2.2 Population Growth Study Guide Flashcards
What Does t stand for
time
What does K stand for
carrying capacity
What does dN/dt stand for
population growth rate
What does r stand for
growth rate per capita
What does N stand for
population size
Does logistical growth or expionential growth have K
logistical growth
What happens when N approches K
it levels off
Which limiting factor has abiotic factors
Density Independent
What limiting factor relies on how dense the population is
Density Dependent
What limitying factor doesn’t rely on how dense the population is and will affect the population size no matter how dense it it
Density Independent
A drought is an example of what limiting factor
Density Independent
Water competition is an example of what limiting factor
Density Dependent
What is the formula of expionential growth
dN/dt=1.0N or population growth rate = 1.0 x population size
What is the formula of logistical growth
dN/dt=rN(K-N)/K or population growth rate = growth rate per capita(carrying capacity - population size) / carrying capacity
Does r change based on time and population size
as the population grows and becomes more crowded, per capita birth rate tends to decrease and death rate to increase, and so r decreases toward zero
What does No stand for
initial population size
How does birth rate death rate Immigration and Emigration affect population size
populations gain individuals through births and immigration they lose individuals through deaths and emigration these factors together determine how fast a population grows
What happens when there are more deaths and emigrations to births and immigration
the population goes down
