Located where land meets water, wetlands are vital habitats in the Chesapeake Bay watershed. Wetlands act like a sponge, soaking up stormwater and dampening storm surges. By trapping polluted runoff, wetlands help slow of the flow of nutrients, sediment and chemical contaminants into rivers, streams and the Bay. Hundreds of species of fish, birds, mammals and invertebrates depend on wetlands, and humans rely on wetlands to support recreational fishing and hunting across the watershed. But shoreline development, sea level rise and invasive species pose major threats to these critical habitats: development along beaches and shorelines blocks the creation of further wetland habitat and creates excess sediment; sea level rise floods wetlands with saltwater, destroying plants faster than they can populate higher ground; and invasive plants and animals can crowd out native species or damage wetland habitat.