2.2 Pop Eco Flashcards
How population growth is determined from birth, death, immigration, and emigration?
The population growth goes up when there are more births and immigration. The population growth goes down when there are more deaths and emigration.
What is a logistic growth model?
Growth with limiting factors.
What is an exponential growth model?
Growth without limiting factors.
What does N stand for?
Population size
What does r stand for?
A constant representing the maximum per capita growth rate.
What does t stand for?
A variable representing time.
What does K stand for?
Carrying capacity
What does dN/dt stand for?
A quantity representing the population growth rate.
What does N subscript 0 stand for?
A constant representing the initial population size.
Density-dependent limiting factor definition?
Effect is dependent on the density of the population.
Density-independent limiting factor definition?
Effect is not related to/is independent of the density of the population.
Examples of density-dependent limiting factors?
-Competition
-Social behavior
-disease
Examples of density-independent limiting factors?
-Sun light
-Rainfall
-Natural disasters
How does a exponential growth model change when r changes?
When r increases it takes the same value regardless of the population size.
How does an exponential growth model change when N changes?
The growth rate stays the same regardless of the population size.
