Fresh Water (?)

Most of the lakes in North America were created by the glaciers thousands of years ago. In some cases, glacial action scraped out the lake bed; in other locations, glacial deposits formed a natural dam across a river bed. The most productive habitat associated with lakes is usually the wetlands on their edges, but lakes also provide a home for aquatic plants and animals, which in turn provide food for other animals. Problems with the quality of water in a lake has a domino effect so that larger animals, like the bald eagle and osprey (and even ourselves) are effected much more than the smaller living things that live in the lake.
Pink Lake This is Pink Lake in Gatineau Park. It was named after somebody named Pink. An unusual lack of circulation ibetween the layers of water in this lake has resulted in oxygen depletion which is the root cause of its striking green colour.
High nutrient content in a lake can lead to the formation of a bog as the lake fills up with aquatic plant material.

Larger lakes can also modify the climate in nearby areas. They provide a source of moisture for rain or snow. Also, water absorbs heat and then re-releases it relatively slowly.

As water cools, it becomes more dense until 4 degrees Celsius, at which point, it becomes less dense as it cools until it freezes at 0 (zero) degrees Celsius. Because water tends to form layers of equal density, this means that, as the temperature cools in the fall, most northern lakes tend to "turn over" before they freeze over (if they do). As the lakes warm up in the spring, a second "turn over" usually happens. In the summer, the coolest water will be found at the bottom. In the water, it is usually the warmest water at the bottom. In some deep lakes, the lower levels may not "turn over".

Other lake-related places you can visit here

Visit Discover Canada's Lakes at the University of Guelph.
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