Hengduan Mountains
Minya Konka Northwest Ridge.JPG
Mount Gongga, the tallest summit in the Hengduan Mountains
Highest point
PeakMount Gongga
Elevation7,556 m (24,790 ft)
Geography
CountriesChina and Burma
Range coordinates27°30′N 99°00′E / 27.5°N 99°E / 27.5; 99Coordinates: 27°30′N 99°00′E / 27.5°N 99°E / 27.5; 99
Three Parallel Rivers region - heart of Hengduan Shan - relative to South, Southeast and East Asia.
Three Parallel Rivers region - heart of Hengduan Shan - relative to South, Southeast and East Asia.
Larger scale political / relief map of area (Hengduan Shan / Three Gorges region top centre).
Larger scale political / relief map of area (Hengduan Shan / Three Gorges region top centre).
Map of East Asia, showing location of Hengduan Mountains (with particular reference to their coniferous forests) and their only major settlement Lijiang, Yunnan Province.
Map of East Asia, showing location of Hengduan Mountains (with particular reference to their coniferous forests) and their only major settlement Lijiang, Yunnan Province.
Satellite view of the Hengduan Mountains
Satellite view of the Hengduan Mountains

The Hengduan Mountains (simplified Chinese: 横断山脉; traditional Chinese: 橫斷山脈; pinyin: Héngduàn Shānmài) are a group of mountain ranges in southwest China that connect the southeast portions of the Tibetan Plateau with the Yunnan–Guizhou Plateau. The Hengduan Mountains are primarily large north-south mountain ranges that effectively separate lowlands in northern Myanmar from the lowlands of the Sichuan Basin. These ranges are characterized by significant vertical relief originating from the Indian subcontinent's collision with the Eurasian Plate, and further carved out by the major rivers draining the eastern Tibetan Plateau. These rivers, the Yangtze, Mekong, and Salween, are recognized today as the Three Parallel Rivers UNESCO World Heritage Site.

The Hengduan Mountains cover much of western present-day Sichuan province as well as the northwestern portions of Yunnan, the easternmost section of the Tibet Autonomous Region, and touching upon parts of southern Qinghai. Additionally, some parts of eastern Kachin State in neighbouring Myanmar are considered part of the Hengduan group. The Hengduan Mountains are approximately 900 kilometres (560 mi) long, stretching from 33°N to 25°N. Depending on extent of the definition, the Hengduan Mountains are also approximately 400 kilometres (250 mi) wide under the narrowest definition, ranging from 98°E to 102°E. The area covered by these ranges roughly corresponds with the historical region known as Kham.

The Hengduan Mountains subalpine conifer forests is a palaearctic ecoregion in the Temperate coniferous forests biome that covers portions of the mountains.

Geography

A bird's-eye view of the "Nujiang 72 turns" in Tibet.
A bird's-eye view of the "Nujiang 72 turns" in Tibet.

The Hengduan Mountain system consists of many component mountain ranges, most of which run roughly north to south. These mountain ranges, in turn, can be further divided into various subranges. The component ranges of the Hengduan are separated by deep river valleys that channel the waters of many of Southeast Asia's great rivers.[1] The core of the Hengduan Mountains can be divided into four major component ranges, described below.[2]

Ecosystems

The Hengduan Mountains support a range of habitats, from subtropical to temperate to montane biomes. The mountains are largely covered by subalpine coniferous forests.[4][5] Elevations range from 1,300 to 6,000 metres (4,300 to 19,700 ft). The dense, pristine forests, the relative isolation, and the fact that most of the area remained free from glaciation during the ice ages provides a very complex habitat with a high degree of biological diversity.

The ecoregions that coincide with the Hengduan Mountains are:

Additionally, the lowest elevation portions of the Jinsha (Yangtze) River and Nu (Salween) River valleys in the southern Hengduan ranges are classified by the Chinese government as a tropical savanna environment, but this has not been recognized by the WWF.[6]

The easternmost ranges of the Hengduan are home to the rare and endangered giant panda. Other species native to the mountains are the Chinese yew (Taxus chinensis) and various other rare plants, deer, and primates.

Gallery

See also

References

  1. ^ Virginia Morell (April 2002). "China's Hengduan Mountains". National Geographic. Retrieved 28 June 2015.
  2. ^ Atlas of China. Beijing, China: SinoMaps Press. 2006. ISBN 9787503141782.
  3. ^ "Sichuan and Yunnan Provinces". Peaklist. Retrieved 2017-03-12.
  4. ^ "Nujiang Langcang Gorge alpine conifer and mixed forests". Terrestrial Ecoregions. World Wildlife Fund.
  5. ^ http://researcharchive.calacademy.org/research/cnhp/glgs/PDF/ChaplinG.2005_opt.pdf Physical Geography of the Gaoligong Shan Area of Southwest China in Relation to Biodiversity
  6. ^ National Physical Atlas of China. Beijing, China: China Cartographic Publishing House. 1999. ISBN 7503120401.