2.2 Flashcards
How is Population growth determined from birth, death, immigration, and emigration?
It determines the growth rate per capita, and how dense the population is.
What does a exponential graph look like?
It goes up slowly at first, and then speeds up and becomes vertical
What does a logistic graph look like?
It starts out slow, goes up fast, then levels out at the carrying capacity.
Where is population growth highest in a exponential graph?
Where the slope is steepest
Where is population growth highest in a logistic graph?
Where the slope is the highest
What does N mean?
Population size
What does N0 mean?
Initial population size
What does r mean?
Per Capita growth rate
What does K mean?
Carrying capacity
What does t mean?
time
What does dN/dt mean?
growth rate
What is a density dependent limiting factor?
It only impacts the population based on the density. Normally biotic
What is a density independent limiting factor?
Impacts the population no matter the density. Normally abiotic
How does a exponential growth model change when r is changed?
It is steeper sooner
How does a exponential growth model change when N is changed?
There are more organisms, so it could increase at a higher rate.
