Northern transitional alpine forests | |
---|---|
Ecology | |
Realm | Nearctic |
Biome | temperate coniferous forests |
Borders | |
Bird species | 144 [1] |
Mammal species | 51 [1] |
Geography | |
Area | 25,641 km2 (9,900 sq mi) |
Country | Canada |
Provinces | British Columbia |
Conservation | |
Conservation status | Vulnerable |
Habitat loss | 0% [1] |
Protected | 1.57% [1] |
Northern transitional alpine forests is a temperate coniferous forest ecoregion in the northwestern interior of British Columbia, as defined by the World Wildlife Fund (WWF) categorization system.
This ecoregion occupies a transitional region of mountains and valleys between the Coast Ranges to the west and the Omineca Mountains to the east. It varies greatly in elevation from the heavily glacierized areas of the Hazelton and Skeena mountains between 2,500–2,800 m (8,200–9,200 ft), to the Nass and Skeena river valleys below 750 m (2,460 ft).
This ecoregion varies greatly depending on its proximity to the Pacific coast. In the west it has a warm humid continental climate (Köppen Dsb ) with warm summers and cold winters. In the east it has a subarctic climate (Köppen Dfc ) with cool summers and cold winters. Precipitation ranges from 2500mm (98.4 in) in the western coastal areas of the Nass River valley, to 600mm (23.6 in) in the lower elevations of the interior Bulkley Ranges. Temperature varies greatly with elevation, but averages around 13°C (55.4°F) in the summer and -9.5°C (14.9°F) in the winter.
The lower mountains and valleys are dominated by western red cedar, western hemlock, and mountain hemlock. Higher elevations are dominated by lodgepole pine, engelmann spruce, and alpine fir, though to a lesser extent in the west of the ecoregion. Vegetation in the alpine tundra includes discontinuous patches of low-growing heather, sedge, and mountain avens.
Fauna found throughout this ecoregion include grizzly bear, American black bear, moose, mountain goat, red fox, and wolves. Parts are also populated by woodland caribou, black-tailed deer, beaver, wolverine, marten, snowshoe hare, ptarmigan, and grouse.
The Great Basin Desert is part of the Great Basin between the Sierra Nevada and the Wasatch Range. The desert is a geographical region that largely overlaps the Great Basin shrub steppe defined by the World Wildlife Fund, and the Central Basin and Range ecoregion defined by the U.S. Environmental Protection Agency and United States Geological Survey. It is a temperate desert with hot, dry summers and snowy winters. The desert spans large portions of Nevada and Utah, and extends into eastern California. The desert is one of the four biologically defined deserts in North America, in addition to the Mojave, Sonoran, and Chihuahuan Deserts.
British Columbia mainland coastal forests is a temperate coniferous forest ecoregion the Pacific coast of North America, as defined by the World Wildlife Fund (WWF) categorization system.
The New England-Acadian forests are a temperate broadleaf and mixed forest ecoregion in North America that includes a variety of habitats on the hills, mountains and plateaus of New England and New York State in the Northeastern United States, and Quebec and the Maritime Provinces of Eastern Canada.
The Cascades ecoregion is a Level III ecoregion designated by the United States Environmental Protection Agency (EPA) in the U.S. states of Washington, Oregon, and California. Somewhat smaller than the Cascade mountain range for which it is named, the ecoregion extends north to Snoqualmie Pass, near Seattle, and south to Hayden Pass, near the Oregon-California border, including the peaks and western slopes of most of the High Cascades. A discontiguous section is located on Mount Shasta in California.
The Eastern Cascades Slopes and Foothills ecoregion is a Level III ecoregion designated by the United States Environmental Protection Agency (EPA) in the U.S. states of Oregon, Washington, and California. In the rain shadow of the Cascade Range, the eastern side of the mountains experiences greater temperature extremes and receives less precipitation than the west side. Open forests of ponderosa pine and some lodgepole pine distinguish this region from the Cascades ecoregion, where hemlock and fir forests are more common, and from the lower, drier ecoregions to the east, where shrubs and grasslands are predominant. The vegetation is adapted to the prevailing dry, continental climate and frequent wildfire. Volcanic cones and buttes are common in much of the region.
