Interdependence - Within a community each species depends on other species for food, shelter, pollination, seed dispersal etc. If one species is removed it can affect the whole community.
This is called interdependence. A stable community is one where all the species and environmental factors are in balance so that population sizes remain fairly constant.
Interdependence - this must watch video gives a brilliant demonstration of the importance of a single species in an ecosystem.
A population is a group of individuals of the same species inhabiting the same area.
A community is all the populations of different organisms that live together in a habitat