Lake Superior other Great Lakes fish, populations have also been affected by the accidental or intentional introduction of foreign species such as the sea lamprey and Eurasian ruffe. Accidental introductions have occurred in part by the removal of natural barriers to navigation between the Great Lakes. Overfishing has also been a factor in the decline of fish populations. Lake Superior Lake Superior (; ), the largest of the Great Lakes of North America, is also the world's largest freshwater lake by surface area, and the third largest freshwater lake by volume. The lake is shared by the Canadian province of Ontario to
Lake Eber has been mostly dried up. Up to 1992, the most important problem was water pollution. However, in 1992 the lake was declared as Natural Protected Area. (). and it is slowly recovering. In October 2018 it was reported that the lake had dried out completely. http://www.hurriyetdailynews.com/photo-one-of-turkeys-largest-freshwater-lakes-dries-up-completely-due-to-drought-138057#photo-12 Lake Eber Lake Eber is a fresh water lake in Afyon Province, Turkey. The lake is between the district centers of Çay, Bolvadin and Sultandağı of Afyon Province. The midpoint is at about . The altitude of the water surface with respect to sea level is . The surface area fluctuates and at times