Daurian forest steppe

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Daurian Forest steppe
Uchastok Adon-Chelon.JPG
Daursky Nature Reserve in the ecoregion
Ecoregion PA0804.png
Ecoregion territory (in purple)
Ecology
Realm Palearctic
Biome temperate grasslands, savannas, and shrublands
Geography
Countries

The Daurian forest steppe ecoregion (WWF ID: PA0804) is a band of grassland, shrub terrain, and mixed forests in northeast Mongolia and the region of Siberia, Russia that follows the course of the Onon River and Ulz River, and part of the northwestern China. The region has been described as a "sea of grass that forms the best and most intact example of an undisturbed steppe ecosystem and is also one of the last areas in the Palearctic that still supports stable herds of larger vertebrates" in a semi-mountainous area. [1] The area also has flat wetlands that are important to migratory birds. The ecoregion is in the Palearctic realm, with a dry-winter subarctic climate (Köppen Dwc) that borders on a very cold semi-arid climate (BSk) in its southwestern parts. It covers 209,012 km2 (80,700 sq mi). [2]

Contents

Location and description

The ecoregion circles around half of the Khentii Mountains, then stretches over 1,000 kilometers east of Ulan Bator into northeasteastern Mongolia through the semi-arid region south and east of Chita, Zabaykalsky Krai, Russia. A prominent feature is the Onon River flowing east through mid-sized mountains (1,400 - 1,800 meters in height) to the Amur River. [3] [4]

Climate

Because of its altitude, distance from the ocean, and proximity to the cold Siberian High, the ecoregion has a subarctic climate (Köppen climate classification Dwc), bordering on a very cold semi-arid climate (BSk) in the southwest. This indicates a continental climate characterized by short, pleasant summers, and very dry, long and frigid winters, with wide differences between day and night temperatures. Mean temperatures range from −30 °C or −22 °F (January) to 24 °C or 75.2 °F (August). Average annual precipitation is between 250 millimetres or 10 inches in the west and 450 millimetres or 18 inches in the east, with almost all falling in the warmer months between May and September.

Climate at 49.75 N, 112.75 E
Climate chart (explanation)
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Average max. and min. temperatures in °F
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Source:GlobalSpecies.org [5]
Metric conversion
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Flora and fauna

The steppe lands of the ecoregion are characterized by sedges (genus Carex ) and grasses (family Poaceae), forming meadow steppe, herbs steppe and sandy saltmarsh steppe. Along the lake shores are salt-dependent plants and reed beds. The forests of the area are mostly Asian black birch (Betula dahurica), Scots pine (Pinus sylvestris), and Siberian larch (Larix sibirica). European aspen groves are found in some mountain areas.

Herds of Mongolian Gazelle (Procapra gutturosa) roam the grasslands of the region, which is at the northern edge of their territory. The broken terrain of mountains and ravines support small mammals, including the Lesser white-toothed shrew (Crocidura sauveolens), Eurasian harvest mouse (Micromys minutus), and Maximowicz's vole (Microtus maximowiczii). Predators include the wolf, polecat, Eurasian badger, and Pallas's cat (Otocolobus manul).

Protections

The federally protected areas in the region are:

See also

Related Research Articles

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<span class="mw-page-title-main">Borzya</span> Town in Zabaykalsky Krai, Russia

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<span class="mw-page-title-main">Sayano-Shushenski Nature Reserve</span> Nature reserve in Krasnoyarsk Krai, Russia

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<span class="mw-page-title-main">Da Hinggan–Dzhagdy Mountains conifer forests</span> Ecoregion in the Khingan Mountains

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<span class="mw-page-title-main">Sayan montane conifer forests</span> Coniferous forests in Russia and Mongolia

The Sayan montane conifer forests ecoregion covers the mid-elevation levels of the Sayan Mountains, the high mountain range between the taiga of Siberia, Russia to the north, and the steppes of Mongolia to the south. The slopes of the mountains at the mid-altitudes are covered by Temperate coniferous forest. The ecoregion is in the Palearctic realm, with a cold semi-arid climate. It covers 35,741,835 km2 (13,800,000 sq mi).

<span class="mw-page-title-main">South Siberian forest steppe</span>

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<span class="mw-page-title-main">Sayan intermontane steppe</span>

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<span class="mw-page-title-main">Selenge–Orkhon forest steppe</span> Ecoregion in Mongolia

The Selenge–Orkhon forest steppe ecoregion stretches across north central Mongolia, and follows the Selenga River northeast into Russia. The ecoregion is itself at high elevations, but surrounded by higher mountain ranges. As a transition zone between taiga and steppe, it features conifer forests on the north slopes of mountains, and pine/aspen stands on southern slopes. It has an area of 227,660 square kilometres (87,900 sq mi).

<span class="mw-page-title-main">Onon-Balj National Park</span> National Park of Mongolia

Onon-Balj National Park covers two sectors of the Onon River valley as it flows north from Mongolia into Russia. The region is in the transition zone between the Siberian conifer forests of the north and the Daurian steppe and forest steppe of Mongolia. The area is one of relatively high biodiversity, and is also historically and culturally important for its association with Genghis Khan. The park is located in the far northeast of Khentii Province, 280 km northeast of Ulaanbaatar.

<span class="mw-page-title-main">Kodar National Park</span>

Kodar National Park is located in Kodar Mountains of Russia, about 500 km northeast of Lake Baikal. The park encompasses extreme variations in terrain: precipitous alpine slopes, over 570 alpine lakes, low-altitude glaciers, volcanoes, and an isolated small desert surrounded by taiga forest. The park was officially created in 2016. The park is located in the administrative district of Kalarsky District, Zabaykalsky Krai.

References

  1. "Daurian forest steppe". Encyclopedia of Earth.
  2. "Daurian forest steppe". Ecoregions of the World. GlobalSpecies.org. Archived from the original on June 24, 2018. Retrieved June 22, 2018.
  3. "Eastern Asia: China, northeastern Mongolia, and Russia". World Wildlife Federation. Retrieved June 22, 2018.
  4. ""Dauria"". Amur Information Center. Retrieved June 22, 2018.
  5. "Climate, 49.75/112.75". GlobalSpecies.org. Archived from the original on June 24, 2018. Retrieved June 22, 2018.
  6. "Landscapes of Dauria".