Puget sound habitat status and trends monitoring program: nearshore and large river delta geospatial data and habitat status and trends monitoring metrics

The Puget Sound Habitat Status and Trends Monitoring (PSHSTM) program was developed to provide consistent salmon habitat status and trends data to support status reviews of Endangered Species Act (ESA) listed salmon populations across Puget Sound’s major population groups. Our approach primarily relies on readily available and regularly updated aerial imagery to consistently map key habitat features at a regional scale. We have developed a census-based approach to map key habitat features throughout the nearshore, large river delta, large river, and floodplain environments across Puget Sound. This presentation will focus on our mapping efforts in Puget Sound’s nearshore and large river delta environments, and the habitat status and trends metrics that will be derived from these efforts to support ESA listing reviews. In the nearshore environment, we are mapping overwater structures (e.g., docks, piers, bridges, buoys/floats, booms, aquaculture, and boat ramps), forested shoreline, and small embayment habitat features (e.g., lagoons, pocket estuaries, and blind tidal channels) for all ≈4,000 km of Puget Sound’s shoreline. In the large river delta environment, we are mapping tidal wetland areas, geomorphic delta boundaries, and channel features (e.g., distributaries and tidal channels) for all 17 large river deltas that drain into the Puget Sound, Hood Canal, and the Strait of Juan de Fuca. This census-based approach will provide a unique opportunity to develop consistent habitat status and trends metrics for habitat quantity and quality at a regional scale that can be used to inform ESA status reviews of listed salmon populations. We anticipate that the consistent regional-scale geospatial data sets developed from these efforts can be used to support a variety of other research and management needs