ACJV_predicted_density_all_regions_SALS_HL (Map Service)
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Current Version: 10.81
Service Description: These data estimate and predict the occupancy and density for the Saltmarsh Sparrow (Ammospiza caudacuta) using a fine-scale, raster-based vegetation data layer (Correll et al. 2019) using the existing Saltmarsh Habitat and Avian Research Program (SHARP; 2011-2014) point count database spanning tidal marshes from Maine to Virginia. These data were produced along with 5 other complementary layers to 1) estimate Saltmarsh and Nelson’s Sparrow occupancy and density across suitable habitat in USFWS Region 5, 2) predict sparrow occupancy and density using these established relationships in unsurveyed areas, and 3) provide an estimate of unknown Sharp-tailed Sparrows within the established hybrid zone for these two species. These data can be used to examine predicted hotspots for Saltmarsh and Nelson’s Sparrow occupancy and density to inform local, state, and regional planning efforts involving these species. A full description of methods, results, and accuracy assessment can be found
here.
We strongly recommend use of the numeric values presented in these layers only as an index to identify hotspots, and not for extrapolation of population estimates or trends. For population estimates for Saltmarsh and Nelson’s sparrows please reference Wiest et al. 2016 and 2019. For trend estimates please reference Correll et al. 2017.
Map Name: SALSmodels
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Description: These data estimate and predict the occupancy and density for the Saltmarsh Sparrow (Ammospiza caudacuta) using a fine-scale, raster-based vegetation data layer (Correll et al. 2019) using the existing Saltmarsh Habitat and Avian Research Program (SHARP; 2011-2014) point count database spanning tidal marshes from Maine to Virginia. These data were produced along with 5 other complementary layers to 1) estimate Saltmarsh and Nelson’s Sparrow occupancy and density across suitable habitat in USFWS Region 5, 2) predict sparrow occupancy and density using these established relationships in unsurveyed areas, and 3) provide an estimate of unknown Sharp-tailed Sparrows within the established hybrid zone for these two species. These data can be used to examine predicted hotspots for Saltmarsh and Nelson’s Sparrow occupancy and density to inform local, state, and regional planning efforts involving these species. A full description of methods, results, and accuracy assessment can be found
here.
We strongly recommend use of the numeric values presented in these layers only as an index to identify hotspots, and not for extrapolation of population estimates or trends. For population estimates for Saltmarsh and Nelson’s sparrows please reference Wiest et al. 2016 and 2019. For trend estimates please reference Correll et al. 2017.
Copyright Text: Layers were created by the University of Delaware and SHARP. Earlier drafts of these data were reviewed by USFWS through the Atlantic Coast Joint Venture. Funding for this effort was provided by USFWS Coastal and Migratory Bird Programs.
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Document Info: - Title: ACJV Predicted density - Saltmarsh Sparrow (Ammospiza caudacuta)
- Author: kirsten_luke@fws.gov_fws
- Comments:
- Subject: Layers were created by the University of Delaware and SHARP. Earlier drafts of these data were reviewed by USFWS through the Atlantic Coast Joint Venture. Funding for this effort was provided by USFWS Coastal and Migratory Bird Programs.
- Category:
- Keywords: UDEL, SALS, ACJV, FWS, U.S. Fish and Wildlife Service, Saltmarsh Sparrow