Wetlands can do and be many things, including: reduce flooding, filter pollutants, be incredibly productive, and act as a nature preserve
Energy is transferred from the sun, plants, and animals. The food web in a wetland offers many choices for animals.
Bottomland hardwood forests, or swamps, receive most of its water from river floods, which effects what types of plants can grow in them.
Sedimentation is a passive process for removing substances. Biogeochemical functions are active processes.
The amount of nitrogen in rivers has increased over the years, but wetlands can filter out some of it