The Chin Hills-Arakan Yoma montane forests is a

tropical and subtropical moist broadleaf forest Tropical and subtropical moist broadleaf forests (TSMF), also known as tropical moist forest, is a subtropical and tropical forest habitat type defined by the World Wide Fund for Nature. Description TSMF is generally found in large, discont ...

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 l ...

in western

Myanmar Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only some British English speakers pronounce r at the end of syllables. As John C. Wells, Joh ...

(Burma). Surrounded at lower elevations by moist tropical forests, this ecoregion is home a diverse range of subtropical and temperate species, including many species characteristic of the

Himalayas The Himalayas, or Himalaya (; ; ), is a mountain range in Asia, separating the plains of the Indian subcontinent from the Tibetan Plateau. The range has some of the planet's highest peaks, including the very highest, Mount Everest. Over 100 ...

, as well as many

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

species.

Setting

The ecoregion covers an area of , encompassing the

montane forest Montane ecosystems are found on the slopes of mountains. The alpine climate in these regions strongly affects the ecosystem because temperatures fall as elevation increases, causing the ecosystem to stratify. This stratification is a crucial f ...

s of the

Arakan Mountains The Arakan Mountains ( my, ရခိုင်ရိုးမ), also known as the Rakhine Yoma, are a mountain range in western Myanmar, between the coast of Rakhine State and the Central Myanmar Basin, in which flows the Irrawaddy River. It is th ...

. The

Chin Hills The Chin Hills are a range of mountains in Chin State, northwestern Burma, Burma (Myanmar), that extends northward into India's Manipur state. Geography The highest peak in the Chin Hills is Khonu Msung, or Mount Victoria, in southern Chin State ...

, which cover most of Burma's

Chin State Chin State (, ) is a state in western Myanmar. The Chin State is bordered by Sagaing Division and Magway Division to the east, Rakhine State to the south, Bangladesh to the south-west, and the Indian states of Mizoram to the west and Manipur t ...

, and extend south along the ridge of the Arakan Mountains forms the boundary between

Rakhine State Rakhine State (; , , ; formerly known as Arakan State) is a Administrative divisions of Myanmar, state in Myanmar (Burma). Situated on the western coast, it is bordered by Chin State to the north, Magway Region, Bago Region and Ayeyarwady R ...

on the west and

Magway Region Magway Region ( my, မကွေးတိုင်းဒေသကြီး, ; formerly Magway Division) is an administrative divisions of Myanmar, administrative division in central Myanmar. It is the second largest of Myanmar's seven divisions, ...

Bago Region Bago Region ( my, ပဲခူးတိုင်းဒေသကြီး, ; formerly Pegu Division and Bago Division) is an administrative region of Myanmar, located in the southern central part of the country. It is bordered by Magway Region ...

, and

Ayeyarwady Region Ayeyarwady Region ( my, ဧရာဝတီတိုင်းဒေသကြီး , , ; formerly Ayeyarwady Division and Irrawaddy Division), is a region of Myanmar, occupying the delta region of the Ayeyarwady River (Irrawaddy River). It is bor ...

to the east. The ecoregion is bounded by the

Mizoram–Manipur–Kachin rain forests The Mizoram–Manipur–Kachin rain forests is a subtropical moist broadleaf forest ecoregion which occupies the lower hillsides of the mountainous border region joining India, Bangladesh, and Burma (Myanmar). The ecoregion covers an area of . ...

to the west, north, and northeast, and the Irrawaddy moist deciduous forests to the east. Two enclaves of Northeast India–Myanmar pine forests lie immediately to the north. The ecoregion includes

Nat Ma Taung Nat Ma Taung ( my, နတ်မတောင်; Khaw-nu-soum or Khonuamthung in Chin), also known as Mount Victoria, is the highest mountain in the Chin State of western Burma. Geography With a height of above sea level and a prominence of , ...

