Great Lakes Sinkholes Harbour Exotic Ecosystems
In Lake Huron, one of North America’s Great Lakes, sinkholes formed by water erosion host exotic organisms in what looks like an alien world.
Instead of the large fish common to the rest of the lake, the bizarre life forms that thrive in the lake’s sinkholes include purple cyanobacteria, ghostly floating pony-tails, and other organisms similar to those found in Antarctic sinkholes and deep-sea, hydrothermal vents.
“You have this pristine fresh water lake that has what amounts to materials from 400 million years ago … being pushed out into the lake,” says team co-leader Steven A. Ruberg of the Great Lakes Environmental Research Laboratory of the National Oceanic and Atmospheric Administration (NOAA).
