that separates the zoogeographical regions of Asia and Australia. Marsupials are an Infraclass of Mammals characterized by a distinctive pouch (called the marsupium) in which females carry their young through A ratite is any of a diverse group of large Flightless birds of Gondwanan origin most of them now extinct

History

The flora of Indomalaya blends elements from the ancient supercontinents of Laurasia and Gondwana. Laurasia (lɔˈreɪʃiə lɔˈreɪʒə was a Supercontinent that most recently existed as a part of the split of the Pangaean supercontinent in the late Mesozoic Gondwana (ɡɒnˈdwɑːnə originally Gondwanaland) was a southern Supercontinent that existed about 500 to 200 Ma ago Gondwanian elements were first introduced by India, which detached from Gondwana approximately 90 MYA, carrying its Gondwana-derived flora and fauna northward, which included cichlid fish and the flowering plant families Crypteroniaceae and possibly Dipterocarpaceae. In Astronomy, Geology, and Paleontology, mya or " mya " is an abbreviation for "million years ago". Cichlids (ˈsɪklɪd are Fish from the family Cichlidae in the order Perciformes. The flowering plants or angiosperms ( Angiospermae or Magnoliophyta) are the most widespread group In Biological classification, family ( Latin Crypteroniaceae is a family of flowering Trees and Shrubs The family includes about 10 species in 3 genera, native to Indomalaya India collided with Asia 30-45 MYA, and exchanged species. Later, as Australia-New Guinea drifted north, the collision of the Australian and Asian plates pushed up the islands of Wallacea, which were separated from one another by narrow straits, allowing a botanic exchange between Indomalaya and Australasia. Wallacea is a biogeographical designation for a group of Indonesian islands separated by deep water Straits from the Asian and Australian The Australasian zone is an ecological region that is coincident but not synonymous (by some definitions with the geographic Region of Australasia Asian rainforest flora, including the dipterocarps, island-hopped across Wallacea to New Guinea, and several Gondwanian plant families, including podocarps and araucarias, moved westward from Australia-New Guinea into western Malesia and Southeast Asia. Podocarpaceae is a large family of mainly Southern Hemisphere Conifers with 18-19 genera and about 170-200 species of Evergreen Trees and Araucaria is a Genus of Evergreen coniferous Trees in the family Araucariaceae.

Flora and fauna

Two orders of mammals, the colugos (Dermoptera) and treeshrews (Scandentia), are endemic to the ecozone, as are families Craseonycteridae (Kitti's Hog-nosed Bat), Diatomyidae, Platacanthomyidae, Tarsiidae (tarsiers) and Hylobatidae (gibbons). The treeshrews (or tree shrews) are small Mammals native to the tropical forests of Southeast Asia. Endemism is the Ecological state of being unique to a place Endemic species are not naturally found elsewhere Kitti's Hog-nosed Bat ( Craseonycteris thonglongyai) also known as the bumblebee bat, is an Endangered species of Bat and the only member Diatomyidae is a family of Hystricomorphous, Sciurognathous Rodents found in Asia. The Rodent family Platacanthomyidae, or Oriental Dormice, includes the spiny dormice and the Chinese pygmy dormice. Tarsiers are Prosimian Primates of the genus Tarsius, a Monotypic genus in the family Tarsiidae, which is itself the Gibbons are the small Apes in the family Hylobatidae. The family is divided into four genera based on their Diploid Chromosome Large mammals characteristic of Indomalaya include the leopard, tigers, water buffalos, Asian Elephant, Indian Rhinoceros, Javan Rhinoceros, Malayan Tapir, orangutans, and gibbons. The leopard (lɛpɚd Panthera pardus) is an Old World Mammal of the Felidae family and the smallest of the four roaring The tiger ( Panthera tigris) is a member of the Felidae family the largest and the most powerful of the four " Big cats quot in the Genus The Asian or Asiatic Elephant ( Elephas maximus) sometimes known by the name of one of its subspecies &ndash the Indian Elephant, is one of The Indian Rhinoceros or the Great One-horned Rhinoceros or the Asian One-horned Rhinoceros ( Rhinoceros unicornis) is a large mammal found in Nepal The Javan Rhinoceros ( Sunda Rhinoceros to be more precise or Lesser One-horned Rhinoceros ( Rhinoceros sondaicus) is a member of the family Rhinocerotidae The Malayan Tapir ( Tapirus indicus) also called the Asian Tapir, is the largest of the four species of Tapir and the only one native to Asia The orangutans are two Species of great apes known for their intelligence long arms and reddish-brown hair Gibbons are the small Apes in the family Hylobatidae. The family is divided into four genera based on their Diploid Chromosome

