human
What are the most common types of wetlands?
assistant
The most common types of wetlands are marshes, swamps, bogs, and fens. Marshes are typically found in low-lying areas that are frequently flooded or saturated with water, while swamps are typically found in more upland areas and have a higher water table than marshes. Bogs are similar to swamps but have a deeper water table and are dominated by sphagnum mosses. Fens are shallow wetlands dominated by sedges and other plants adapted to wet conditions.