looking at present-day biodiversity patterns in 4000 bivalve species, they have found no relationship between habitable area - in this case, continental shelf - and the number of bivalve species.
all of this information gives scientists a picture of what the surface layer of dirt looks like now and whether or not it might have been a habitable area at some point in the planet's past.
research of the habitable area differentiation phenomenon put forward challenge for the public monopoly behavior which controls and leads the urban planning.