Arctic Coastlines Hitting Ecological Tipping Point

Arctic Coastlines Hitting Ecological Tipping Point: Along the rocky coastlines of the Arctic Ocean, a radical change is taking place, perhaps as profound as vanishing sea ice but less evident to the eye. Ecological foundations are shifting, with existing algae replaced by warmth- and light-loving species. It might not seem like much, but algae form the base of ocean food chains, and the change is happening fast.