Tag: "beaver" at biology news

Beaver dams create healthy downstream ecosystems

...ream. Researchers have found that ponds created by beaver dams raised downstream groundwater levels in the C... Colorado River. They noted that water diverted by beaver dams is forced out of the natural stream channel and spreads across and down the valley for hundreds...

Wolves' top-down effect

Willow trees, riparian willow warblers and beaver dams once were bountiful in an area near the town ...also found that as elk populations climbed, active beaver lodges declined, probably because beavers could no longer find sufficient trees with which to build ...

Proposal would allow wild animals to roam North America

... As a result, along winter elk ranges in Colorado, beaver populations have declined by 80 to 90 percent. With fewer beavers to create dams that raise water tables, fewer wetlands developed to support willows. Today, there are 60 percent fewer willows in parts of Colorado where beavers have declined. Simila...

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