Selection, Adaptation & Evolutionary Dynamics

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Abstractions about populations changing through natural, sexual, cultural, and computational selection. They include fitness landscapes, adaptation and rescue, selection coefficients and limits, coevolution, prey switching, secondary contact, convergence failures, and trait–environment matching.

19 abstractions in this family — domain-specific abstractions that sit near one another in structural-signature space (k-means over structural-signature embeddings). Each is shown with its short description.

• Aposematism — Signaling by prey that advertises defenses making attack or consumption unprofitable to predators.
• Beneficial acclimation hypothesis — The physiological hypothesis that acclimation to a particular environment improves an organism's performance in that same environment relative to alternative acclimation histories.
• Cultural hitchhiking — A gene-culture coevolution process in which selection on socially learned traits reduces diversity at genetically neutral loci transmitted through the same population lineages.
• Cultural selection theory — A family of evolutionary accounts explaining cultural change through variation, differential transmission or retention, and lineage-like inheritance.
• Evolutionary rescue — Population persistence under environmental deterioration because natural selection raises the frequency of heritable variants fast enough to reverse decline.
• Fitness seascape — Model genotype or phenotype fitness as a function that changes with time or environment, so adaptive paths respond to a moving selective surface rather than a fixed landscape.
• General selection model — A population-genetic recurrence describing allele-frequency change from genotype-specific relative fitnesses.
• Koinophilia — An evolutionary hypothesis that mate choice favors individuals with common, population-typical traits and disfavors unusual or mutant phenotypes.
• Pollinator-mediated selection — Natural selection on floral traits caused by differential visitation, pollen transfer and reproductive success associated with pollinator behavior.
• Polygenic adaptation — Evolutionary adaptation produced by coordinated small allele-frequency shifts across many loci affecting a quantitative trait rather than by fixation of one large-effect mutation.
• Population-based incremental learning — An estimation-of-distribution optimizer that evolves a probability vector summarizing successful sampled solutions instead of maintaining genetic individuals across generations.
• Premature convergence — The failure mode in an evolutionary algorithm where population diversity collapses around a suboptimal region before adequate exploration occurs.
• Prey switching — Frequency-dependent predation in which a predator disproportionately targets whichever prey type is currently most abundant.
• Secondary contact — The renewed geographic encounter of populations that diverged in allopatry, permitting competition and gene flow whose outcomes depend on accumulated reproductive isolation.
• Selection coefficient — Express a genotype or allele's fitness disadvantage relative to a declared reference in a population-genetic model, linking relative reproductive weighting to predicted frequency change.
• Selection limits — A plateau in trait response despite continued directional selection, caused by exhausted heritable variation, opposing forces, or constrained genetic architecture.
• Sensory trap hypothesis — An evolutionary hypothesis in which a mating signal succeeds by mimicking a stimulus to which receivers already evolved a response in a nonsexual context.
• Sexual antagonistic coevolution — Reciprocal evolutionary change between sex-specific traits when a mating interaction benefits one sex while imposing fitness costs on the other.
• Symmorphosis — The biological design hypothesis that structural capacity in an organism is quantitatively matched to functional demand without systematic excess.