What is an ecological corridor and why is it important for mammals?

• A. A strip of suitable habitat connecting patches to allow movement, gene flow, and recolonization.
• B. A pathway of predators that controls prey populations.
• C. A geographic barrier that divides populations.
• D. A corridor in the genome that increases mutation rate.

Answer: (A)

An ecological corridor is a strip of suitable habitat that connects patches of habitat, allowing mammals to move between them. This movement is essential because it maintains gene flow, which keeps genetic diversity high and reduces the risks of inbreeding. It also enables recolonization if a local patch declines or goes extinct, helping populations recover and persist over time. For mammals, corridors support dispersal to find mates, access seasonal resources, and navigate landscapes altered by roads, farms, and development. In short, corridors keep populations connected, resilient, and able to adapt to changing environments.

Think of other ideas as not fitting: a pathway of predators isn’t about linking habitats for movement; a geographic barrier blocks movement; and a corridor in the genome describes DNA changes rather than landscape pathways.