Does functional redundancy determine the ecological severity of a mass extinction event?

ABSTRACT: Many authors have noted the apparent 'decoupling' of the taxonomic and ecological severity of mass extinction events, with no widely accepted mechanistic explanation for this pattern having been offered. Here, we test between two key factors that potentially influence ecological severity: biosphere entropy (a measure of functional redundancy), and the degree of functional selectivity (in terms of deviation from a pattern of random extinction with respect to functional entities). While theoretical simulations suggest that the Shannon entropy of a given community prior to an extinction event determines the expected outcome following a perturbation of a given magnitude, actual variation in Shannon entropy between major extinction intervals is insufficient to explain the observed variation in

SUBMITTER: Dick DG 

PROVIDER: S-EPMC9326297 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature