| Meghalaya subtropical forests | |
| Map: | Ecoregion IM0126.png |
| Biogeographic Realm: | Indomalayan |
| Biome: | tropical and subtropical moist broadleaf forests |
| Border: | Mizoram–Manipur–Kachin rain forests |
| Border1: | Brahmaputra Valley semi-evergreen forests |
| Border2: | Lower Gangetic Plains moist deciduous forests |
| Bird Species: | 659 |
| Mammal Species: | 110 |
| Area: | 41,700 |
| Country: | India |
| Country1: | Bangladesh |
| State: | Meghalaya |
| State1: | Assam |
| State2: | Nagaland |
| Geology: | Limestone formations (Karbi-Meghalaya plateau and westward arm of the Patkai Range) |
| Conservation: | Vulnerable |
| Protected: | 1.07 (2.78) |
| Protected Ref: | [1] |
The Meghalaya subtropical forests is an ecoregion of Northeast India. The ecoregion covers an area of 41700km2, and despite its name, comprise not only the state of Meghalaya, but also parts of southern Assam, and a tiny bit of Nagaland around Dimapur and adjacent Bangladesh. It also contains many other habitats than subtropical forests, but the montane subtropical forests found in Meghalaya is an important biome, and was once much more widespread in the region, and for these reasons chosen as the most suitable name.[2] [3] The scientific designation is IM0126.
The Meghalaya subtropical forests are part of the larger Indo-Burma biological hotspot with many endemic species not found anywhere else in the world. Together with the Western Ghats, Northeast India are the only two regions of India endowed with rainforest. For these and other reasons, protection and conservation of the Meghalaya subtropical forests are important on a local, national, regional and even global level.
The ecoregion is one of the most species-rich areas in India, with a rich diversity of birds, mammals, and plants in particular. The lowlands holds mostly tropical forests, while the hills and mountains, that comprise most of the area, are covered in grasslands and several distinct types of forest habitats, including subtropical moist broadleaf forests in some of the montane areas above 1,000 metres. The region is one of the wettest areas in the world, with some places, notably Mawsynram and Cherrapunji in the south of Meghalaya, receiving up to eleven meters of rain in a year.
The Brahmaputra Valley semi-evergreen forests ecoregion lies to the north, the Mizoram–Manipur–Kachin rain forests ecoregion lies to the east, and the Lower Gangetic Plains moist deciduous forests ecoregion lies to the west and south in Bangladesh.
The elevated and damp forest ecoregion is a center of diversity for the tree genera Magnolia and Michelia, and the families Elaeocarpaceae and Elaeagnaceae. Over 320 species of orchids are native to Meghalaya. The endemic pitcher plant (Nepenthes khasiana) is now an endangered species. About 3,128 flowering plant species have been reported from the state, of which 1,236 are endemic.[4] In the later half of the 1800s, Joseph Dalton Hooker, a British botanist and explorer, made a huge taxonomic collection for the Kew Herbarium from Khasi and Jaintia Hills and remarked the place as one of the richest biodiversity spots in India, perhaps in all of Asia as well.[5] Meghalaya state is rich in medicinal plant species, but the natural occurrence of most medicinal plants has decreased due to habitat loss. A total of 131 RET (Rare, Endemic and Threatened) medicinal plant species, including 36 endemic and 113 species under different threat categories, are found within Meghalaya.[6]
As in other rural areas of India, Meghalaya villages have an ancient tradition of nurturing sacred groves. These are sacred spots within the forest where medicinal and other valued plants are grown and harvested sustainably, and they present a very high biodiversity. In Meghalaya these sacred groves are known as Law Kyntang or Law Lyngdoh.[7] [8]
The montane ecoregion is home to a diverse mix of birds, with a total of 659 species recorded as of 2017. Some of the birds living here are endemic to the Indo-Burma ecoregion, and quite a few species are threatened or near threatened on a global scale. Of these, two kinds of vultures, the Oriental White-backed Vulture and the Slender-billed Vulture, are both in need of extra protection as critically endangered species near extinction. The Meghalaya forests are not only important as a wildlife refuge for birds, it is also important to migratory birds on their long-distance flights.[9] [10]
The subtropical forests presents a diverse range of reptiles, with as much as 56 species of known snakes, in addition to several lizards and turtles. The Tokay Gecko, among the largest geckos in the world, are here, as are three different kinds of monitor lizards, all of them to be protected since 1972, and a new species of skink (sphenomorphus apalpebratus) was discovered in the forests as late as 2013. Both Brahminy Blind snake and Copperhead Rat Head are among the more common snakes encountered in the forests, but there are several venomous and deadly serpents too, such as the Green Pit viper and the King Cobra, the longest venomous snake in the world. Many of the snake species here are elusive (and rare), such as the Cherrapunji keelback, Khasi keelback or Khasi earth snake.
