Q3.32.
In the upland system (top graph), point A in the phase plane represents a situation in which:
A. Grass species 2 is much more abundant than grass species 1.
B. Grass species 1 is much more abundant than grass species 2.
C. Grass species 1 is growing much faster than grass species 2.
D. It's impossible to tell without seeing the phase plane graph over time.
Q3.34.
Consider the stable equilibrium you identified in the previous question. According to the Lotka-Volterra model, how do the relative strengths of intraspecific and interspecific competition impact equilibrium stability?
A. A stable equilibrium results when intraspecific competition is weaker than interspecific competition.
B. A stable equilibrium results when intraspecific competition is the same strength as interspecific competition.
C. A stable equilibrium results when intraspecific competition is stronger than interspecific competition.
D. The relative strengths of intraspecific and interspecific competition have no effect on equilibrium stability.
Q3.35.
In the system characterized by an
unstable
equilibrium, the outcome of competition depends on what?
A. The carrying capacities of the two species.
B. The competition coefficients (?) of the two species.
C. The initial population sizes of the two species.
D. The relative strength of competition between the two species.
Q3.36.
Observe initial conditions at points A and B (upland, top), and C and D (lowland, bottom). Which of these initial conditions will result in one of the species being driven to extinction?
A and B
A and C
C and D
B and D
Q3.37.
The per-capita competitive effect on Species F of Species G,?
FG, is 0.8. Based on this information alone, which is most likely to be true about Species F and G?
A. Because
?
FG
< 1,="" species="" f="" is="" the="" stronger="">
B. Individuals of Species F are affected more strongly by competition with Species G than by competition with members of their own species.
C. An additional 100 individuals of Species G will reduce the equilibrium population size of Species F by 80, regardless of initial population sizes.
D. A stable equilibrium between Species F and G will occur if
?
GF
is also equal to 0.8.