Wetlands provide a temporary water storage that reduces flooding after rainstorms, allowing it to either soak into the ground of evaporate.
Wetlands usually go through wet and dry cycles, which promotes decomposition and the recycling of nutrients back into wetland vegetation.
Wetlands help protect shorelines by decreasing their chance of erosion and providing flood protection. Some riparian wetlands even help reduce flooding of inland systems.
Wetlands act as a filtration system, filtering out sediment, pesticides and bacteria out of the waters that make it through them. They even break down pollutants through biological processes.
Wetlands store organic carbon in plants, animals and the organic soils.