All of the populations living together in the same area are called a(n) .

Correct Community.

An ecosystem refers to the biological inter-relationship of the biotic and abiotic components in an area. A detailed evaluation of the organisms, populations and the community explains how the biotic components are dependent on the abiotic components in the environment. Population refers to the group of individuals of the same species living in an area, whereas the community is the group of populations living in an area.