035 Unit 3 Flashcards
(30 cards)
Population
The same species in a group
Population density
The species in a specific geographic locale
Distribution
The process of getting goods to consumers
Exponential growth
A growth rate in population to the growing total number or size
Carrying capacity
a species’ average population size in a particular habitat.
Natality
the ratio of brith to the population of that area
Mortality
The deaths in specific age group
Immigration
A different species moving into a different land
Emigration
A species moving out of that area
Limiting Factors
anything that constrains a population’s size and slows or stops it from growing.
Replacement Level
is the amount of fertility needed to keep the population the same from generation to generation
Demographers
a person who studies changes in numbers of births, marriages, and deaths
Life expectancy
is a statistical measure of the average time an organism is expected to live.
Age Structure
the proportion of the total population in each age group.
Fertility rate
is the number of children born alive to women of that age during the year as a proportion of the average annual population of women of the same age.
Tragedy of the Commons
Ecological Footprint
the impact of human activities measured in terms of the area of biologically productive land and water required to produce the goods assimilate the wastes generated.
What are the three different types of population dispersion?
The three different types of population dispersion are uniform, random, and clumped.
What is an example of a population?
An example of a population is the stars in the milky way galaxy.
When does a population pass the carrying capacity?
The population can surpass but there are limitations to the life sustaining resources earth can provide.
What factors decrease the population growth rate?
It can be predation, limitations in food, and other density dependent factors.
What is the shape of an exponential growth curve?
The shape is a J-shaped curve.
What is the shape of a logistic growth curve?
The logistic growth curve is an S-shaped curve.
What are the 3 phases of logistic growth?
The 3 phases are rapid expansion, an initial establishment phase and a long entrenchment stage.