How are wetlands that are constantly inundated with water primarily classified?

Wetlands that are constantly inundated with water are primarily classified as marshes. Marshes are characterized by the presence of herbaceous plants that thrive in water-saturated soils, and they usually have standing water or are frequently flooded, especially during certain times of the year. This constant inundation supports a diverse ecosystem that includes various species of birds, amphibians, and aquatic plants.

In contrast to marshes, swamps are wetlands dominated by woody plants and trees, while bogs and fens are types of peat-forming wetlands that typically have more acidic conditions and are less frequently inundated. Bogs are usually waterlogged and contain sphagnum moss, while fens are minerotrophic wetlands that receive nutrients from groundwater. Both bogs and fens do not have the constant water coverage that characterizes marshes.