Exam 3

Question 1

K

Answer 1

• carrying capacity
• the max number of individuals an environment can stably support
• competition is dealt with indirectly

Question 2

addition to the logistic model

Answer 2

intraspecific competition added

Question 3

two types of yeast

Answer 3

Saccharomyces and schizosaccharoyces

Question 4

Gause’s experiment

Answer 4

studied interspecific competition with yeast. The two species competed for resources (implies presence of intraspecific competition as well)

Question 5

Lotka-volterra model

Answer 5

modification of logistic model with interspecific competition which is expressed in unit of the other species and resource use

Question 6

alpha

Answer 6

species 2 expressed in units of species 1 (in terms of recourse use)

Question 7

beta

Answer 7

species 1 expressed in units of species 2

Question 8

Allee effect

Answer 8

population at low density can have an increase in r as they grow (example: Kirtlands warbler)

Question 9

time lag (mathematically)

Answer 9

Actual time when r=0 and expected time of r=0

Question 10

logistic model in linear form

Answer 10

y= (1/N)(dN/dt)
b= rmax
m= - Rmax/K
x= N