(Mount Victoria) in southern Chin State, which rises to above sea level.

Flora

The plant communities in the ecoregion vary with elevation. Lower montane forests occur below 1000 meters elevation. Dominant canopy trees include ''

Bauhinia variegata ''Bauhinia variegata'' is a species of flowering plant in the legume family, Fabaceae. It is native to an area from China through Southeast Asia to the Indian subcontinent. Common names include orchid tree (though not belonging to the family O ...

Lagerstroemia speciosa ''Lagerstroemia speciosa'' (giant crepe-myrtle, Queen's crepe-myrtle, banabá plant, or pride of India) is a species of ''Lagerstroemia'' native to tropical southern Asia. It is a deciduous tree with bright pink to light purple flowers. Etymolo ...

Derris robusta ''Derris robusta'' is a tree species in the genus ''Derris'' found in India. Derrubone is an isoflavone, a type of flavonoid, originally isolated from ''D. robusta''. References External links Millettieae Plants described in 1 ...

'', and species of ''

Ficus ''Ficus'' ( or ) is a genus of about 850 species of woody trees, shrubs, vines, epiphytes and hemiepiphytes in the family Moraceae. Collectively known as fig trees or figs, they are native throughout the tropics with a few species extending in ...

Hibiscus ''Hibiscus'' is a genus of flowering plants in the mallow family, Malvaceae. The genus is quite large, comprising several hundred species that are native to warm temperate, subtropical and tropical regions throughout the world. Member species ...

'', and '' Strobilanthes''.

Liana A liana is a long- stemmed, woody vine that is rooted in the soil at ground level and uses trees, as well as other means of vertical support, to climb up to the canopy in search of direct sunlight. The word ''liana'' does not refer to a ta ...

s drape the mature forests, especially ''

Congea tomentosa ''Congea tomentosa'' is a large tropical evergreen vine, commonly referred to as wooly congea, shower orchid, or shower of orchid. (Despite the name, it is not closely related to orchids). It is called ''lluvia de orquideas'' or ''terciopelo'' i ...

'' and ''

Mucuna pruriens ''Mucuna pruriens'' is a tropical legume native to Africa and tropical Asia and widely naturalized and cultivated. Its English common names include monkey tamarind, velvet bean, Bengal velvet bean, Florida velvet bean, Mauritius velvet bean, Yo ...

''. Mixed evergreen broadleaf forest is predominant between 1000 and 2100 meters elevation. Species of

oak An oak is a tree or shrub in the genus ''Quercus'' (; Latin "oak tree") of the beech family, Fagaceae. There are approximately 500 extant species of oaks. The common name "oak" also appears in the names of species in related genera, notably ''L ...

''(Quercus),

Castanopsis ''Castanopsis'', commonly called chinquapin or chinkapin, is a genus of evergreen trees belonging to the beech family, Fagaceae. The genus contains about 140 species, which are today restricted to tropical and subtropical eastern Asia. A total o ...

Eugenia ''Eugenia'' is a genus of flowering plants in the myrtle family Myrtaceae. It has a worldwide, although highly uneven, distribution in tropical and subtropical regions. The bulk of the approximately 1,100 species occur in the New World tropics, ...

Saurauia ''Saurauia'' is a genus of plants in the family Actinidiaceae. It comprises about over 300 species distributed in the tropics and subtropics of Asia and South and Central America. Genetic evidence and the cell biology of the group support monophy ...

Eriobotrya ''Eriobotrya'' is a genus of flowering plants, mostly large evergreen shrubs and small trees in the family Rosaceae, native to woodland in the Himalayas and East Asia. The loquat, ''E. japonica'', is grown for its edible fruit. ''Eriobotrya'' sp ...

'', and ''

Schima ''Schima'' is a genus of evergreen trees belonging to the tea family, Theaceae. The genus inhabits warm temperate to subtropical climates across southern and southeastern Asia, from the eastern Himalaya of Nepal and eastern India across Indochin ...

