| Western Himalayan subalpine conifer forests | |
|---|---|
 | |
 Ecoregion territory (in purple) | |
| Ecology | |
| Realm | Indomalayan |
| Biome | temperate coniferous forests |
| Borders | |
| Bird species | 315 [1] |
| Mammal species | 102 [1] |
| Geography | |
| Area | 39,700 km2 (15,300 sq mi) |
| Countries | |
| Conservation | |
| Habitat loss | 62.318% [1] |
| Protected | 6.18% [1] |
The Western Himalayan subalpine conifer forests is a temperate coniferous forests ecoregion of the middle and upper elevations of the western Middle Himalayas of Nepal, India, and Pakistan.
The ecoregion forms a belt of coniferous forest covering 39,700 square kilometres (15,300 sq mi) on elevations between 3,000 and 3,500 metres (9,800 and 11,500 ft). It extends west from the Gandaki River in Nepal, through the Indian states of Uttarakhand, Himachal Pradesh, and Jammu and Kashmir into northern Pakistan. This belt of conifers is the highest expanse of woodland to be found on the slopes of the Himalayas, treeless alpine scrub lying just above its ecotopic frontier. It is a valuable ecosystem as many Himalayan birds and animals migrate seasonally up and down the mountains spending part of the year in the conifer forests, so conservation is a high priority. [2]
This ecoregion is drier than the Eastern Himalayan subalpine conifer forests, which receive more moisture from the Bay of Bengal monsoon.
Several distinct forest types are found in this ecoregion. Fir trees ( Abies spectabilis ) in places grow in nearly pure stands. In other areas they mix with kharsu oak ( Quercus semecarpifolia ). Rhododendron campanulatum , Abies spectabilis, Larix griffithii, Juniperus recurva, Juniperus indica, Juniperus communis, Pinus roxburghii, Pinus hwangshanensis, Juniperus tibetica, Shorea robusta, Olea europaea subsp. cuspidata, Taxus sumatrana, Alnus nepalensis, Betula alnoides, Betula utilis, Picea brachytyla, Juglans regia, Larix gmelinii, Larix sibirica, Larix × czekanowskii, Betula dahurica, Betula pendula, Pinus koraiensis, Pinus sibirica, Pinus sylvestris, Picea obovata, Abies sibirica, Quercus acutissima, Quercus mongolica, Ginkgo biloba, Prunus serrulata, Prunus padus, Tilia amurensis, Salix babylonica, Acer palmatum, Populus tremula, Ulmus davidiana, Ulmus pumila, Pinus pumila, Haloxylon ammodendron, Elaeagnus angustifolia, Tamarix ramosissima, Prunus sibirica , Cathaya argyrophylla , Taiwania cryptomerioides , Cyathea spinulosa , Sassafras tzumu , Davidia involucrata , Metasequoia glyptostroboides , Glyptostrobus pensilis , Castanea mollissima , Machilus thunbergii , Tetracentron , Cercidiphyllum japonicum , Emmenopterys henryi , Eucommia ulmoides , and himalayan birch ( Betula utilis ) form another common assemblage. Elsewhere mixed-conifer forests are made up of Abies spectabilis, blue pine ( Pinus wallichiana ) and spruce ( Picea smithiana ). Cupressus torulosa and Cedrus deodara are also found here.
A recently published major new monograph, Conifers Around the World, treats the high-level western Himalayan fir tree as Abies gamblei (apparently, Abies spectabilis does not reach this region!) [3]
Following are some notable conifers present in the area:
This ecoregion is home to some fifty-eight species of mammals. Important inhabitants include the brown bear and threatened or endangered species such as Himalayan serow, Himalayan tahr, and the markhor goat, the national symbol of Pakistan. The only endemic mammal is a rodent, the murree vole (Hyperacrius wynnei).
About 285 species of birds have been recorded in this ecoregion, including 9 endemic species and a number of birds that are sensitive to habitat disturbance and therefore likely to be vulnerable to further forest clearance. These include the Koklass pheasant (Pucrasia macrolopha), western tragopan (Tragopan melanocephalus), and the Himalayan monal (Lophophorus impejanus).
Despite being relatively thinly populated some seventy percent of the conifer forest has been cleared or degraded, partly to make way for terrace cultivation. However it still contains some of the least disturbed forests in the western Himalayas. Protected areas that contain areas of conifer forest include Great Himalayan National Park and Rupi Bhabha Sanctuary in Himachal Pradesh, Kishtwar National Park in Jammu and Kashmir, Gangotri National Park and Govind Pashu Vihar Wildlife Sanctuary in Uttarakhand, all in India, and Royal Dhorpatan Hunting Reserve in Nepal. A particular threat comes from disturbance of nesting birds during the collection of morel mushrooms in spring.
Extraction of firewood for heating among rural populations in Pakistan has degraded forests at some locations. [6]
The Eastern Highlands moist deciduous forests, presently known as East Deccan moist deciduous forests, is a tropical and subtropical moist broadleaf forests ecoregion in east-central India. The ecoregion covers an area of 341,100 square kilometers (131,700 sq mi), extending across portions of Andhra Pradesh, Chhattisgarh, Jharkhand, Madhya Pradesh, Maharashtra, Odisha, and Telangana states.
The Northeast India-Myanmar pine forests is a montane subtropical coniferous forest ecoregion in the mountains of Northeastern India and adjacent portions of Myanmar.
