Five-minute grid of marine bird biomass density surveyed off central California - all seasons, 1980-2001 (CDAS data set AL0_MASS.shp)
AL0_MASS is a polygon shapefile representing 5 minute x 5 minute latitude x longitude cells that house the overall total biomass densities (kg/sq.km.) of 76 species of marine birds regardless of season and/or oceanic conditions. Density for each of 76 marine bird species was multiplied by average body mass for that …