'' are the dominant canopy trees. Montane cloud forests occur above 2000 meters elevation. In the transition zone to the lower-elevation mixed broadleaf evergreen forests, the predominant tree species are typical of the

, including ''

Alnus nepalensis ''Alnus nepalensis'' is a large alder tree found in the subtropical highlands of the Himalayas. The tree is called Utis in Nepali and Nepalese alder in English. It is used in land reclamation, as firewood and for making charcoal. Description ...

, Betula alnoides'', and species of ''

Carpinus Hornbeams are hardwood trees in the flowering plant genus ''Carpinus'' in the birch family Betulaceae. The 30–40 species occur across much of the temperate regions of the Northern Hemisphere. Origin of names The common English name ''hornbeam' ...

Prunus ''Prunus'' is a genus of trees and shrubs, which includes (among many others) the fruits plums, cherries, peaches, nectarines, apricots, and almonds. Native to the North American temperate regions, the neotropics of South America, and the p ...

Pyrus Pears are fruits produced and consumed around the world, growing on a tree and harvested in the Northern Hemisphere in late summer into October. The pear tree and shrub are a species of genus ''Pyrus'' , in the family Rosaceae, bearing the po ...

'', and ''

Torreya ''Torreya'' is a genus of conifers comprising six or seven species placed in the family Taxaceae, though sometimes formerly placed in Cephalotaxaceae. Four species are native to eastern Asia; the other two are native to North America. They are ...

''. At higher elevations, species of '' Castanea,

Cornus ''Cornus'' is a genus of about 30–60 species of woody plants in the family Cornaceae, commonly known as dogwoods, which can generally be distinguished by their blossoms, berries, and distinctive bark. Most are deciduous trees or shrub ...

, Eriobotrya,

Laurus ''Laurus'' () is a genus of evergreen trees or shrubs belonging to the laurel family, Lauraceae. The genus contains three or more species, including the bay laurel or sweet bay, ''L. nobilis'', widely cultivated as an ornamental plant and a cul ...

'', and ''

Taxus ''Taxus'' is a genus of coniferous trees or shrubs known as yews in the family Taxaceae. They are relatively slow-growing and can be very long-lived, and reach heights of , with trunk girth averaging . They have reddish bark, lanceolate, flat, ...

'' become more common.

Epiphyte An epiphyte is an organism that grows on the surface of a plant and derives its moisture and nutrients from the air, rain, water (in marine environments) or from debris accumulating around it. The plants on which epiphytes grow are called phoroph ...

s grow abundantly on the trees in the montane cloud forests, and common epiphytes include species of ''

Aeschynanthus ''Aeschynanthus'' is a genus of about 150 species of evergreen subtropical and tropical plants in the family Gesneriaceae. They are usually trailing epiphytes with brightly colored flowers that are pollinated by sunbirds. The genus name comes fro ...

'' and ''

Agapetes ''Agapetes'' (Gk. ἀγαπητός (agapetos) = 'beloved') is a semi-climbing shrub genus native to the Himalayas, grown as an ornamental for its attractive pendulous bunches of red tubular flowers blooming over a long period. It is mostly grow ...

, Rhododendron cuffeanum'',

aroid The Araceae are a family of monocotyledonous flowering plants in which flowers are borne on a type of inflorescence called a spadix. The spadix is usually accompanied by, and sometimes partially enclosed in, a spathe (or leaf-like bract). Also ...

s, and the

orchid Orchids are plants that belong to the family Orchidaceae (), a diverse and widespread group of flowering plants with blooms that are often colourful and fragrant. Along with the Asteraceae, they are one of the two largest families of flowering ...

s ''

Dendrobium ''Dendrobium'' is a genus of mostly epiphytic and lithophytic orchids in the family Orchidaceae. It is a very large genus, containing more than 1,800 species that are found in diverse habitats throughout much of south, east and southeast Asia, i ...

