topic 11 Flashcards
what does population mean?
All of the individuals of a given species that live and reproduce in a particular place
what does population size mean?
the number of individuals alive at a particular time in a particular place
what is population size influenced by?
birth, death, immigration, emigration
what is Rmax?
intrinsic rate of increase
what can Rmax be varied by?
time to reproductive maturity
gestation time
lifespan
what limits population growth?
food
predators
disease
shelter
precipitation
temperature
what is carrying capacity?
the max population size an environment can carry
what determines the growth rate?
how close the population size is to the carrying capacity
what is population growth influenced by?
density dependant factors
density independent factors
what do biotic factors include?
competition
interactions
what are density dependant factors?
biotic
what are density independent factors?
abiotic
what does abiotic factors include?
temperature
precipitation
disturbance
when do density independent factors have an affect?
in any population
when do density dependent factors have an affect?
as N becomes large
