FHEP has applied impervious thresholds and targets to anadromous spawning habitat in Maryland.
Anadromous fish are fish that migrate from saltwater to freshwater to spawn. Anadromous species in the Bay include Striped bass, Hickory and American shad, Blueback herring, alewife, White perch, and Yellow perch. This spawning habitat is vulnerable to land development because it is on the receiving end of the most of the water's drainage, and the spawning and nursery areas are limited in size. Eggs and larvae are sensitive to increases of sediment and pollution, and disruption of their food supply that occur once development exceeds a watershed's limit.
Above is a map of watersheds with anadromous spawning habitat with the impervious target and threshold applied. Best habitat has many anadromous species present and low (target or below) levels of development. Poor habitat has few species and-or low usage by anadromous species.
These are general recommendations that can be applied, with specific considerations to present condition of spawning habitat and other resource values. For more information contact Jim Uphoff.
580 Taylor Ave, Annapolis MD 21401