animal habitat structure

How does eelgrass density influence abundance of species in a ecosystem?

-Provide habitats for invertebrates, food, and cover for the many species that live there
-Its rhizomes help to trap sediment and anchor shifting sands, and its leaves dampen wave action. This helps to prevent beach erosion

http://www.oregon.gov/DSL/SSNERR/tides/tidesA13_eelgrassfacts.pdf
http://www.crd.bc.ca/watersheds/protection/wildlife-plants/eelgrass.htm