Five-minute grid of marine bird density off central California - Davidson Current seasons, 1980-2001 (CDAS data set Da0 dens.shp)

공공데이터포털

Da0_dens is a polygon shapefile representing 5 minute x 5 minute latitude x longitude cells that contain the overall, combined densities (birds/sq km), of 76 species of marine birds in the CDAS central CA data set, for the Davidson Current Season (Nov15-Mar14). The number of marine birds seen in a cell was divided by the area sampled in the cell to estimate density. If a cell was censused more than once, densities were averaged. Cells that were surveyed but in which no birds were observed have densities of zero.

Five-minute grid of marine bird density off central California - Oceanic season, 1980-2001 (CDAS data set Oc0 dens.shp)

공공데이터포털

Oc0_dens is a polygon shapefile representing 5 minute x 5 minute latitude x longitude cells that contain the overall, combined densities (birds/sq km), of 76 species of marine birds in the CDAS central CA data set, for the Oceanic Season (Aug15-Nov14). The number of marine birds seen in a cell was divided by the area sampled in the cell to estimate density. If a cell was censused more than once, densities were averaged. Cells that were surveyed but in which no birds were observed have densities of zero.

Five-minute grid of marine bird density off central California - all seasons, 1980-2001 (CDAS data set AL0 DENS.shp)

공공데이터포털

AL0_DENS is a polygon shapefile representing 5 minute x 5 minute latitude x longitude cells that contain the overall, combined densities (birds/sq.km.), of 76 species of marine birds in the CDAS central CA data set, regardless of season and/or oceanic conditions. The number of marine birds seen in a cell was divided by the area sampled in the cell to estimate density. If a cell was censused more than once, densities were averaged. Cells that were surveyed but in which no birds were observed have densities of zero.

Five-minute grid of marine bird density data off central California, 1980-2001 (CDAS data set five-min-grid)

공공데이터포털

A shapefile of five minute grids with summary information on at-sea bird surveys from 1980-2001. Bird densities by ocean season, by species.

Five-minute grid of marine bird biomass density surveyed off central California - Upwelling season, 1980-2001 (CDAS data set Up0 mass.shp)

공공데이터포털

Up0_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 in the Upwelling season (March 15 - August 14, 1980-2001). Density for each of 76 marine bird species was multiplied by average body mass for that species, and these products summed for all species in a cell, to obtain total biomass density. Cells that were surveyed but in which no birds were observed have total biomass densities of zero.

Five-minute grid shapefile with marine bird density data off central California, CDAS data (1980-2001)

공공데이터포털

A shapefile of five minute grids that contains marine bird density data at-sea from the CDAS Central CA data set (1980-2001). It is a shapefile representing 5 minute x 5 minute latitude x longitude cells that house the densities (birds/sq.km.) of 40 species of marine birds during the Upwelling, Oceanic and Davidson Current Seasons. The number of marine birds seen in a cell was divided by the area sampled in the cell to estimate density. If a cell was surveyed more than once, densities were averaged and weighted according to effort. Cells that were surveyed but in which no birds were observed have densities of zero.

Five-minute grid of marine bird biomass density off central California - Oceanic season, 1980-2001 (CDAS data set Oc0 mass.shp)

공공데이터포털

Oc0_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 in the Oceanic season (August 15 - November14, 1980-2001). Density for each of 76 marine bird species was multiplied by average body mass for that species, and these products summed for all species in a cell, to obtain total biomass density. Cells that were surveyed but in which no birds were observed have total biomass densities of zero.

Five-minute grid of marine bird biomass density surveyed off central California - all seasons, 1980-2001 (CDAS data set AL0 MASS.shp)

공공데이터포털

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 species, and these products summed for all species in a cell, to obtain total biomass density. Cells that were surveyed but in which no birds were observed have total biomass densities of zero.

Five-minute grid of marine bird biomass density surveyed off central California - Davidson Current season, 1980-2001 (CDAS data set Da0 mass.shp)

공공데이터포털

Da0_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 in the Davidson Current season (November 15 - March 14, 1980-2001). Density for each of 76 marine bird species was multiplied by average body mass for that species, and these products summed for all species in a cell, to obtain total biomass density. Cells that were surveyed but in which no birds were observed have total biomass densities of zero.

Five-minute grid of total marine bird biomass densities surveyed off central California - selected warm water periods, 1980-2001 (CDAS data set AL1 MASS.shp)

공공데이터포털

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 species, and these products summed for all species in a cell, to obtain total biomass density. Cells that were surveyed but in which no birds were observed have total biomass densities of zero.