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Delta Levees Significant Habitat Types

Freshwater Marsh (FM)

This occurs along both tidal and nontidal area near levees. Freshwater marsh may be on the waterside toe of the levee. It typically occurs in the slowest moving waters where tules have become established. Freshwater marshes may also be behind levees where there are seeps or toe ditches. This plant community typically includes cattails and common reed, also known as tules.

Riparian Forest

This includes large woody plants (including isolated trees or shrubs) greater than 20 feet tall. Often there is a dense, shrubby understory associated with the larger trees and shrubs.

Scrub-Shrub (SS)

This includes woody trees, shrubs and vines (for example, alder, willow, wild rose, buttonbush, box elder, and wild blackberries) predominantly less than 20 feet tall.

Shaded Riverine Aquatic (SRA)

This habitat is the unique, near-shore aquatic area occurring at the interconnection between river channels and levees. The greatest characteristic, and the one most commonly measured, is the presence of woody shoreline vegetation overhanging the water and creating shade. Other characteristics, which may or may not be present, but which nearly always increase habitat values include the following:

  • Live or dead woody vegetation protruding into the water
  • Leaves, twigs, or other dying or dead plant material accumulation
  • Naturally eroding banks