Lake Ioni (Russian: Иони), also known as Yonai (Russian: Ёонай), (Chukot: Юнин, Yunin) is a large freshwater lake in Chukotsky District, Chukotka Autonomous Okrug, Russia.[1] It has an area of 27.8 km2 (10.7 sq mi).[2] Currently there are no permanent settlements on the shores of the lake, but there are remains of Stone Age dwellings.[3]Reindeer herders occasionally visit the area, as well as fishermen. The nearest inhabited place is Lorino, located 102 km (63 mi) away.[1]
Ioni is fed by at least five streams originating in the adjacent mountains. The largest is the Priozernaya that flows into the lake from the northeast. River Yonaypilgyn is the outflow of the lake. Ioni is connected by the Yuniwei channel with river Ioniveyem, part of the drainage basin of Kolyuchin Bay.[1]
The lake freezes in the first half of September and stays under ice until June.[4]
Flora and fauna
The area surrounding Ioni has low mountain tundra vegetation. The banks of the lake are gently sloping and on the eastern side swampy with hummocks and thermokarst pools. There are no aquatic plants.
Migratory birds, such as the snow goose, sandhill crane and emperor goose pass through the area and stop at the lake. But owing to the short relatively warm season Ioni is not a suitable place for nesting.[6]