Transbaikal Bald Mountain tundra explained

Transbaikal Bald Mountain tundra
Map:Ecoregion PA1112.png
Map Alt:Ecoregion territory (in purple)
Ecozone:Palearctic
Biome:tundra
Area:217559
Countries:Russia
Coordinates:55.75°N 122.25°W

The Transbaikal Bald Mountain tundra ecoregion (WWF ID: PA1112) covers the high-altitude peak zones above the treeline in a series of mountain ranges that stretch from the northern reaches of Lake Baikal to the western coastal ranges of the Okhotsk Sea. Floral communities are those of mountain tundra, with bare rock or permafrost under layers of moss and lichen. Because the ecoregion is aligned along a common latitude, it acts as a route for the transmission of species across Siberia. The ecoregion is in the Palearctic realm and the tundra biome. It has an area of 217559km2.[1] [2] [3] [4] [5]

Location and description

The ecoregion stretches almost 1,800 km from west to east, forming a patchwork of sections that are mostly above 975m (3,199feet) in a series of mountain ranges from Lake Baikal to the Okhotsk Sea. This string of high-altitude zones roughly follows 56 degrees north latitude, and much of the tundra climate is due to altitude zoning. The individual mountain ranges include the Stanovoy Range and the Dzhugdzhur Mountains. The highest elevation is 2700m (8,900feet).[6]

Climate

The region has a Subarctic climate (Koppen classification Dwc). This climate is characterized by high variation in temperature, both daily and seasonally; with long, cold winters and short, cool summers with no month averaging over 22C; and with low levels of precipitation throughout the year. Mean precipitation in the Transbaikal bald mountain tundra region is about 121 mm/year. The mean temperature at the center of the ecoregion in January is -31.5C, and 15.8C in July.[7]

Flora and fauna

In general, the high peaks are bare rock at their highest, most windswept points. At lower elevations, moss and lichen form mats on the thin soil and permafrost.[2] Mammals in this zone include marmots, moose, and musk deer.

Protections

There are several significant nationally protected area that reach into this ecoregion:

Notes and References

  1. Web site: Trans-Baikal Bald Mountain tundra. GlobalSpecies.org. en. November 20, 2018.
  2. Web site: Trans-Baikal Bald Mountain tundra. World Wildlife Federation. en. November 20, 2018.
  3. Web site: Map of Ecoregions 2017. Resolve, using WWF data. en. September 14, 2019.
  4. Web site: M. . Kottek . J. . Grieser . C. . Beck . B. . Rudolf . F. . Rubel . 2006 . World Map of Koppen-Geiger Climate Classification Updated. Gebrüder Borntraeger 2006. en. September 14, 2019.
  5. Web site: Dataset - Koppen climate classifications. World Bank. en. September 14, 2019.
  6. Web site: TRANS-BAIKAL BALD MOUNTAIN TUNDRA. Joint Research Center - Digital Observatory for Protected Areas. en. January 1, 2019.
  7. Web site: Climate Data for Latitude 55.75 Longitude 122.25. GlobalSpecies.org. en. October 20, 2018.