Which concept defines species based on the uniqueness of their ecological niche?

Which concept defines species based on the uniqueness of their ecological niche?

• A. Evolutionary species concept
• B. Ecological species concept
• C. Recognition species concept
• D. Allopatric speciation

Answer: (B)

Ecological niche is the lens through which species are defined here: a species is seen as a group of organisms that occupies a distinct set of resources and environmental conditions, with its own role in the ecosystem. When populations specialize on different resources or habitats, they experience different selective pressures and interactions, which can lead to reduced interbreeding and eventual reproductive isolation. In this view, the boundary between species is set by occupying unique ecological spaces, so differences in niche use help keep species separate even if individuals could mate. This stands in contrast to the evolutionary species concept, which defines species by a single, independently evolving lineage; the recognition species concept, which centers on mate recognition systems; and allopatric speciation, which describes a geographic process that can lead to separation but isn’t a definition of what makes a species. So the idea that defines species by the uniqueness of their ecological niche is the ecological species concept.

Ecological niche is the lens through which species are defined here: a species is seen as a group of organisms that occupies a distinct set of resources and environmental conditions, with its own role in the ecosystem. When populations specialize on different resources or habitats, they experience different selective pressures and interactions, which can lead to reduced interbreeding and eventual reproductive isolation. In this view, the boundary between species is set by occupying unique ecological spaces, so differences in niche use help keep species separate even if individuals could mate.

This stands in contrast to the evolutionary species concept, which defines species by a single, independently evolving lineage; the recognition species concept, which centers on mate recognition systems; and allopatric speciation, which describes a geographic process that can lead to separation but isn’t a definition of what makes a species. So the idea that defines species by the uniqueness of their ecological niche is the ecological species concept.