Question: The Kazan River flows through tundra and taiga, which is also known as what? 

full_context: Document 1: Temperate forest: Temperate forests correspond to forest concentration formed in the northern and southern hemisphere, or in temperate regions. It is the same as a tropical forest except for the climate and some of the animals adaptations. Main characteristics include: wide leaves, large and tall trees, large wild canopy and non seasonal vegetation. Temperate forests can be further distinguished by weather patterns and geographical features that favor the predominance of certain kinds of trees. In temperate coniferous forests, evergreen conifers predominate, while in temperate broadleaf and mixed forests, a more even distribution exists between evergreen trees and deciduous trees. Temperate deciduous forests, a subgroup of temperate broadleaf forests, consist of trees that lose their leaves every year. Finally, temperate rainforests typically have heavy rainfall and dense humidity. But in some temperate forests there are just trees with needles and do not shed their leaves during the winter, so the climate is a little different and not as cold. They are also known as montane forests.
Document 2: Whitemouth River: The Whitemouth River is located in southeastern Manitoba, Canada. The mouth of the river empties into the Winnipeg River system at the Whitemouth Falls Provincial Park. The Whitemouth River begins in a remote forested area just north of the border between the United States and Canada. Whitemouth Lake feeds the river year round, along with many wetlands throughout the Sandilands Provincial Forest area. The river runs north and crosses the Trans-Canada Highway where it enters an area of farmlands. There are many rapids along the river that make it a popular river to canoe on. The river is only about an hour from the city of Winnipeg. The towns of Seven Sisters, River Hills, Elma, Whitemouth, and Hadashville are located along the river.
Document 3: White Horse Rapids: The Whitehorse rapids were rapids on the Yukon River in Canada's Yukon Territory, named for their supposed resemblance to the mane of a charging white horse. The rapids formed where the Yukon River flows across and cuts down through lava flows of the Miles Canyon basalt. These rapids presented a major navigational obstacle on the Yukon River during the Klondike Gold Rush, and lent their name to the nearby town of Whitehorse.
Document 4: Spruce-fir forests: Fir and spruce forests are greatly affected by slight fluctuations in climate. Temperature is the primary determinate for spatial patterns of fir and spruce. The two dominant trees in this type of forest are "Picea engelmannii" (Engelmann spruce) and "Abies lasiocarpa" (subalpine fir). Although thick-barked trees, such as the "Pinus resinosa", frequently survive fire, the thin bark of spruce make them more vulnerable. Trees such as the Douglas fir withstand much of the fire due to the thicker bark they have. The scale of the burn mosaic during a fire, relative to species niche requirements and mobility, can have major impacts on flora and fauna dynamics.
Document 5: Tuchola Forest: The Tuchola Forest, also known as Tuchola Pinewoods, (literal translation of Polish: "Bory Tucholskie" ; Kashubian: "Tëchòlsczé Bòrë" ; German: "Tuchler or Tucheler Heide" ) is a large forest near the town of Tuchola ("Tucheln") in northern Poland, which lies between the Brda and Wda Rivers. It contains the Tuchola Forest National Park, which is at the core of the Tuchola Forest Biosphere Reserve, designated by UNESCO in 2010.
Document 6: Temperate coniferous forest: Temperate coniferous forest is a terrestrial biome found in temperate regions of the world with warm summers and cool winters and adequate rainfall to sustain a forest. In most temperate coniferous forests, evergreen conifers predominate, while some are a mix of conifers and broadleaf evergreen trees and/or broadleaf deciduous trees. Temperate evergreen forests are common in the coastal areas of regions that have mild winters and heavy rainfall, or inland in drier climates or mountain areas. Temperate coniferous forests are only found in the Northern Hemisphere in North America, Europe, and Asia. A separate ecoregion, the tropical coniferous forests, occurs in more tropical climates.
Document 7: Kazan River: The Kazan River (Inuktitut "Harvaqtuuq", Inuktitut syllabics ᓴᕐᕙᖅᑑᖅ; meaning "strong rapids", "the big drift" or "place of much fast flowing water"), is a Canadian Heritage River located in Nunavut, Canada. The Dene name for the river was Kasba-tue meaning “white partridge river.” The name was apparently changed to Kazan in the late 19th century due to the influence of Order of Mary Immaculate missionaries. The river headwaters are in northern Saskatchewan at Kasba Lake, and it flows north for about 1000 km (621 mi) before emptying into Baker Lake ( ), on the opposite side of the mouth of the Thelon River. Along its course the river flows through several lakes, including Ennadai Lake and Yathkyed Lake, over the Kazan Falls (25 m ), down a red sandstone gorge and through both boreal forest and tundra. It is the last section of the river, below Ennadai Lake, that is above the timber line and is designated a Canadian Heritage River.
