The dominate habitat type on the refuge is one of the most productive ecosystems in the world….the salt marsh. The sediment of these marshes annually produce an amazing 4-10 tons of organic matter per acre. The refuge has over 2000 acres of saltmarsh that supports a huge plant and animal community in a complex food web cycle. The prevalent plant species, Salt grass, plays an instrumental role in the cycle. As leaves die in the fall they decompose, allowing microscopic organisms to attach and help to further breakdown the plant material. Worms, fishes, shrimp, and crabs then feed on this material. Birds, mammals, and reptiles continue the web by feeding on the bottom feeders. All remnants of the decomposing plant material becomes fertilizer for the next growing season.