logistic vs exponential Flashcards
What does an exponential model not possess?
limiting factors
What is a logistic growth?
a growth influenced by population size
What letter does an exponential graph “look like”? Logistic?
An exponential model “looks like “ a J. Logistic resembles more of a S shape
What is the formula for exponential growth?
dN/dt=rN
Logistic growth?
dN/dt = rN (K - N) / K
Where is the population growth the highest in a logistic model?
1/2 K (carrying capacity)
Where is the population growth the highest in a exponential model?
At the highest population point.
What happens when you increase r in an exponential model?
As you increase r, there is a larger population growth over a shorter period of time because there is more reproduction happening.
What about when you increase N?
The population size would increase faster because there are more individuals producing.
What happens when you increase r in a logistic model?
It becomes faster to reach the maximum population growth or the carrying capacity.
What happens when K decreases in a logistic model?
The population growth is limited.
What happens when K is increased?
A larger total population is able to be reached.
True or False;
The formula for logistic growth is dt/dN = rN (K-N) / K
False;
It is dN / dt = rN (K-N) / K
True or False;
Logistic growth resembles an S and exponential resembles a J
true
