A wetland is a land in which water covers the land either, for the complete year or during a particular time of the year. The wetlands can be of three types. They are freshwater wetlands, saltwater wetlands, and brackish water wetland.
Freshwater wetland is again divided into three groups. They include marshes, bogs, and swamps.
1. Bogs are the wetland formed, due to the collection of water in the depressions. Such wetland has dominating species of sphagnum moss. Water present in such bogs is mostly acidic in nature.
2. Marshes are the wetlands that are shallow and are present along the rivers. Such wetlands contain water either throughout the year or during particular season of the year.
3. Swamps are similar to the marshes with an exception that swaps are often formed due to the flooding of river. They also and often contain many trees and small shrubs.