Concepts

All (538)Explore Concept Graph

538 concepts

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

population decline

Reduction in population growth rates, size, or occurrence across species ranges

population ecology5 papers
hypothesis

recruitment limitation

The hypothesis that relationships between egg and juvenile densities are linear when egg densities are constrained below values where eggs or hatching juveniles suffer density-dependent losses

population ecology5 papers
measurement

size at maturity

Body size when organisms transition from growth to reproduction, with important consequences for lifetime reproductive success

population ecology5 papers
measurement

social embeddedness

The degree to which an individual is integrated in their group based on the number of independent links to others in the group

population ecology5 papers
measurement

synchrony

The degree to which individuals in a population exhibit coordinated timing of nesting activity

population ecology5 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
measurement

abundance

population ecology4 papers
measurement

basal area

population ecology4 papers
measurement

boldness

Individual's reaction to a non-novel, risky situation

population ecology4 papers
process

colony establishment

Initial colonization phase when winged aphids establish new colonies on host plants

population ecology4 papers
measurement

distribution

population ecology4 papers
measurement

emergence weight

population ecology4 papers
measurement

herkogamy

population ecology4 papers
process

hibernation ecology

Winter survival strategy of some small mammals that may affect their vulnerability to avalanche disturbance depending on burrow depth and emergence timing

population ecology4 papers
theory

ideal free distribution

Theory that animals distribute themselves among habitat patches in proportion to resource availability, with high-quality patches becoming occupied first and animals moving to lower-quality patches as...

population ecology4 papers
metric

infection prevalence

population ecology4 papers
metric

infection prevalence

Proportion of individuals in a population showing signs of pathogen infection

population ecology4 papers
phenomenon

larval food stress

Nutritional limitation during larval development that affects adult phenotype

population ecology4 papers
measurement

neophobia

An aversion to novel stimuli, measured as latency to touch the puzzle box from stepping onto the platform

population ecology4 papers
metric

nest density

Number of nests per unit area, calculated by dividing number of nests in each habitat by total area

population ecology4 papers
process

pathogen transmission

Spread of disease between individuals through various mechanisms including spore dispersal

population ecology4 papers
process

range expansion

population ecology4 papers
process

root turnover

population ecology4 papers
process

social transmission

Transmission of parasites among individuals within social mammalian groups

population ecology4 papers
theory

source-sink dynamics

Some environments will be resource rich and produce a high amount of offspring (sources) while other environments will be resource low and produce a low amount of offspring (sinks)

population 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
measurement

age at sexual maturity

population ecology3 papers
process

agonistic interactions

population ecology3 papers
phenomenon

bloom formation

population ecology3 papers
process

clonal reproduction

Vegetative reproduction producing genetically identical individuals, characteristic of quaking aspen forming cohesive clones with limited spatial interdigitation

population ecology3 papers
phenomenon

defence polymorphism

Genetic variation in defensive traits maintained within populations

population ecology3 papers
hypothesis

demographic buffering hypothesis

Hypothesis that populations may be buffered from adverse climatic effects when vital rates with high impacts on population growth exhibit the least temporal variability

population ecology3 papers
process

epidemic dynamics

The temporal progression and patterns of disease spread through host populations

population ecology3 papers
metric

fixation indices

F-statistics (FIS, FST, FIT) measuring genetic differentiation and inbreeding at different hierarchical levels

population ecology3 papers
measurement

floral scent

population ecology3 papers
phenomenon

group size effects

Changes in social behavior and group dynamics that result from variation in the number of individuals in a social group

population ecology3 papers
phenomenon

heterozygote deficiency

Lower than expected frequency of heterozygous genotypes in a population

population ecology3 papers
metric

inbreeding coefficient

Measure of the level of inbreeding within a population, with values close to 1.0 indicating high levels of inbreeding

population ecology3 papers
concept

juvenile fitness

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

population ecology3 papers
measurement

leaf number

population ecology3 papers
phenomenon

litter sex composition

The proportion of male versus female offspring in a litter affecting prenatal hormone exposure

population ecology3 papers
phenomenon

male-biased dispersal

Pattern where male mammals tend to travel farther than females in exploratory excursions and disperse more than females

population ecology3 papers
measurement

mass gain

Proportional increase in body mass during the active growing season, calculated as August 15 body mass divided by June 1 body mass

population ecology3 papers
hypothesis

multipredator hypothesis

Assumes that antipredator adaptations evolve together and thus prey may respond to extinct predators as long as they have experience with other predators.

population ecology3 papers
framework

nesting traits

Life history characteristics related to where and how bees construct their nests, categorized as above-ground or below-ground

population ecology3 papers
process

optimal outcrossing distance

Distance range that maximizes pollen fertilization success and offspring survival

population ecology3 papers
process

positive feedback loop

Mechanism where state and behavior mutually reinforce each other, measured as positive correlation between individual intercept and slope in random regression models.

population ecology3 papers
process

post-fire recovery period

Period required for sagebrush to recover to pre-fire conditions after burning

population ecology3 papers
theory

resource allocation

The distribution of limited resources among competing physiological functions such as growth, reproduction, and defense

population ecology3 papers