Lab 4
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population
group of indviduals from the same species that cooccur in space and time
what happens if total number of individuals that were born or immigrated is greater than the number of individuals that died or emigrated
pop will grow
what happens if total number of individuals that were born or immigrated is less than the number of individuals that died or emigrated
pop will decrease
if a organism produces few offspring and invests in care
high survival of young curve 1
organism produces large amount of offspring invests little in care
low survival of young curve 3
equal death rate throughout all stages of life
Curve 2
How to create cohert life table
follow each member of this cohert and track when it dies impossiuble, very difficult
how to create static life table
age at time of death recorded for group born at different times
when does exponential growth take place?
when pop sizez small or little to no comp for resources
exponential growth variables dn/dt r N Nt N0 t
dN/dt=rate of population growth r= per capita rate of increase N=pop size Nt=number of individuals at given time t=# time intervals
what remains constant in exponential growth
r
when does logistic population growth occur
when there is an upper limit to pop growth
what is a density dependent factor
factors who’s effects are dependent on density of population
K
carrying capacity the theoretical maximum size of the population at a particular location
rmax
maximum per capita rate of increase under ideal conditions