What term describes all individuals of a specific species within a given area?

The term that describes all individuals of a specific species within a given area is "population." In ecology, a population refers to a group of organisms of the same species that live together in a particular geographic location at the same time. This definition emphasizes the aspects of spatial and temporal relationships among individuals of the same species.

In contrast, a community encompasses all the different populations that interact within a certain area, which includes multiple species. An ecosystem expands the concept further to include not only the living organisms (the biotic community) but also the non-living components (abiotic factors) interacting within that environment. The term "biotic community" specifically points to the living components of an ecosystem, excluding the abiotic factors. Therefore, "population" is the most precise term when referring exclusively to individuals of a single species in a defined area.