A salt marsh is an environment in the upper coastal intertidal zone between land and salt water
or brackish water, it is dominated by dense stands of salt-tolerant plants such as herbs, grasses, or
low shrubs. These plants are terrestrial in origin and are essential to the stability of the salt
marsh in trapping and binding sediments. Salt marshes play a large role in the aquatic food web and
the delivery of nutrients to coastal waters. They also support terrestrial animals and provide
coastal protection.(Wiki)