Population Growth
Name two ways in which populations INCREASE in size.
Immigration and Births
When do density dependent factors operate more strongly?
When the population density is greater
Describe how a density dependent limiting factor affects different sized populations.
Affect all populations (regardless of size) in the same way.
True or False :
Human population growth rates are currently decreasing.
TRUE!
Any factor that controls the growth of a population is known as a
Limiting Factor
Which type of population growth would you expect to see in a population in which ALL resources are UNLIMITED?
Exponential
Stress from overcrowding is a density dependent limiting factor. This can lead to three negative affects on the population. Name one.
Neglect of offspring
Killing of offspring
Fighting
Do limiting factors stay the same over time?
NO!
Before the industrial revolution it was common for families to have LOTS of babies. Explain why this was the case.
Only a few were expected to survive
The maximum number of individuals that an environment can support is known as its...
carrying capacity
Name a factor that would NOT lead to exponential growth in a given population.
Competition
Disease
Predation
Describe why parasites are considered a density dependent limiting factor.
As the host population increases the parasites have more opportunities to spread.
Which of the following is an example of a density INdependent limiting factor?
Competition
Stress
Volcanic Eruption
Volcanic Eruption
Describe what has happened to the human population growth since the industrial revolution.
Human populations have grown more rapidly
The scientific study of human populations is ...
demography
What is the name of the growth curve that a population would exhibit once resources become limiting.
Logistic
Describe what would happen to the prey population of mice if the weasel population decreased significantly.
Likely increases as a result of the lack of predators.
Give two other examples of density independent factors.
Floods
Tornados
Extreme weather changes
Hurricanes
Wildfires
Exponential
The shift from high birth rates and death rates to low birth rates and death rates (as a result of technology and advancements) is known as...
Demographic Transition
Give 4 examples of density dependent limiting factors.
Competition (for food, water, resources)
Disease
Predation
Parasitism
Herbivory
Stress from overcrowding
Im all out of questions for this topic. What is Ms. Trenckmann's legal first name.
Elizabeth
What are three examples of things that CAN limit human population growth?
War (competition)
Famine (lack of resources / food)
Disease
Define population density.
The number of organisms per unit area.