by plants moving
A change in plant communities through time is Succession.
Any change over time is called rate
The population of animals in a prairie community would be negatively affected if one is over hunted because it would change the populations of the other species. This makes the ecosystem unbalanced.
Evolution i think
Change over time in populations of organisms. Or, more formally; the change in allele frequency over time in a population of organisms.
One reason is because of the economy in the community. Others reasons may include because of the schools and because of culture changes.
new species form.
A change in plant communities through time is Succession.
Evolution is the change in the frequency of alleles of a population of organisms over time.
it is evolution