'' and '' Pleione''. The tree '' Lithocarpus xylocarpus'' is common between 2,400 and 2,750 meters elevation. ''

Rhododendron arboreum ''Rhododendron arboreum'', the tree rhododendron, is an evergreen shrub or small tree with a showy display of bright red flowers. It is found in Bhutan, China, India, Myanmar, Nepal, Sri Lanka, Pakistan and Thailand. It is the national flower ...

'' and ''

Quercus semecarpifolia ''Quercus semecarpifolia'' is an Asian species of oak. It is native to the Himalayas and nearby mountains in Tibet, Afghanistan, India, Nepal, and Pakistan. It is classified in subgenus ''Cerris'', section ''Ilex''. ''Quercus semecarpifolia'' i ...

'' are dominant above 2,750 meters elevation. Above 3000 meters elevation on Nat Ma Taung, shrub forests of ''

Hypericum patulum ''Hypericum patulum'', known as goldencup St. John's wort or yellow mosqueta, is a species of flowering plant in ''Hypericum'' sect. ''Ascyreia''. Taxonomy ''Hypericum patulum'' was originally described by Carl Peter Thunberg in 1784. It was ...

'' and '' Rhododendron burmanicum'' occur, with herbaceous plants including species of ''

Aconitum ''Aconitum'' (), also known as aconite, monkshood, wolf's-bane, leopard's bane, mousebane, women's bane, devil's helmet, queen of poisons, or blue rocket, is a genus of over 250 species of flowering plants belonging to the family Ranunculaceae. ...

Lactuca ''Lactuca'', commonly known as lettuce, is a genus of flowering plants in the family Asteraceae. The genus includes at least 50 species, distributed worldwide, but mainly in temperate Eurasia. Its best-known representative is the garden lettuce ...

Pedicularis ''Pedicularis'' is a genus of perennial green root parasite plants currently placed in the family Orobanchaceae (the genus previously having been placed in Scrophulariaceae ''sensu lato''). Description Between 350 and 600 species are accep ...

'', and '' Veronica''. Some summit ridges are covered in a temperate shrub savanna, with shrub species of ''

Rhododendron ''Rhododendron'' (; from Ancient Greek ''rhódon'' "rose" and ''déndron'' "tree") is a very large genus of about 1,024 species of woody plants in the heath family (Ericaceae). They can be either evergreen or deciduous. Most species are nati ...

Buddleja ''Buddleja'' (; ''Buddleia''; also historically given as ''Buddlea'') is a genus comprising over 140 species of flowering plants endemic to Asia, Africa, and the Americas. The generic name bestowed by Linnaeus posthumously honoured the Revere ...

Daphne Daphne (; ; el, Δάφνη, , ), a minor figure in Greek mythology, is a naiad, a variety of female nymph associated with fountains, wells, springs, streams, brooks and other bodies of freshwater. There are several versions of the myth in whi ...

, Leycesteria'', and ''

Lonicera Honeysuckles are arching shrubs or twining vines in the genus ''Lonicera'' () of the family Caprifoliaceae, native to northern latitudes in North America and Eurasia. Approximately 180 species of honeysuckle have been identified in both contin ...

'' interspersed among tall grasses and herbs including species of ''Aconitum,

Delphinium ''Delphinium'' is a genus of about 300 species of annual and perennial flowering plants in the family (biology), family Ranunculaceae, native plant, native throughout the Northern Hemisphere and also on the high mountains of tropical Africa. Th ...

Geranium ''Geranium'' is a genus of 422 species of annual, biennial, and perennial plants that are commonly known as geraniums or cranesbills. They are found throughout the temperate regions of the world and the mountains of the tropics, but mostly in ...

'', and ''

Thalictrum ''Thalictrum'' () is a genus of 120-200 species of herbaceous perennial flowering plants in the buttercup family, Ranunculaceae, native mostly to temperate regions. Meadow-rue is a common name for plants in this genus. ''Thalictrum'' is a taxonom ...

