1.these are group of organisms that exploit or are adapted to a particular niche.
2.it defines spicies as a group of organisms that are genetically compatible,interbreeding natural populations that is genetically isolated from other such group
3.it defines spicies as a series of ancestor descendent population passing through time and space independent of other populations

1.Ecological Species Concept: a set of organisms exploiting or adapted to a single niche; a lineage or a closely related set of lineages, which occupies an adaptive zone minimally different from that of any other lineage in its range.

2.define a genetic species as a group of genetically compatible interbreeding natural populations that is genetically isolated from other such groups. This focus on genetic isolation rather than reproductive isolation distinguishes the Genetic Species Concept from the Biological Species Concept.

3.Evolutionary species concept.

"A species is a series of ancestor descendent populations passing through time and space independent of other populations, each of which possesses its own evolutionary tendencies and historical fate" (George Gaylord Simpson).

Explanation:

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