Wetlands are very valuable ecosystems in our terrestrial-freshwater biome, providing a number of ecoystem services. What benefits do wetlands provide? Check all that apply. Wetlands sequester sediment, contaminants, and excessive nutrients Wetands combine river freshwater and ocean saltwater, making them ecologically productive Wetlands provide habitat to support ecological biodiversity Wetlands provide aesthetic services and recreational opportunities Wetlands store most of the frestwater on Earth that we use for drinking and other services.