Sayan montane conifer forests
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.
Location and description
The ecoregion stretches some 2,500 km from the Kuznetsk Alatau mountains in the west, across the western and eastern Sayan Mountain ranges, to the southeastern shores of Lake Baikal. The ecoregion covers the forested mid-altitudes of the mountains, with a lower bound ranging from 600 to 900 meters about sea level, and an upper bound of 1,800 meters. This ecoregion is one of high biodiversity, due to its position on the meeting lines of climate and floral zones, and the many micro-climates created by the mountainous terrain and steep river valleys.Climate
Because of its altitude and distance from the ocean, the ecoregion has a subarctic climate. This indicates a continental climate characterized by short, cool summers, and very cold, long winters, with wide differences between day and night temperatures. This region is also heavily influenced by the high barometric pressures over Mongolia. The Altai mountains on the west of the ecoregion capture humidity in the winds from the west; precipitation is accordingly higher on the western side of the ecoregion than the drier east.Flora and fauna
The mid-altitude forest belt can be divided into three sub-zones. The highest is the 'Light Needle-Leaf Sparse Taiga' zone, an open canopy forest of Larix sibirica, with notable shrub and grass layers. The 'Dark Needle-Leaf Taiga' zone if dominated by Abies sibirica and stands of Pinus sibirica and Picea obovata. The 'dark taiga' zone has the same trees as the middle sub-zone, but more vertically developed shrub and grass layers, and richer soil. Over 800 species of flora are recorded in the ecoregion.Protections
Officially protected areas in the region include:- Altai Nature Reserve. An IUCN class Ia "strict ecological reserve" located in the north and east of Altai Republic. .
- Baikal Nature Reserve. An IUCN class Ia "strict ecological reserve" located on the southeast shore of Lake Baikal and the neighboring central part of the Khamar-Daban Range, in southern Buryatia. .
- Khakassia Nature Reserve. An IUCN class Ia "strict ecological reserve" covering two large mountain areas, and a cluster of seven steppe sites located within the left bank of the Minusinsk Hollow. .
- Kuznetsk Alatau Nature Reserve. An IUCN class Ia "strict ecological reserve" located on the Kuznetsky Alatau, a mountain ridge in the Altai-Sayan mountain region in southwestern Siberia, in the watershed of the Tom River and the Chuly River. .
- Sayano-Shushenski Nature Reserve. An IUCN class Ia "strict ecological reserve" located in a remote area of the West Sayan Mountains of south Siberia, on the southern bank of the Yenisei River along the Sayano-Shushenskoye reservoir. .
- Shorsky National Park. An IUCN class Ia "strict ecological reserve" located where the West Siberian Plain meets the South Siberian Mountain. .
- Shushensky Bor National Park. An IUCN class Ia "strict ecological reserve" located in the extreme southwest of Siberia, in the northern foothills of the Western Sayan Mountains. .
- Tunkinsky National Park. An IUCN class Ia "strict ecological reserve" located in a mountainous region centered on the Irkut River valley that continues from the rift valley of Lake Baikal southwest to the border of Mongolia. .
- Ubsunur Hollow Biosphere Reserve. An IUCN class Ia "strict ecological reserve" located a fragile mountain hollow or depression located on the territorial border of Mongolia and the Republic of Tuva in the Russian Federation among the mountains — Tannu-Ola Mountains, and the Altay Mountains region. .
- Lake Khövsgöl National Park. The park covers territory surrounding Lake Khovsgul, the largest freshwater lake in Mongolia.
- Tengis-Shishged National Park. Covers the lower Shishged River as if flows west from the Darkhad Valley in northern Mongolia. The landscape is one of high peaks with steep sides and wide glaciated valleys.