caption: Impacts of a beaver dam on cottonwood recruitment. The top panel shows a beaver dam upstream of the confluence with Cottonwood Wash (note riparian ecologists for scale). Photo taken by <PERSON> on November 7, 2012. The bottom panel is a picture of the channel upstream of the beaver dam, looking upstream, taken by <PERSON> on October 12, 2012. As seen in the bottom panel, the dam backed up water in the channel and likely aided cottonwood recruitment in this area (shown in inset, taken by <PERSON> on October 12, 2012).