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A beaver dam or beaver impoundment is a dam built by beavers; it creates a pond which protects against predators such as coyotes, wolves and bears, and holds their food during winter. These structures modify the natural environment in such a way that the overall ecosystem builds upon the change, making beavers a keystone species and ecosystem ...
Dams can range in height from 20 cm (7.9 in) to 3 m (9.8 ft) and can stretch from 0.3 m (1 ft 0 in) to several hundred meters long. Beaver dams are more effective in trapping and slowly leaking water than man-made concrete dams. Lake-dwelling beavers do not need to build dams. [59] Open-water beaver lodge in Canada
Beaver dam in Tierra del Fuego [1] The North American beaver ( Castor canadensis ) is an invasive species in Tierra del Fuego , at the southern end of Patagonia . Tierra del Fuego is a large island encompassing parts of Chile and Argentina , so that policies and actions to control the species have mainly been binational.
In 2014, a review of beaver dams as stream restoration tools proposed that an ecosystem approach using riparian plants and beaver dams could accelerate repair of incised, degraded streams versus physical manipulation of streams. [61] The province of Alberta published a booklet in 2016 providing information on using beaver for stream restoration ...
Beaver Dam and its spillway and powerhouse.. Beaver Dam was authorized by the Flood Control Act of 1944 and other following acts. The United States Army Corps of Engineers constructed Beaver Dam during the years 1960–1966, impounding a major part of the White River and creating Beaver Lake and flooding much of the valley including the remains of the historic resort town Monte Ne.
The Edersee Dam in Hesse, Germany. A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use, aquaculture, and navigability.
[22] After the restoration, native North American beaver returned to the area, establishing 3-4 beaver dams. [18] These keystone species have been shown to increase fish, bird and mammal abundance and diversity in California rivers and streams. They also benefit trout and salmon by reducing sediment loads and improve water quality. [23]
The Eurasian beaver (Castor fiber) or European beaver is a species of beaver widespread across Eurasia, with a rapidly increasing population of at least 1.5 million in 2020. The Eurasian beaver was hunted to near-extinction for both its fur and castoreum , with only about 1,200 beavers in eight relict populations from France to Mongolia in the ...