The Ecology of the North Cascades is heavily influenced by the high elevation and rain shadow effects of the mountain range. The North Cascades is a section of the Cascade Range from the South Fork of the Snoqualmie River in Washington, United States, to the confluence of the Thompson and Fraser Rivers in British Columbia, Canada, where the range is officially called the Cascade Mountains but is usually referred to as the Canadian Cascades. The North Cascades Ecoregion is a Level III ecoregion in the Commission for Environmental Cooperation's classification system.
The Central Pacific coastal forests is a temperate coniferous forest ecoregion located in the Canadian province of British Columbia and the U.S. states of Oregon and Washington, as defined by the World Wildlife Fund (WWF) categorization system.
The North Central Rockies forests is a temperate coniferous forest ecoregion of Canada and the United States. This region overlaps in large part with the North American inland temperate rainforest and gets more rain on average than the South Central Rockies forests and is notable for containing the only inland populations of many species from the Pacific coast.
The Altai montane forest and forest steppe ecoregion covers patches of the subalpine forest belt on the Altai Mountains, crossing the border region where Russia, Kazakhstan, Mongolia and China meet. The region has high biodiversity, as it is located in transition zones between different ecoregions, altitudes, and climate zones. It is in the Palearctic realm, with a Cold semi-arid climate. It covers 35,199,998 km2 (13,590,795 sq mi).
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).
The Changbai Mountains mixed forests ecoregion covers the Changbai Mountains and surrounding foothills in China and North Korea. The region features extensive and naturally preserved deciduous and conifer forests. The region exhibits high biodiversity due to its relative isolation, temperate climate with high rainfall, and centrality to central Chinese, Siberian, and European floral communities. In 1979, a significant portion of the ecoregion was designated the Changbaishan Biosphere Reserve by UNESCO.
The Qin Ling Mountains deciduous forests ecoregion covers the Qin Mountains, which run west-to-east across central China. The mountains effectively divide the biological regions of China into north and south. To the north is the Yellow River basin, a loess-soil region of temperate deciduous forests. To the south is the Yangtze River basic, a subtropical forest region. In between, the Qin Mountains support many rare and endemic species, including the Giant panda and the Sichuan snub-nosed monkey.
The Manchurian mixed forests ecoregion covers the forested hills surrounding the river plains of northern China, Russia, North Korea, and South Korea. The ecoregion supports a number of rare species due to the relative isolation, the diversity of habitat, with mixed forests of deciduous Mongolian oak and conifers of Korean pine. Because mountains rise above the region on three sides, with plains and wetlands below, the area supports high biodiversity as a transition zone.
Puget lowland forests is a temperate coniferous forest ecoregion the Pacific coast of North America, as defined by the World Wildlife Fund (WWF) categorization system.
The Central British Columbia Mountain forests is a temperate coniferous forest ecoregion in north-central British Columbia, as defined by the World Wildlife Fund (WWF) categorization system.
Pacific Coastal Mountain icefields and tundra is a tundra ecoregion in Alaska, British Columbia, and Yukon, as defined by the World Wildlife Fund (WWF) categorization system.
The Hindu Kush alpine meadow ecoregion covers a portion of the Hindu Kush Mountain Range in northern Afghanistan. Most of the terrain is between 3,000 and 4,000 meters in elevation. This portion of the Hindu Kush is very mountainous, with steep slopes. About half of the alpine meadow is bare rock or gravely soils with sparse vegetation. The remainder supports herbaceous cover of grasses and cushion plants. Human habitation is scarce and follows the river courses in the valleys.
Northern Cordillera forests is a taiga ecoregion that extends across the northern interior of British Columbia, southern Yukon, and a small area of the Northwest Territories as defined by the World Wildlife Fund (WWF) categorization system.
The Baluchistan xeric woodlands ecoregion covers the middle elevations of a series of mountain ranges of western Pakistan and northeastern Afghanistan, reaching 1,200 kilometres (750 mi) from the Arabian Sea in the south to the Hindu Kush Mountains and the Himalayas in the north. The characteristic vegetation is xeric (dry) woodlands of shrubs and herbaceous cover. The region has rich biodiversity but relatively few endemic species.
The Sulaiman Range alpine meadows ecoregion covers a series of higher altitude mountain ranges along the crest of the Sulaiman Mountains, a southerly extension of the Hindu Kush Mountains along the Afghanistan-Pakistan border. The area is relatively undeveloped, with about a third of the terrain either forested or in 'alpine steppe' shrub or herbaceous cover.