bio ch 52 (.1, .2, .3)

population

a group of individuals of a single living species living in the same general area

population density

number of individuals per unit area of volume

births

tied to population density

deaths

tied to population density

immigration

tied to population density

emigration

tied to population density

population dispersion

the pattern of spacing among individuals within boundaries of population

clumped

most common, often grouped together because of available resources, example is United States

uniform

influenced by territoriality, example is squirrels

random

example is dandelion seeds

demography

study of the vital statistics of population and how they change over time

growth rate equation

r = b - d or r = B/N - D/N

life table

age specific summary of the survival pattern of a population, constructed by following fate of a cohort

semalparity

one shot, big bang reproduction, grow big - seeds - die

iteroparity

repeated reproduction, like humans

equation

dN/dt = rN (EQUATION to remember!)

carrying capacity

when the environment can't support any more individuals the population is said to be at its _________

example of density independent factor

birth rate

example of density independent factor

competition for resources, territoriality, etc

equation for r

r = b - d

equation with carrying capacity

change N/change t = r times N times (K-N)/K

equation with time

change in N/change in t = rN

fercundity

ability to reproduce