Indomalaya has three endemic bird families, the Irenidae (leafbirds and fairy bluebirds), Megalaimidae and Rhabdornithidae (Philippine creepers). The leafbirds ( Chloropseidae) are a family of small Passerine Bird species found in India, Sri Lanka and Southeast Asia The two fairy-bluebirds are small Passerine Bird Species found in forests and plantations in tropical southern Asia and the Philippines A family of Birds comprising the Asian barbets, the Megalaimidae were once united with all other barbets in the Capitonidae (Short & Horne 2002 but The Philippine creepers or rhabdornises are small passerine Birds The family is endemic to the Philippines. Also characteristic are pheasants, pittas, Old World babblers, and flowerpeckers. Pheasants are a group of large Birds in the order Galliformes. Pittas are a family, Pittidae, of Passerine Birds mainly found in tropical Asia and Australasia, although a couple of species The Old World babblers or timaliids are a large family of mostly Old World Passerine Birds They are rather diverse in size and coloration The flowerpeckers are a family of Passerine Birds found in tropical southern Asia and Australasia from India east to the Philippines

See also

Malesia
Sundaland
Ecoregions of India
Ecoregions of the Philippines

Indomalaya terrestrial ecoregions

Andaman Islands rain forests India
Borneo lowland rain forests Brunei, Indonesia, Malaysia
Borneo montane rain forests Brunei, Indonesia, Malaysia
Borneo peat swamp forests Brunei, Indonesia, Malaysia
Brahmaputra Valley semi-evergreen forests India
Cardamom Mountains rain forests Cambodia, Thailand, Vietnam
Chao Phraya freshwater swamp forests Thailand
Chao Phraya lowland moist deciduous forests Thailand
Chin Hills-Arakan Yoma montane forests Burma, India
Christmas and Cocos Islands tropical forests Australia
Eastern highlands moist deciduous forests India
Eastern Java-Bali montane rain forests Indonesia
Eastern Java-Bali rain forests Indonesia
Greater Negros-Panay rain forests Philippines
Hainan Island monsoon rain forests China
Himalayan subtropical broadleaf forests Bhutan, India, Nepal
Irrawaddy freshwater swamp forests Burma
Irrawaddy moist deciduous forests Burma
Jian Nan subtropical evergreen forests China
Kayah-Karen montane rain forests Burma, Thailand
Lower Gangetic Plains moist deciduous forests Bangladesh, India
Luang Prabang montane rain forests Laos
Luzon montane rain forests Philippines
Luzon rain forests Philippines
Malabar Coast moist forests India
Maldives-Lakshadweep-Chagos Archipelago tropical moist forests British Indian Ocean Territory, India, Maldives
Meghalaya subtropical forests India
Mentawai Islands rain forests Indonesia
Mindanao montane rain forests Philippines
Mindanao-Eastern Visayas rain forests Philippines
Mindoro rain forests Philippines
Mizoram-Manipur-Kachin rain forests Bangladesh, India, Burma
Myanmar coastal rain forests Burma
Nansei Islands subtropical evergreen forests Japan
Nicobar Islands rain forests India
North Western Ghats moist deciduous forests India
North Western Ghats montane rain forests India
Northern Annamites rain forests Laos, Vietnam
Northern Indochina subtropical forests China, Laos, Burma, Thailand, Vietnam
Northern Khorat Plateau moist deciduous forests Laos, Thailand
