Unit 3 Flashcards
(30 cards)
Population
all the inhabitants of a particular town, area, or country.
Population density
the amount of organisms are in a population
Distribution
the action of sharing something out among a number of recipients.
Exponential growth
growth whose rate becomes ever more rapid in proportion to the growing total number or size
Carrying capacity
the number of people, other living organisms, or crops that a region can support without environmental degradation.
Natality
birth rate
Mortality
Death
Immigration
the action of coming to live permanently in a foreign country.
Emigration
the act of leaving one’s own country to settle permanently in another
Limiting Factors
Limiting Factors
Replacement Level
the amount of fertility needed to keep the population the same from generation to generation
Demographers
the statistical study of human populations
Life expectancy
the average number of years that a group of persons
Age Structure
The composition of a population in terms of the proportions of individuals of different ages
Fertility rate
the number of children born alive to women of that age during the year
Tragedy of the Commons
economical theory that postulates that individuals tend to exploit shared resources such that the demand greatly outweighs supply
Ecological Footprint
how fast we consume resources and generate waste compared to how fast nature can absorb our waste and generate resources
What are the three different types of population dispersion?
Uniform dispersion
Random dispersion
Clumped dispersion
What is an example of a population?
the entire student body at a school
When does a population pass the carrying capacity?
when the maximum population size is reached for a given area with limited resources
What factors decrease the population growth rate?
limitations in food, predation, and disease
What is the shape of an exponential growth curve?
j
What is the shape of a logistic growth curve?
s
What are the 3 phases of logistic growth?
an initial establishment phase in which growth is slow, a rapid expansion phase in which the population grows relatively quickly, and a a long entrenchment stage in which the population is close to its limiting population
