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Concepts

All (64)Explore Concept Graph

64 concepts

process

phenotypic plasticity

When a genotype produces different phenotypes under differing environmental conditions

evolution114 papers
theory

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

population ecology41 papers
process

herbivory

Consumption of plant material by animals, measured as browse occurrence on host plants

community ecology41 papers
theory

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...

evolution37 papers
metric

heritability

The proportion of phenotypic variation in a trait that is due to genetic variation, estimated using parent-offspring regression methods

evolution35 papers
process

climate change adaptation

The ability of organisms to adjust to changing climatic conditions through genetic, phenotypic, or behavioral changes

climate32 papers
framework

reciprocal transplant experiment

Experimental approach where organisms from different source populations are grown in different environments to test for local adaptation

methodological31 papers
process

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...

evolution27 papers
process

oviposition host plant choice

The selection of specific plants by female insects for egg-laying that affects larval survival and development

population ecology21 papers
theory

evolutionary rescue

A process by which adaptive evolutionary change occurs sufficiently rapidly to counteract a decline in population size under initially unfavorable conditions

evolution20 papers
measurement

glucosinolates

Secondary metabolites that mediate interactions with herbivores and pathogens in Brassicaceae

community ecology19 papers
process

gene flow

Movement of genes between populations through migration and reproduction

population ecology18 papers
process

balancing selection

Selection that maintains multiple alleles in a population at frequencies above those expected from mutation alone

population ecology15 papers
phenomenon

drought resilience

Ability of forest ecosystems to maintain function during water-limited conditions through adaptive water use strategies

climate14 papers
framework

quantitative genetics

The study of traits controlled by multiple loci with continuous phenotypic distributions and measurable heritability

evolution12 papers
hypothesis

Resource Availability Hypothesis

Predicts that fast-growing plants in high resource environments invest less in defense because they can easily regrow after herbivory

general ecology10 papers
phenomenon

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...

population ecology9 papers
phenomenon

evolutionary trap

When previously adaptive traits become maladaptive due to rapid environmental change, such that organisms are attracted to resources that reduce their fitness

evolution9 papers
measurement

light environment

Photosynthetically active radiation levels measured as percentage of full-sun radiation

general ecology8 papers
measurement

population structure

The organization of genetic variation within and among populations, reflecting patterns of gene flow, drift, and selection

population ecology8 papers
methodology

genome-wide association study

Statistical approach to identify genetic variants associated with traits by scanning the entire genome

methodological7 papers
process

jasmonic acid-salicylic acid crosstalk

Reciprocal antagonism between plant hormone pathways where jasmonic acid suppresses salicylic acid pathway and vice versa

plant ecology7 papers
process

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...

plant physiology7 papers
model type

linear mixed effects model

Statistical model accounting for both fixed and random effects to analyze hierarchical or repeated measures data

methodological5 papers
process

plant density effects

How plant population density affects individual plant growth, morphology, and susceptibility to herbivory through competition and resource availability

population ecology5 papers
phenomenon

pleiotropic effects

When single genes or alleles influence multiple, seemingly unrelated traits

evolution5 papers
mechanism

sex chromosomes

Chromosomes that determine sex, including different haplotypes in the sex-determining region

molecular5 papers
hypothesis

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

population ecology4 papers
phenomenon

adaptive polymorphism

Genetic variation maintained in populations by natural selection where different alleles are favored under different conditions

evolution4 papers
process

anthocyanin biosynthesis

Biochemical pathway producing anthocyanin pigments responsible for purple coloration

molecular4 papers
phenomenon

larval food stress

Nutritional limitation during larval development that affects adult phenotype

population ecology4 papers
phenomenon

leaf mining behavior

Feeding behavior where insect larvae create tunnels within plant leaves between epidermal layers

insect behavior4 papers
phenomenon

shade avoidance syndrome

Suite of plant responses to shade including stem elongation, reduced branching, and accelerated flowering to compete for light

general ecology4 papers
theory

Hardy-Weinberg equilibrium

A principle stating that allele and genotype frequencies remain constant in a population under certain conditions

population ecology3 papers
process

abiotic selection

Selection pressure from non-biological environmental factors such as rain or wind

evolution3 papers
phenomenon

chromosomal inversion

Chromosomal rearrangement where a segment is reversed in orientation, potentially suppressing recombination and maintaining linkage between beneficial alleles

evolution3 papers
framework

coalescent simulation

A computational method for simulating genealogies of sampled sequences under neutral evolution

methodological3 papers
hypothesis

conditional neutrality

An individual locus shows strong adaptive fitness effects in one habitat, but little or no cost in other habitats

evolution3 papers
phenomenon

defence polymorphism

Genetic variation in defensive traits maintained within populations

population ecology3 papers
metric

effect sizes

methodological3 papers
theory

genetic constraints

Limitations on evolutionary divergence imposed by genetic architecture and patterns of genetic covariation

evolution3 papers
phenomenon

heterozygote deficiency

Lower than expected frequency of heterozygous genotypes in a population

population ecology3 papers
model type

individual-based model

Computational model that simulates individual organisms and their life histories to understand population-level patterns

methodological3 papers
concept

juvenile fitness

Measures of early-life performance that may predict later survival and reproductive success

population ecology3 papers
phenomenon

light gradient

Environmental gradient of light availability from open sun through intermediate shade to deep shade habitats

general ecology3 papers
framework

nutritional ecology

Study of how organisms obtain and use nutrients and how nutrition affects fitness

general ecology3 papers
process

reactive oxygen species

Oxygen-containing reactive molecules with considerable environmental importance due to their high reactivity in mediating redox transformations

biogeochemistry3 papers
measurement

viral operational taxonomic units

Clustered viral sequences representing distinct viral taxa based on genomic similarity thresholds

molecular3 papers
measurement

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

molecular2 papers
metric

Bateman's index

Constancy index that distinguishes between complete constancy, random transitions, and complete inconstancy

methodological2 papers