Write a note on succession in lakes.
Answers
Freshwater lakes, in principal, are ephemeral. As a system they are created, they age, and they die, in a predictable pattern. This process of aging is what we call succession. Many palustrine systems like freshwater marshes and bogs are simply really old lakes and ponds. Lake succession is mainly driven by the input of organic matter and sediment into the lake system. As the lake fills up, it looses water and becomes a new type of system.
Lakes are born in many different ways. Receding glaciers can leave large depressions in the landscape which can quickly be filled with water and glacial out-wash. These types of lakes are called kettle lakes. Crater lakes are formed in the middle of a volcanic depression or the crater left by an asteroid collision. If the meandering pattern of a river pinches off it can leave an oxbow lake, a stagnant body of water in the depression of a former flowing river.
If you think you’ve noticed a pattern here you’re not crazy. Lakes are born in topographical depressions and filled with water. The speed at which the lake ages and goes through its stages of succession depends on the amount of water, nutrients and sediment being put in or taken out of it.
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