A Caddisflies Dilemma
- These caddisflies seem to accumulate every year within some small rivulets leaving from beaver ponds near Mendenhall Lake in Juneau, Alaska.
- The small streams have a sandy bottom and the caddisflies cannot seem to grip the substrate in the current.
- So they tend to accumulate in the deeper water areas.
- Why they are there and where they come from is a project we are working on.
- Do they normally live in Mendenhall Lake (a glacial lake) and get caught in this area as the lake level lowers in the fall.
- Or do they normally live in the beaver pond and move past the dams and cannot return.
- They belong to the family called Northern Case Makers.
- An entomologist at UAA in Anchorage has identified them as belonging to the genus Lenarchus
- Hopefully we will eventually be able to put together the full story about why they are in this area.