On-going ash decline and the emerald ash borer may pose serious risks to black ash in Wet Forests.

The ongoing decline in black ash documented in northern Minnesota already presents problems for the health of Wet Forests. It also seems very likely that the emerald ash borer will reduce the amount of black ash in northern Minnesota. This is particularly concerning for black ash swamps that don't contain many other species. If ash are removed, there is a risk that water tables will rise in these Wet Forests and they may not be able to maintain tree cover.