Estuarine functional zone map

An extraction of the dune base line from the first version of an integrated coast map including coastal ecosystem types from the terrestrial, marine, and estuarine realms. The dune base line separates the shore from the backshore. The dune base represents the beginning of Tilney's (1985) Zone I of dune pioneer species and represents a more defensible and ecologically relevant approximation of a decadal scale dynamic ‘high water mark'.