English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The role of the selection pressure and mutation amplitude on the behavior ofa single-species population evolving on a two-dimensional lattice, in aperiodically changing environment, is studied both analytically andnumerically. The mean-field level of description allows to highlight thedelicate interplay between the different time-scale processes in the resultingcomplex dynamics of the system. We clarify the influence of the amplitude andperiod of the environmental changes on the critical value of the selectionpressure corresponding to a phase-transition "extinct-alive" of the population.However, the intrinsic stochasticity and the dynamically-built in correlationsamong the individuals, as well as the role of the mutation-induced variety inpopulation's evolution are not appropriately accounted for. A more refinedlevel of description, which is an individual-based one, has to be considered.The inherent fluctuations do not destroy the phase transition "extinct-alive",and the mutation amplitude is strongly influencing the value of the criticalselection pressure. The phase diagram in the plane of the population'sparameters -- selection and mutation is discussed as a function of theenvironmental variation characteristics. The differences between a smoothvariation of the environment and an abrupt, catastrophic change are alsoaddressesd.Comment: 15 pages, 12 figures. Accepted for publication in Phys. Rev.

Complex population dynamics as a competition between multiple-time-scale phenomena