Concepts
64 concepts
phenotypic plasticity
When a genotype produces different phenotypes under differing environmental conditions
frequency-dependent selection
Selection where individual fitness depends on the local frequency rather than global frequency, creating population structure with groups varying in genetic and phenotypic composition
herbivory
Consumption of plant material by animals, measured as browse occurrence on host plants
local adaptation
An evolutionary process in which a population evolves to become more suited to its local environment through natural selection, resulting in higher fitness in the home environment compared to individu...
heritability
The proportion of phenotypic variation in a trait that is due to genetic variation, estimated using parent-offspring regression methods
climate change adaptation
The ability of organisms to adjust to changing climatic conditions through genetic, phenotypic, or behavioral changes
reciprocal transplant experiment
Experimental approach where organisms from different source populations are grown in different environments to test for local adaptation
ecological speciation
The formation of new species involves divergence of phenotypes and development of reproductive isolation, where initial divergence results from divergent natural selection and reproductive isolation a...
oviposition host plant choice
The selection of specific plants by female insects for egg-laying that affects larval survival and development
evolutionary rescue
A process by which adaptive evolutionary change occurs sufficiently rapidly to counteract a decline in population size under initially unfavorable conditions
glucosinolates
Secondary metabolites that mediate interactions with herbivores and pathogens in Brassicaceae
gene flow
Movement of genes between populations through migration and reproduction
balancing selection
Selection that maintains multiple alleles in a population at frequencies above those expected from mutation alone
drought resilience
Ability of forest ecosystems to maintain function during water-limited conditions through adaptive water use strategies
quantitative genetics
The study of traits controlled by multiple loci with continuous phenotypic distributions and measurable heritability
Resource Availability Hypothesis
Predicts that fast-growing plants in high resource environments invest less in defense because they can easily regrow after herbivory
cline
A gradual change in a trait across an environmental gradient, where width is expected to be proportional to dispersal distance divided by square root of difference in selection between ends of the cli...
evolutionary trap
When previously adaptive traits become maladaptive due to rapid environmental change, such that organisms are attracted to resources that reduce their fitness
light environment
Photosynthetically active radiation levels measured as percentage of full-sun radiation
population structure
The organization of genetic variation within and among populations, reflecting patterns of gene flow, drift, and selection
genome-wide association study
Statistical approach to identify genetic variants associated with traits by scanning the entire genome
jasmonic acid-salicylic acid crosstalk
Reciprocal antagonism between plant hormone pathways where jasmonic acid suppresses salicylic acid pathway and vice versa
systemic plant response
Plant ability to produce new volatile organic compounds or change other chemical characteristics when damaged, with these chemicals communicating damage to other parts of the same plant and other plan...
linear mixed effects model
Statistical model accounting for both fixed and random effects to analyze hierarchical or repeated measures data
plant density effects
How plant population density affects individual plant growth, morphology, and susceptibility to herbivory through competition and resource availability
pleiotropic effects
When single genes or alleles influence multiple, seemingly unrelated traits
sex chromosomes
Chromosomes that determine sex, including different haplotypes in the sex-determining region
Microclimate Selection Hypothesis
Females should choose nesting sites that best protect them and their offspring from severe or unpredictable weather events, such as extreme temperatures or high wind
adaptive polymorphism
Genetic variation maintained in populations by natural selection where different alleles are favored under different conditions
anthocyanin biosynthesis
Biochemical pathway producing anthocyanin pigments responsible for purple coloration
larval food stress
Nutritional limitation during larval development that affects adult phenotype
leaf mining behavior
Feeding behavior where insect larvae create tunnels within plant leaves between epidermal layers
shade avoidance syndrome
Suite of plant responses to shade including stem elongation, reduced branching, and accelerated flowering to compete for light
Hardy-Weinberg equilibrium
A principle stating that allele and genotype frequencies remain constant in a population under certain conditions
abiotic selection
Selection pressure from non-biological environmental factors such as rain or wind
chromosomal inversion
Chromosomal rearrangement where a segment is reversed in orientation, potentially suppressing recombination and maintaining linkage between beneficial alleles
coalescent simulation
A computational method for simulating genealogies of sampled sequences under neutral evolution
conditional neutrality
An individual locus shows strong adaptive fitness effects in one habitat, but little or no cost in other habitats
defence polymorphism
Genetic variation in defensive traits maintained within populations
effect sizes
genetic constraints
Limitations on evolutionary divergence imposed by genetic architecture and patterns of genetic covariation
heterozygote deficiency
Lower than expected frequency of heterozygous genotypes in a population
individual-based model
Computational model that simulates individual organisms and their life histories to understand population-level patterns
juvenile fitness
Measures of early-life performance that may predict later survival and reproductive success
light gradient
Environmental gradient of light availability from open sun through intermediate shade to deep shade habitats
nutritional ecology
Study of how organisms obtain and use nutrients and how nutrition affects fitness
reactive oxygen species
Oxygen-containing reactive molecules with considerable environmental importance due to their high reactivity in mediating redox transformations
viral operational taxonomic units
Clustered viral sequences representing distinct viral taxa based on genomic similarity thresholds
BC-ratio
The proportion of aliphatic GS derived from branched-chain amino acid (Val and Ile) precursors, representing quantitative trait variation controlled by known biosynthetic locus
Bateman's index
Constancy index that distinguishes between complete constancy, random transitions, and complete inconstancy
