the number of organisms per unit area
ex:Density: four bison/km2 in Northern Yellowstone in 2000
the range of a species is the geographical area within which that species can be found. Within that range, dispersion is variation in local density.
peregrine falcon have a vast distribution.
Three main types of dispersion
The pattern of spacing of a population within an area
Aljohara alobaidan , Fahda Bin Muqrin , Haifa Alharbi , Alanood alrajhi