Document 8: Taiga: Taiga ( ; Russian: тайга́ ; ] ; from Turkic) also known as boreal forest or snow forest, is a biome characterized by coniferous forests consisting mostly of pines, spruces and larches.
Document 9: Temperate rainforests of the Russian Far East: The temperate rainforests of the Russian Far East are found within the Russian states of Primorsky Krai and Khabarovski Krai and contains the Sikhote-Alin mountain range. Found within the Russian Federation, this area is one of the most productive and diverse forests in the world and also contains one of the highest endangered species densities on Earth. While most temperate rainforests around the world have retained only a fraction of their historical range, these forests maintain the majority of their former range and almost all of their historical biodiversity. The region is also notable for having what has become the last remaining large tract of viable habitat for the critically endangered Amur tiger and Amur leopard.
Document 10: Kautz Creek Falls: Kautz Creek Falls is a waterfall on Kautz Creek in the Mount Rainier National Park in the state of Washington. It was formed when the Kautz Glacier retreated in the last 50 years, creating a series of long and slender cascades totaling about 400 ft in height down a tall glacial cliff, with a highest drop of 150 ft . The falls consist of two parts, each with two distinct tiers. One of these parts flows from the upper lobe of the Kautz Glacier and disappears under the lower lobe. The water flowing over this stage is generally clear. As the water passes underneath the lower lobe, however; it has a muddy appearance caused by glacial moraine, which explains the muddy appearance of Kautz Creek.
Document 11: Southern Appalachian spruce–fir forest: The southern Appalachian spruce–fir forest is an ecoregion of the temperate coniferous forests biome, a type of montane coniferous forest that grows in the highest elevations in the southern Appalachian Mountains of the eastern United States.
Document 12: Kazan River: The Kazan River (Inuktitut "Harvaqtuuq", Inuktitut syllabics ᓴᕐᕙᖅᑑᖅ; meaning "strong rapids", "the big drift" or "place of much fast flowing water"), is a Canadian Heritage River located in Nunavut, Canada. The Dene name for the river was Kasba-tue meaning “white partridge river.” The name was apparently changed to Kazan in the late 19th century due to the influence of Order of Mary Immaculate missionaries. The river headwaters are in northern Saskatchewan at Kasba Lake, and it flows north for about 1000 km (621 mi) before emptying into Baker Lake ( ), on the opposite side of the mouth of the Thelon River. Along its course the river flows through several lakes, including Ennadai Lake and Yathkyed Lake, over the Kazan Falls (25 m ), down a red sandstone gorge and through both boreal forest and tundra. It is the last section of the river, below Ennadai Lake, that is above the timber line and is designated a Canadian Heritage River.
Document 13: Picea glauca: Picea glauca, the white spruce, is a species of spruce native to the northern temperate and boreal forests in North America. "Picea glauca" was originally native from central Alaska all through the east, across southern/central Canada to the Avalon Peninsula in Newfoundland. It now has become naturalized southward into the far northern United States border states like Montana, Minnesota, Wisconsin, Michigan, Vermont, New Hampshire and Maine; there is also an isolated population in the Black Hills of South Dakota and Wyoming. It is also known as Canadian spruce, skunk spruce, cat spruce, Black Hills spruce, western white spruce, Alberta white spruce, and Porsild spruce.
Document 14: Mackenzie River: The Mackenzie River (Slavey language: Deh-Cho [tèh tʃʰò], "big river" or Inuvialuktun: Kuukpak [kuːkpɑk], "great river") is the largest and longest river system in Canada, and is exceeded only by the Mississippi River system in North America. It flows through a vast, isolated region of forest and tundra entirely within the country's Northwest Territories, although its many tributaries reach into four other Canadian provinces and territories. The river's mainstem runs 1738 km in a northerly direction to the Arctic Ocean, draining a vast area nearly the size of Indonesia. It is the largest river flowing into the Arctic from North America, and with its tributaries is one of the longest rivers in the world.
Document 15: Takhini River: The Takhini River is a watercourse in Yukon, Canada. The river is located just north of Whitehorse, Yukon, and flows from west to east, meeting the Yukon River at a point between Whitehorse and Lake Laberge. During the winter, the river freezes and serves as part of the route of the Yukon Quest sled dog race.
ground_truth: boreal forest