The damp and moist environment of the Meghalaya forests also supports what is the most diverse range of amphibians in North-east India, with a total of 33 recorded species living here. The two frog species Shillong bush frog and Khasi Hill toad are endemic, and both rare and threatened.
Molluscs thrive in the moist conditions and are abundant throughout, both on land and in the water, As much as 223 species has been recorded by science, and many of the land-dwelling molluscs are endemic to Meghalaya. Fresh water molluscs are generally considered a good indicator species of clean waters, and Meghalaya's waterways are home to 35 species, with a lot of paludomus-snails in the hill streams. Several types of fresh water snails are part of the hill tribes diet, including the large bellamya bengalensis snails.
Situated between the mighty Brahmaputra in the north and the Barak River to the south, Meghalaya's many waterways are also home to a diverse range of fish species. 152 known species has been observed as of 2017. Two types of mahseer (neolissochilus and tor) are fished for sport.
The subtropical forests are home to 110 species of mammals, none of which are endemic. By far, most of these species comprise smaller mammals, in particular bats and small carnivores, and the population of large mammals is comparatively sparse. The Western hoolock gibbons in the forests of Meghalaya are globally endangered, and also threatened in this particular habitat, but they have a special place among the local tribes who cherish their song. Other large mammals important to conservation here includes the tiger (Panthera tigris), clouded leopard (Pardofelis nebulosa), Asian elephant (Elephas maximus), dhole or Asiatic wild dog (Cuon alpinus), sun bear (Ursus malayanus), sloth bear (Melursus ursinus), smooth-coated otter (Lutrogale perspicillata), Indian civet (Viverra zibetha), Chinese pangolin (Manis pentadactyla), Indian pangolin (Manis crassicaudata), Assamese macaque (Macaca assamensis), bear macaque (Macaca arctoides), and capped leaf monkey (Semnopithecus pileatus).
The ecoregion has several national parks and wildlife sanctuaries, but they are all of relatively small size.[11] In addition, Meghalaya holds a total of 712.74 km2 reserved forest and 12.39 km2 protected forest.[12]
Some of the reserved forest is used by locals for voluntary wildlife reserves, in particular to help save the threatened Hoolock Gibbons.[15] [16] [17] Other parts of the reserved forest are maintained as wildlife corridors, for elephants for example, and to safeguard against damaging habitat fragmentation.[18]
The nature and wildlife of Meghalaya, and the montane rainforests of the ecoregion in particular, is of interest to the tourist industry in the area, and to cater for these interests, an Eco Park has been created in Cherrapunjee.[19] Several waterfalls and caves of the region are also of interest to nature loving tourists.[20]
The state of Meghalaya maintains a total of three botanical gardens, all three are in the capital of Shillong.[21]
The Meghalaya subtropical forest ecoregion is part of the larger Indo-Burma biological hotspot with many endemic species not found anywhere else in the world. Together with the Western Ghats, Northeast India are the only two regions of India, endowed with rainforest. For these, and other, reasons, protection and conservation of the Meghalaya subtropical forests are important on a local, national, regional and even global level.[22] [23]
As seen in other rainforests of the world, deforestation occurs on an alarming scale in Meghalaya too, with accelerated clearcutting for agriculture, industry, mining and infrastructure projects since the 1990s. Apart from the obvious loss of primary forest, this has also caused local problems with soil erosion and fragmentation of habitats. The clearcut areas in Meghalaya are sometimes allowed to regrow, but the second-growth forests are much less species-rich (both flora and fauna), than the original forest. In addition to these problematic issues, the dense forest habitats of Meghalaya are also dwindling because of tree thinning. This forestry practise puts extra pressure on species that can only thrive in dense forests. The root motivation for the increase in these environmentally changing practises are thought to be a high population growth and increased industrial activity in Meghalaya.[24]