Ecological inheritance

Ecological inheritance is the transmission of modified selective environments from one generation to the next, operating alongside genetic inheritance and epigenetic inheritance as a distinct channel of evolutionary information. The concept is central to niche construction theory: when an organism alters its environment — constructing a burrow, acidifying soil, establishing a social structure — that altered environment can persist across generations, shaping the selective pressures experienced by descendants who did not participate in the original construction. Unlike genetic inheritance, ecological inheritance does not require biological relatedness between the constructing and inheriting organisms. A forest altered by beaver activity shapes the selective environment of all species in that watershed, related or not.

The claim that ecological inheritance constitutes a genuine second inheritance system — not merely an environmental effect describable in standard population genetics — is contested. Critics argue that selective environments are already parameterized in standard fitness equations. Proponents, following Odling-Smee and Laland, argue that the parameterization systematically underestimates the persistence and specificity of organism-constructed environments, and that treating ecological inheritance as an inheritance system changes which evolutionary questions become tractable. The relationship to cultural evolution is direct: cultural transmission in humans is a special case of ecological inheritance in which the modified environment includes symbolic, institutional, and technological structures.