r or K selected
Reach sexual maturity quickly
r-selected
Light
Independent
IMF
Infant Mortality Rate
This type of offspring will live for a long period of time than eventually they will start to die off.
Type I species
This is the number of individuals in a population that inhabit a certain unit of land or water area.
population density
This stage has equal CBR and CDR, and low life expectancy
Stage 2 or Industrializing/Transitional
This is the movement of people out of a population.
Emigration
Tend to be invasive
r-selected
Hurricane
Independent
CBR
Crude Birth Rate
These offspring die young, but if they live to a certain age, they will live a longer life.
Type III
The time it takes for a population to double can be approximated by dividing this by the current growth rate of the population.
Rule of 70
This stage has equal CBR and CDR, and low life expectancy
Stage 1 or Pre-Industrial
sharp decrease in pop. size when resource depletion leads to many individuals dying
die-off
Fewer offspring
K-selected
Predation
Density Dependent
CDR
Crude Death Rate
This type of offspring has a 50-50 chance of surviving to old age.
Type II
This is how individuals of a population are spaced within a region.
population dispersion
CBR decreases and stable growth occurs during this stage
Stage 3 or Industrialized
If your population is growing at 2% it will take how many years for your population to double.
70/2 = 35 years
High level of parental care
K-selected
Disease
Dependent
TFR
Total Fertility Rate
Name 2 Type II species.
birds or squirrels
This is the maximum number of individuals an ecosystem can support
carrying capacity
This stage has more elderly people and the government may encourage immigration or incentives to have more children.
Stage 4 or Post-Industrial
This is the number of children a woman in a given population will bear during her lifetime.
Total fertility rate
Name an r-selected species and a K-selected species
r- insects, turtles, fish
K-any mammal
Competition
Dependent
RNI (r)
Rate of natural increase
This a line that shows the survival rate of a cohort.
Survivorship Curve
A population curve line at the top of the graph demonstrates this limit, and any population that exceeds it will go into this.
Overshoot
This is the average TFR replacement level
2.1
What is the formula to calculate population change?
(Births + Immigration) - (Deaths + Emigration)