Unit 3 Vocab

apes unit 3 vocab :))

Carrying Capacity (k)

the limit of how many individuals in a population the environment can sustain

Crude Birth Rate (CBR)

the number of births per 1,000 individuals per year

Crude Death Rate (CDR)

the number of deaths per 1,000 individuals per year

Density-dependent Factor

a factor that influences an individual’s probability of survival and reproduction in a manner that depends on the size of the population

Density-independent Factor

a factor that has the same effect on an individual’s probability of survival and the amount of reproduction at any population size

Family Planning

the practice of regulating the number or spacing of offspring through the use of birth control

Intrinsic Growth Rate (r)

the maximum potential for growth of a population under ideal conditions with unlimited resources

k-selected Species

a species with a low intrinsic growth rate that causes the population to increase slowly until it reaches carrying capacity

r-selected Species

A species that has a high intrinsic growth rate, which often leads to population overshoots and die-offs

Replacement-level Fertility

the total fertility rate required to offset the average number of deaths in a population in order to maintain the current population size

Theory of Demographic Transition

the theory that as a country moves from a subsistence economy to industrialization and increased affluence, it undergoes a predictable shift in population growth

Total Fertility Rate (TFR)

an estimate of the average number of children that each woman in population will bear throughout her childbearing years

Type I Survivorship Curve

a pattern of survival over time in which there is high survival throughout most of the life span, but then individuals start to die in large numbers as they approach old age

Type II survivorship curve

a pattern of survival over time in which there is a relatively constant decline in survivorship throughout most of the lifespan

Type III survivorship curve

a pattern of survival over time in which there is low survivorship early in life with few individuals reaching adulthood