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3 maj 2022 · This time series analysis demonstrates the northward and westward colonization of Arctic tundra streams, rivers, and lakes by beavers since 1949. Once beaver engineering appeared in the 1970s...
The Arctic has long been home to species that are well-adapted to the region’s cold, harsh conditions—from polar bears and caribou to narwhals and ringed seals. But now these species have a new neighbour: the beaver. And its appearance in Alaska could have significant consequences for ecosystems and biodiversity.
The beaver (Castor canadensis) is a semiaquatic rodent known for its large size, distinctive flat tail, and remarkable ability to construct elaborate dams and lodges using branches and mud. This species is also known as: American Beaver. Share this!
Beaver engineering dramatically altered a tundra stream on the Seward Peninsula in western Alaska between 2003 and 2016. The enlarged black areas are new beaver ponds, the blue arrow shows flow direction, and magenta arrows denote dams.
16 paź 2019 · In Alaska, beavers are moving north from the forests into the Arctic tundra. When beavers build dams in the Arctic, they cause frozen soil, called permafrost, to thaw. Scientists are studying how beavers and the thawing of permafrost are impacting streams and rivers in Alaska’s national parks.
Distribution of the beaver (Castor canadensis). Modifications of the range map by Deems and Pursley (1978) include populations in Mexico, southern California, west-central Florida, and Delaware and the absence of beaver in the North Slope of Alaska.
21 gru 2021 · In western Alaska, research has shown that beavers are the dominant factor in almost two thirds (66%) of cases where surface water has increased.
