As U.S. West warms, beavers will become a bigger boon to river water quality. As climate change worsens water quality and threatens ecosystems, the famous dams of beavers may help lessen the damage, according to a new study by Stanford University scientists and colleagues. The research, which
A new study finds that when it comes to water quality in mountain watersheds, beaver dams can have a far greater influence than climate-driven, seasonal extremes in precipitation.As climate change worsens water quality and threatens ecosystems, the famous dams of beavers may help lessen the damage, according to a new study by Stanford University scientists and colleagues.
Beavers build dams and lodges using tree branches, vegetation, rocks, and mud. They are known to chew down trees for building materials. Beaver activity could help counter the damage from climate change on river water quality.The discovery of the profound impact of beaver dams came about serendipitously.
For the study, Dewey and colleagues reviewed data on water levels gathered hourly by sensors installed in the river and throughout the riparian area. The team also collected water samples, including from below the ground’s surface, to monitor nutrient and contaminant levels. Through their measurements and computer modeling of the interlinked biological, chemical, and physical processes that affect how contaminants become concentrated or flow downstream, the researchers found that the beaver dam dramatically increased removal of nitrate, a form of nitrogen, by creating a surprisingly steep drop between the water levels above and below the dam.
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