Action: Introduce beavers to impede water flow in forest watercourses
Key messagesRead our guidance on Key messages before continuing
- We found no evidence for the effects of introducing beavers to impede water flow in forest watercourses on forests.
'No evidence' for an action means we have not yet found any studies that directly and quantitatively tested this action during our systematic journal and report searches. Therefore we have been unable to assess whether or not the action is effective or has any harmful impacts. Please get in touch if you know of such a study for this action.
By constructing dams, beavers can obstruct water flow and can increase the water level. This may alter the species composition of forests in favour of species that can cope with high water levels.