Population Ecology

Population Ecology The Lotka-Volterra competition model is simply a modification of the logistic model. To capture the effect of a competitor on another species, The Lotka-Volterra equation adds a new term. a. What is the name of this term, and b. what is the symbol used? The zero growth isocline line for Species A represents all the combinations of population sizes of Species A and Species B (who is a competitor of Species A) for which the growth of Species A is zero. True or False? Assign the appropriate arrow set to each of the quadrants identified on the graph below: Does arrow set 1, 2, or 3 represent quadrant A? Does arrow set 1, 2, or 3 represent quadrant B? Does arrow set 1, 2, or 3 represent quadrant C? Using the graph below, answer the following questions: Which point (A, B, or C) represents the point at which Species 2 has competitively excluded Species 1? Which point (A, B, or C) represents the point at which Species 1 has competitively excluded Species 2? Which point (A, B, or C) represents the point at which Species 1 and Species 2 coexist? A common model to capture the dynamics of the host-parasite interactions is known as the SIR model. What does S represent? What does I represent? What does R represent? In modeling host-parasite interactions, the parameter R0 is the mean number of new infections caused by a single infective individual. If R0 is less than 1, will disease incidence increase or decrease? Define the following terms: Mutualism Commensalism Ecological Release Niche Partitioning Character Displacement Competitive Exclusion Principle Contiguous Allopathy