Geoscience Reference
In-Depth Information
8
Ice-Covered Lakes Environment
Saimaa ringed seal (
Pusa hispida saimensis
) in Lake Saimaa, Finland. Seals are very rarely seen in
lake environments. After the last ice age the Baltic Sea evolved through several phases where, due to
land upheaval, lakes with their ringed seal population were separated from marine
into freshwater basins. These relicts are still found from lakes Saimaa and Ladoga.
waters
and
turned
Photograph: Mr. Juha Taskinen, printed with permission.
c environment. Seasonally ice-covered lakes are com-
mon in a wide inhabited latitudinal zone in the northern hemisphere, while perennial lake
ice can be found only in some remote polar and high mountain locations. The ice cover
Ice-covered lakes form a speci
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