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An estimated 30,000 brown bears live in Alaska. [3] Of that number, about 1,450 are harvested by hunters yearly. [4] Brown bears can be found throughout the state, with the minor exceptions of the islands west of Unimak in the Aleutians, the islands south of Frederick Sound in southeast Alaska, and the islands in the Bering Sea. [2]
These species are keystone because they have learned to adapt to the cold climate of the area and are able to survive year-round. These species survive year-round in taiga by changing fur color and growing extra fur. They have adapted to use each other to survive too. All of the predators depend on the snowshoe hare at some point during the year.
"In Alaska alone," Marshall wrote, "can the emotional values of the frontier be preserved." [4] In 1953, an article was published in the journal of the Sierra Club by then National Park Service planner George Collins and biologist Lowell Sumner titled "Northeast Alaska: The Last Great Wilderness". [8]
A National Park Service report on Alaska's glaciers noted glaciers within Alaska national parks shrank 8% between the 1950s and early 2000s and glacier-covered area across the state decreased by ...
Insects are at "the structural and functional base of many of the world's ecosystems." [6] A 2019 global review warned that, if not mitigated by decisive action, the decline would have a catastrophic impact on the planet's ecosystems. [6] Birds and larger mammals that eat insects can be directly affected by the decline.
The Arctic ground squirrel typically has a beige-tan pelage with a lightly-spotted backside. Similar to the related prairie dog, it has a shorter face than the typical arboreal squirrels–due to its lifestyle of burrowing–as well as smaller ears, with a dark tail and white markings around the eyes.
An Alpine chough in flight at 3,900 m (12,800 ft). Organisms can live at high altitude, either on land, in water, or while flying.Decreased oxygen availability and decreased temperature make life at such altitudes challenging, though many species have been successfully adapted via considerable physiological changes.
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