How density dependence, genetic erosion and the extinction vortex impact evolutionary rescue.

ABSTRACT: Following severe environmental change that reduces mean population fitness below replacement, populations must adapt to avoid eventual extinction, a process called evolutionary rescue. Models of evolutionary rescue demonstrate that initial size, genetic variation and degree of maladaptation influence population fates. However, many models feature populations that grow without negative density dependence or with constant genetic diversity despite precipitous population decline, assumptions likely to be violated in conservation settings. We examined the simultaneous influences of density-dependent growth and erosion of genetic diversity on populations adapting to novel environmental change using stochastic, individual-based simulations. Density dependence decreased the probability of rescue

SUBMITTER: Nordstrom SW 

PROVIDER: S-EPMC10688442 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature