they change size when animals come bypass the area and practically leave seeds on the ground so the plants can grow then when more and more plants grow small organisms at first start coming but then bigger organisms come and keep coming...so thats how a population size change
the combination of population sizes that will ultimately result regardless of the initial combination of population sizes.
Population dynamicstion…
an equilibrium point at which, if either population changes, the population sizes will diverge from, rather than return to, the equilibrium point; a combination of population sizes at which the two populations could coexist, but when the combination changed, no impetus exists to return to the equilibrium population sizes.
Showing trends in changes of population sizes.
Population pyramids
Population pyramids
Population pyramid.
as the human population sizes increases , what happens?
Census
of coure they change sizes color and height
The states have different population sizes and different amounts of people to vote for each electorate.
Population dynamicstion…