Northern Thailand-Laos moist deciduous forests Laos, Thailand
Northern Triangle subtropical forests Burma
Northern Vietnam lowland rain forests Vietnam
Orissa semi-evergreen forests India
Palawan rain forests Philippines
Peninsular Malaysian montane rain forests Malaysia, Thailand
Peninsular Malaysian peat swamp forests Malaysia, Thailand
Peninsular Malaysian rain forests Indonesia, Malaysia
Red River freshwater swamp forests Vietnam
South China Sea Islands disputed between China, Malaysia, Philippines, Taiwan, Vietnam
South China-Vietnam subtropical evergreen forests China, Vietnam
South Taiwan monsoon rain forests Taiwan
South Western Ghats moist deciduous forests India
South Western Ghats montane rain forests India
Southern Annamites montane rain forests Cambodia, Laos, Vietnam
Southwest Borneo freshwater swamp forests Indonesia
Sri Lanka lowland rain forests Sri Lanka
Sri Lanka montane rain forests Sri Lanka
Sulu Archipelago rain forests Philippines
Sumatran freshwater swamp forests Indonesia
Sumatran lowland rain forests Indonesia
Sumatran montane rain forests Indonesia
Sumatran peat swamp forests Indonesia
Sundaland heath forests Indonesia
Sundarbans freshwater swamp forests Bangladesh, India
Taiwan subtropical evergreen forests Taiwan
Tenasserim-South Thailand semi-evergreen rain forests Malaysia' Burma, Thailand
Tonle Sap freshwater swamp forests Cambodia, Vietnam
Tonle Sap-Mekong peat swamp forests Cambodia, Vietnam
Upper Gangetic Plains moist deciduous forests India
Western Java montane rain forests Indonesia
Western Java rain forests Indonesia
Central Deccan Plateau dry deciduous forests India
Central Indochina dry forests Cambodia, Laos, Thailand, Vietnam
Chota-Nagpur dry deciduous forests India
East Deccan dry evergreen forests India
Irrawaddy dry forests Burma
Kathiarbar-Gir dry deciduous forests India
Narmada Valley dry deciduous forests India
Northern dry deciduous forests India
South Deccan Plateau dry deciduous forests India
Southeastern Indochina dry evergreen forests Cambodia, Laos, Thailand
Southern Vietnam lowland dry forests Vietnam
Sri Lanka dry-zone dry evergreen forests Sri Lanka
Himalayan subtropical pine forests Bhutan, India, Nepal, Pakistan
Luzon tropical pine forests Philippines
Northeast India-Myanmar pine forests Burma, India
Sumatran tropical pine forests Indonesia
Eastern Himalayan broadleaf forests Bhutan, India, Nepal
Northern Triangle temperate forests Burma
Western Himalayan broadleaf forests India, Nepal, Pakistan
Eastern Himalayan subalpine conifer forests Bhutan, India, Nepal
Western Himalayan subalpine conifer forests India, Nepal, Pakistan
Terai-Duar savanna and grasslands Bhutan, India, Nepal
Rann of Kutch seasonal salt marsh India, Pakistan
Kinabalu montane alpine meadows Malaysia
Deccan thorn scrub forests India, Sri Lanka
Indus Valley desert India, Pakistan
Northwestern thorn scrub forests India, Pakistan
Thar desert India, Pakistan
Indomalaya Mangrove
v  d  e
Godavari-Krishna mangroves India
Indochina mangroves Cambodia, Malaysia, Thailand, Vietnam
Indus River Delta-Arabian Sea mangroves Pakistan
Myanmar coast mangroves Burma, India, Malaysia, Thailand
Sunda Shelf mangroves Brunei, Indonesia, Malaysia
Sundarbans mangroves Bangladesh, India

External links

References


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