Actually there is a lot of good and bad is being introduced to Alaska of late. Plants that never were seen here are flourishing and along with the plants come bugs and insects and disease and with the warming climate more will come. By the way what would you call the moose that are ranging further north and the buffalo that are entering the forests. I know they used to be here but so did many other things that left, how about all of the different ethnic groups, it's a changing world.