East Siberian taiga

The East Siberian taiga in Siberia

The East Siberian taiga ecoregion, in the Taiga and Boreal forests Biome, is a very large biogeographic region in eastern Russia.

Setting

This vast ecoregion is located in the heart of Siberia, stretching over 20° of latitude and 50° of longitude^[1] (52 degrees north to 72 degrees north, and 80 degrees east to 130 degrees east). The climate in the East Siberian taiga is subarctic [i.e. tropical deciduous and coniferous] and displays high continentality, with extremes ranging from 40 °C (104 °F) to −62 °C (−80 °F). Winters are long and very cold, but dry, with little snowfall due to the effects of the Siberian anticyclone. Summers are short, but can be quite warm for the northerly location.

East Siberian taiga in the north of Khabarovsk Krai

Precipitation is low, ranging from 600 millimetres (24 in) to 200 millimetres (7.9 in), decreasing from east to west. The topography of this ecoregion is varied, consisting of wide, flat plains and areas of karst topography. In contrast to the neighbouring West Siberian taiga, large bogs and wetlands are conspicuously absent. Some trees also shed their leaves annually, a characteristic of deciduous forests.

Flora

Vegetation consists mainly of vast, dense forests of Dahurian Larch (Larix gmelinii), with Siberian Larch (Larix sibirica) and hybrid between the Dahurian and Siberian Larches (Larix x czekanowskii) occurring as one moves to the west. Cranberry (Vaccinium oxycoccus) and bilberry (Vaccinium myrtillus) bushes dominate the understory.

Throughout the ecoregion, smaller areas dominated by Siberian pine (Pinus sibirica), Scots pine (Pinus sylvestris), Siberian spruce (Picea obovata) and Siberian fir (Abies sibirica) can be found. Pine forests and deciduous forests composed of birch and poplar species become more common as one moves south, and at the headwaters of the Lena River and the Nizhnyaya Tunguska River, as well as in the Angara River basin, steppe and shrub-steppe communities can be found along with areas of forest-steppe.

Fauna

This region contains the highest number of brown bears (Ursus arctos collaris) and Eurasian wolf (Canis lupus) moose (Alces alces) and wild reindeer (Rangifer tarandus) in Russia. Further south mammals in the East Siberian taiga include Siberian musk deer (Moschus moschiferus), wapiti also known as Asian elk (Cervus canadensis) and wild boar (Sus scrofa). Birds of this ecoregion include the golden eagle (Aquila chrysaetos), peregrine falcon (Falco peregrinus), osprey (Pandion haliaetus), black stork (Ciconia nigra), hooded crane (Grus monacha), carrion crow (Corvus corone), the Siberian blue and rufous-tailed robins (Luscinia cyane and L. sibilans, respectively), the thrush nightingale (Luscinia luscinia), Pallas's rosefinch (Carpodacus roseus), Pacific swift (Apus pacificus) and Baikal teal (Anas formosa).

Conservation status, threats and protected areas

Although little of this ecoregion is protected, its conservation status is listed as "Relatively Stable/Intact". Protected areas include the Stolby, Olyokma, Tunguska and Central-Siberia zapovedniks (roughly "scientific nature reserves"). The main threats to this ecoregion's integrity are poaching and clear-cut logging in the southern and central portions of the region.

Classification

See also

• Tunguska event

References

• "East Siberian taiga". Terrestrial Ecoregions. World Wildlife Fund. 
• World Wildlife Fund (2001). "East Siberian taiga". WildWorld Ecoregion Profile. National Geographic Society. Archived from the original on 2010-03-08.