Studied by 4 people
Dispersion
________: the pattern of spacing among individuals within the boundaries of the population.
population density
Increasing ________ intensifies competition for resources and results in a lower birth rate.
Reproductive strategy
________ has a strong effect on subsequent age classes of a population.
Predators
________ kill few prey when the prey population is low, more prey when the population is higher.
Life history traits
________ are evolutionary outcomes reflected in the development, physiology, and behavior of an organism.
Semelparity
________: produce all offspring in single reproductive event.
organisms life history
A(n) ________ comprises the traits that affect its schedule of reproduction and survival.
Uniform
________: members of a population are dispersed relatively evenly.
Populations
________ are described by their boundaries and size.
Random
________: members of a population are distributed without a predictable pattern.
Semelparous organisms
________ have batches of young the same age, called cohorts.
Population ecology
________: the study of populations in relation to their environment.
Density
________: the number of individuals per unit area or volume.
Iteroparity
________: reproduce in successive years or breeding seasons.
Iteroparous organisms
________ have young of different ages.
R selection
________: density- independent selection, selects for life history traits that maximize reproduction.
Population density
________ is determined by immigration and emigration.
Density
________- dependent factors: mortality factor that varies with population density.
Density
________- dependent birth and death rates are an example of negative feedback that regulates population growth.
Population ecology
the study of populations in relation to their environment
Population
a group of individuals of a single species living in the same general area
Density
the number of individuals per unit area or volume
Dispersion
the pattern of spacing among individuals within the boundaries of the population
Clumped
members of a population are clustered in groups
Uniform
members of a population are dispersed relatively evenly
Random
members of a population are distributed without a predictable pattern
Semelparity
produce all offspring in single reproductive event
Iteroparity
reproduce in successive years or breeding seasons
Seasonal iteroparity
distinct breeding seasons
Continuous iteroparity
reproduce repeatedly at any time of the year
Exponential population growth
population increase under idealized conditions
Carrying capacity(K)
the maximum population size the environment can support
Density-dependent factors
mortality factor that varies with population density
Density-independent factors
mortality factor whose influence is not affected by changes in population size or density
Physical factors
weather, drought, flood, fire
r-selection
density-independent selection, selects for life history traits that maximize reproduction
K-selection
density-dependent selection, selects for life history traits that are sensitive to population density
