Functional connectivity

Functional connectivity is the degree to which a landscape actually facilitates the movement and ecological processes of a particular species, as opposed to the structural connectivity that merely describes the physical arrangement of habitat patches. A landscape may be structurally connected — corridors exist, patches are adjacent — yet functionally disconnected if the corridors are too narrow, too degraded, or frequented by predators that make them death traps for the species of interest. Functional connectivity is therefore species-specific: what connects a forest bird may fragment a ground-dwelling mammal.

The concept bridges landscape ecology and movement ecology, shifting focus from maps to processes. It is measured not by landscape metrics but by empirical data: radio-tracking, genetic analysis, camera traps, and increasingly, GPS telemetry that records actual movement paths. The gap between structural and functional connectivity is one of the most productive research frontiers in spatial ecology, revealing how organisms perceive and respond to landscape structure in ways that human cartographers do not.