Tidal creek bottom
Note: At present, this type is no longer tracked as a natural community (see future marine aquatic classification).
Tidal creek bottoms are the permanently flooded (or very rarely exposed), organic-matter-rich mud flats beneath estuarine creeks that drain high and low salt marsh into a main channel or bay. Vascular plants are sparse but may include widgeon-grass (Ruppia maritima). They provide habitat for stickelback and several other species of fish, and foraging ground for migratory and year-round bird species and other animals. The banks of tidal creeks are often nearly vertical and frequently slump, supporting a narrow band of low salt marsh. Sometimes, however, there can be a narrow zone of exposed, sloping saline/brackish intertidal flat (mud flat) just above the tidal creek bottom.
Tidal creek bottom (below the creek) at the edge of Great Bay (photo by Ben Kimball)
Tidal Creeks at the southern end of Great Bay (photo by Ben Kimball)