Great Slave Lake ecosystem.

Great Slave Lake, ensconced in the boreal forest and undulating tundra of Canada's Northwest Territories, is the deepest lake in the continent, plumbed to a depth of 2,015 feet (614 meters). Except for the remnant (and some ongoing) contamination from mining on its northern shore and disruption from logging and road construction, Great Slave Lake anchors an almost pristine series of habitats, with intact forests, wetlands, shrublands, and tundra surrounding its clean, often ice-covered waters.