Species Spotlight: Beavers
Teeth marks on branches of wood near a creek might be the work of beavers. Beavers are notorious for chewing wood to make dams and to dull their teeth, and the bark provides them with nutrition.
Beavers have an interesting history. There are only two species of beavers that have not gone extinct: the North American beaver (Castor canadensis) and the Eurasian beaver (Castor fiber) (Schmidta). These beavers have adapted to live in today’s environment. They are semiaquatic rodents that are part of the mammalian family. They need to constantly chew on wood to dull their teeth because, unlike humans, their teeth do not stop growing! There was a time when beavers were heavily hunted for their fur, and their population dramatically decreased almost to extinction. However, since they have been protected, their population has steadily risen.
Today, beavers are typically seen as a nuisance because they cut down trees and their dams contribute to flooding. Despite this complicated relationship with humans, beavers have an important role in the ecosystem. Beavers are what’s known as a keystone species, meaning that they have a direct impact on other species around them. Their dams provide shelter for other animals and for some inspects.
|