Concepts
21 concepts
early-life trade-offs
The concept that organisms face competing demands for limited resources during development that create trade-offs between different fitness components
metapopulation structure
The spatial arrangement and connectivity of subpopulations across a landscape that influences local population dynamics
cannibalism
Predation behavior where individuals consume members of their own species, particularly common in A. m. nebulosum populations targeting first year hatchlings
juvenile growth rate
Daily mass gain during critical post-emergence development period in juvenile mammals
instar development
The progression through larval developmental stages with associated changes in size and feeding capacity
demographic factors
Age and sex characteristics affecting susceptibility to mortality
population stage structure
The distribution of individuals across different size or age classes within a population
case construction
Caddisfly larvae ability to construct protective cases from environmental debris using silk-like string
insect recruitment
Addition of new individuals to insect populations through successful reproduction and development
stalk production
Production of extracellular polymeric stalk material by diatoms when photosynthetic rates exceed cellular growth rates
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
size at maturity
Body size when organisms transition from growth to reproduction, with important consequences for lifetime reproductive success
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)
Hardy-Weinberg equilibrium
A principle stating that allele and genotype frequencies remain constant in a population under certain conditions
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.
demographic compensation
Population response where decreases in fitness due to other factors are offset by increases in another demographic parameter
depletion sampling
Population estimation method using repeated sampling to remove individuals and estimate total abundance from decline curve
diel periodicity
Daily patterns in organism behavior, with some mayfly species showing increased drift activity at night to minimize exposure to visual predators
size at emergence
The body size of mayflies when they emerge as adults from aquatic larval stage