LANSING, MI – Beavers are considered ecological architects, but certain conservationists are worried there can be too many in some areas of Michigan. State wildlife and fisheries managers recently heard from multiple trout fishery advocates raising concerns about what they argue is an overabundance of beavers living in Michigan’s wilderness. The trouble is that trout species require cold, swiftly moving waters to thrive, but too many beaver dams in a stream may slow the water and raise its temperatures, driving the trout away.