Gobi Lakes Valley desert steppe

The Gobi Lakes Valley desert steppe ecoregion (WWF ID:PA1315) covers the narrow, flat valley in southwestern Mongolia that lies between the Khangai Mountains (to the north), and the Gobi-Altai Mountains (to the south). The region is known as the "Valley of the Lakes" because runoff from the mountains collect in lakes that have no outlet to the sea. Although the valley is a semi-arid desert steppe, it has areas of wetlands near the lakes that are important habit for water birds.[1][2][3]

Ecoregion: Gobi Lakes Valley desert steppe
Albino camel in Bayankhongor Province, Mongolia
Ecoregion territory (in yellow)
Ecology
RealmPalearctic
BiomeDeserts and xeric shrublands
Geography
Area139,341 km2 (53,800 sq mi)
CountryMongolia
Coordinates45°50′N 101°0′E

Location and description

The Gobi Lakes Valley is about 500 km west-to-east, and 150 km north-to south, at elevations of 1,000-1,400 meters.[2] The region is desert steppe, with rivers from the Khangai Mountains on the north providing most of the water to the lakes. On the south the region is bounded by the Gobi-Altai range, the easternmost extension of the Altai. A chain of shallow, saline lakes include Böön Tsagaan Lake (Lake Buuntsaagan), Taatsiin Tsagaan Lake, Adgiin Tsagaan Nuur, and Lake Orog. The lake's depths fluctuate with the variable precipitation. Some have large wetlands where the waters recede.

Lake Buuntsaagan from the air

Climate

The climate of the ecoregion is Cold semi-arid climate (Köppen climate classification BSk). This climate is characteristic of steppe climates intermediary between desert humid climates, and typically have precipitation is above evapotranspiration. At least one month averages below 0 °C (32 °F).[4][5] Annual precipitation ranges from 50 to 200 mm.[2]

Flora and fauna

Dominant plants of the desert steppe include feather grass (Stipa gobica), wild onion (Allium polyrhizum), anabasis, and ajania. Around the lakes are shrubs such as Caragana and salt-tolerant Salsola and saxaul (Haloxylon ammodendron).[1] Water birds in the wetlands include the great cormorant, greylag goose, ruddy shelduck, mallard and Eurasian coot.[2] Small mammals throughout the region include the midday jird, Gobi jerboa (a rodent of temperate grasslands and deserts), winter white dwarf hamster, and long-eared hedgehog (Erinaceus).

See also

References
  1. "Valley of the Lakes". Ramsar Sites Information Service. Retrieved April 13, 2020.
  2. "Gobi Lakes Valley desert steppe". World Wildlife Federation. Retrieved March 21, 2020.
  3. "Map of Ecoregions 2017". Resolve, using WWF data. Retrieved September 14, 2019.
  4. Kottek, M., J. Grieser, C. Beck, B. Rudolf, and F. Rubel, 2006. "World Map of Koppen-Geiger Climate Classification Updated" (PDF). Gebrüder Borntraeger 2006. Retrieved September 14, 2019.CS1 maint: multiple names: authors list (link)
  5. "Dataset - Koppen climate classifications". World Bank. Retrieved September 14, 2019.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.