''.

Fauna

The ecoregion is home to several threatened and endangered mammals, including the

hoolock gibbon The hoolock gibbons are three primate species of genus ''Hoolock'' in the gibbon family, Hylobatidae, native to eastern Bangladesh, Northeast India, Myanmar, and Southwest China. Description Hoolocks are the second-largest of the gibbons, after ...

(''Hylobates hoolock''),

tiger The tiger (''Panthera tigris'') is the largest living cat species and a member of the genus '' Panthera''. It is most recognisable for its dark vertical stripes on orange fur with a white underside. An apex predator, it primarily preys on u ...

(''Panthera tigris''),

leopard The leopard (''Panthera pardus'') is one of the five extant species in the genus '' Panthera'', a member of the cat family, Felidae. It occurs in a wide range in sub-Saharan Africa, in some parts of Western and Central Asia, Southern Russia, a ...

(''Panthera pardus''),

clouded leopard The clouded leopard (''Neofelis nebulosa''), also called the mainland clouded leopard, is a wild cat inhabiting dense forests from the foothills of the Himalayas through mainland Southeast Asia into South China. In the early 19th century, a cl ...

(''Pardofelis nebulosa''),

sun bear The sun bear (''Helarctos malayanus'') is a species in the family Ursidae (the only species in the genus ''Helarctos'') occurring in the tropical forests of Southeast Asia. It is the smallest bear, standing nearly at the shoulder and weighing ...

(''Ursus malayanus''),

Eld's deer Eld's deer (''Rucervus eldii'' or ''Panolia eldii''Pitraa, Fickela, Meijaard, Groves (2004). ''Evolution and phylogeny of old world deer.'' Molecular Phylogenetics and Evolution 33: 880–895.), also known as the thamin or brow-antlered deer, is ...

or thamin (''Cervus eldii''), and

gaur The gaur (''Bos gaurus''; ), also known as the Indian bison, is a bovine native to South Asia and Southeast Asia, and has been listed as Vulnerable on the IUCN Red List since 1986. The global population was estimated at a maximum of 21,000 m ...

(''Bos gaurus''). There are no endemic mammals. Three bird species are endemic to the ecoregion – the

striped laughingthrush The striped laughingthrush (''Trochalopteron virgatum'') is a species of bird in the family Leiothrichidae. It is found in the Patkai range, where its natural habitat is subtropical or tropical moist montane forest Montane ecosystems are fo ...

(''Trochalopteron virgatus''), brown-capped laughingthrush (''Trochalopteron austeni''), and

white-browed nuthatch The white-browed nuthatch (''Sitta victoriae''), also known as the Victoria nuthatch, is a species of bird in the family Sittidae. It is a small nuthatch, measuring in length and without sexual dimorphism. Like many other nuthatches ...

(''Sitta victoriae'').

Conservation

A 2017 assessment found that , or 6%, of the ecoregion is in

protected area Protected areas or conservation areas are locations which receive protection because of their recognized natural, ecological or cultural values. There are several kinds of protected areas, which vary by level of protection depending on the ena ...

s. Protected areas include Bwe Par Taung National Park and

Natmataung National Park Natmataung National Park is a national park in Myanmar covering . It was established in 2010 and is listed as one of the ASEAN Heritage Parks. In elevation, it ranges from surrounding Nat Ma Taung in Mindat and Kanpetlet Townships, Chin State ...

.Chin Hills-Arakan Yoma montane forests
. DOPA Explorer. Accessed 9 May 2022. Another 84% of the ecoregion is forested but outside protected areas.

References

External links

* {{DEFAULTSORT:Chin Hills-Arakan Yoma montane forests Ecoregions of Myanmar * Forests of Myanmar Montane forests Indomalayan ecoregions Tropical and subtropical moist broadleaf forests