The Caucasus mixed forests is a temperate broadleaf and mixed forests ecoregion in the Caucasus Mountains, as well as the adjacent Lesser Caucasus range and the eastern end of the Pontic Mountains.
The Himalayan subtropical broadleaf forests is an ecoregion that extends from the middle hills of central Nepal through Darjeeling into Bhutan and also into the Indian States of Uttar Pradesh and Bihar. It represents the east–west-directed band of subtropical broadleaf forest at an altitude of between 500 and 1,000 m along the Outer Himalayan Range, and includes several forest types traversing an east to west moisture gradient.
The Eastern Himalayan broadleaf forests is a temperate broadleaf forest ecoregion found in the middle elevations of the eastern Himalayas, including parts of Nepal, India, Bhutan, Myanmar and China. These forests have an outstanding richness of wildlife.
The Western Himalayan broadleaf forests is a temperate broadleaf and mixed forest ecoregion which is found in the middle elevations of the western Himalayas, including parts of Nepal, India, and Pakistan.
The Eastern Himalayan subalpine conifer forests is a temperate coniferous forests ecoregion which is found in the middle and upper elevations of the eastern Middle Himalayas, in western Nepal, Bhutan, northern Indian states including Arunachal Pradesh and Sikkim and adjacent Myanmar and China.
The Northeastern Himalayan subalpine conifer forests are a temperate coniferous forests ecoregion of the middle to upper elevations of the eastern Himalayas and southeast Tibetan Plateau. The ecoregion occurs in southeastern Tibet Autonomous Region, China, in northern and eastern Arunachal Pradesh, India, and extreme eastern Bhutan.
The Qionglai-Minshan conifer forests are a World Wide Fund for Nature ecoregion in Southwest China. These forests are classified as temperate coniferous forests and are part of the Palearctic realm.
The Nujiang Lancang Gorge alpine conifer and mixed forests are a temperate coniferous forests ecoregion in Southwest China and northeastern Myanmar. The forests cover mountains and valleys in the western Hengduan Mountains and because of the extreme topography and relative remoteness, remain one of the best preserved habitats in China.
The Qilian Mountains Conifer Forests ecoregion is an ecoregion that consists of a series of isolated conifer forests on the northern slopes of the Qilian Mountain Range, on the northeast edge of the Tibetan Plateau in Qinghai and Gansu provinces of north-central China.
The Tian Shan montane conifer forests ecoregion covers the "forest belt" of the Tian Shan mountains - generally the north-facing slopes that get enough moisture, and are warm enough, for trees to grow. This conifer belt is found mostly between 1,500 and 2,700 meters.
The Tian Shan foothill arid steppe ecoregion covers the northern and western approaches to the Tian Shan mountains, centered on Lake Issyk-Kul in Kyrgyzstan. This region receives more moisture from Central Asia, thereby supporting more vegetation and diversity of plant and animal species than the deserts to the south.
The Changbai Mountains mixed forests ecoregion covers the Changbai Mountains and surrounding foothills in China and North Korea. The region features extensive and naturally preserved deciduous and conifer forests. The region exhibits high biodiversity due to its relative isolation, temperate climate with high rainfall, and centrality to central Chinese, Siberian, and European floral communities. In 1979, a significant portion of the ecoregion was designated the Changbaishan Biosphere Reserve by UNESCO.
The Gissaro-Alai open woodlands ecoregion covers the western foothills winding around two western offshoots of the Tian Shan Mountains in western Tajikistan, and parts of eastern Uzbekistan and western Kyrgyzstan, in Central Asia. The woodlands are typically of Juniper trees and shrubs, fitting the altitude zone situated between the desert valley floor, and the tree line, above which the mountain ridges are glaciated and barren.
The Hokkaido montane conifer forests ecoregion covers the mountainous central regions of Hokkaido Island, the northernmost of Japan's main islands. Forests of spruce and fir thrive in the subalpine, cool climate. On the northeastern edge of the island, the conifer forests extend down to the sea under the influence of the cold Oyashio Current coming down from the north, although logging in recent years has put pressure on these stands.
The East Afghan montane conifer forests ecoregion covers a series of unconnected conifer forests along the border between Afghanistan and Pakistan, at elevations of 2,000 metres (6,600 ft) to 3,400 metres (11,200 ft) above sea level. The ecoregion supports the near-threatened Markhor (Capra falconeri chiltanensis), known as the Screw-horned goat, the national animal of Pakistan. The forests of the ecoregion have been heavily thinned for timber.
The Central Afghan Mountains xeric woodlands ecoregion covers the xeric (dry) eastern and southern slopes of the central mountain range of Afghanistan, between the sandy desert to the south and the alpine meadows in the higher, wetter region to the north. Despite the 'woodlands' in the ecoregion name, very little of the territory is forested – less than 1% – but is instead sparse vegetation or herbaceous cover.
The Baluchistan xeric woodlands ecoregion covers the middle elevations of a series of mountain ranges of western Pakistan and northeastern Afghanistan, reaching 1,200 kilometres (750 mi) from the Arabian Sea in the south to the Hindu Kush Mountains and the Himalayas in the north. The characteristic vegetation is xeric (dry) woodlands of shrubs and herbaceous cover. The region has rich biodiversity but relatively few endemic species.