Exam 2 Quiz Practice Questions.docx

Question 1 Which of the following is NOT a good situation for a transect method of sampling abundance: Organisms are difficult to observe Terrain is difficult to move through Organisms are mobile Question 2 Using the geometric model (remember λ = 1+b-d) What is the population size at t = 1, where: No = 4 b = 2 d = 0 12 16 36 8 Question 3 Using the geometric model (remember λ = 1+b-d) What is the population size at t = 2, where: No = 4

b = 2 d = 0 12 16 36 8 Question 4 What does the "r" in this equation refer to? N t =N o e rt intrinsic growth rate population size birth rate Question 5 λ Consider the following population growth model N t =N O * λ t Which of the following statements is true about this model? It includes the "Malthusian parameter" It includes the "instantaneous rate of increase" It includes the "intrinsic rate of increase"

It includes the "finite rate of increase" Question 6 Match the following equations to the statements below. Not all equations must be used, and an equation may be used more than once. Vital rates are constant; births and deaths are happening continuously Vital rates are changing as the population grows The logistic equation The equation for density-dependent population growth A discrete time equation 1 . Nt+1 = λ Nt 2 . dN/dt = rN 3 . dN/dt = rN [(K-N)/ K] Question 7 When a population is at carrying capacity... Birth rates are lower and/or death rates are higher than when the population is smaller. Competition is expected to be at its highest. Population size is stable. All of the above. 2 3 3 3 1

Question 8 You are studying a population and you wonder if birth rates are density-dependent. How would you test for that? Test whether birth rates are stable Test for a relationship between birth rate in a year and population size in that year Test for environmental variation in birth rates Question 9 The 'K' in the logistic equation... refers to carrying capacity indicates the size at which the population will stop growing is associated with the 'K' life history strategy all of the above Question 10 Density-INDEPENDENT population regulation is predicted to be associated with: An 'r-strategy' life history A low resource environment A high competition environment

Question 11 Based on the transition matrix and associated diagram below: If you have 100 of each stage this year, how many of B do you have next year? 70 10 1 7 Question 12 Based on the transition matrix and associated diagram below: Could this matrix be AGE-structured? Yes No There is not enough information to say

Question 13 A sensitivity analysis... quantifies the change in population growth rate as a result of a change in a vital rate calculates the probability that a population will go extinct identifies the maximum sustainable harvest Question 14 The figures below show different patterns of survivorship for different species. Match the descriptions to the types of survivorship shown. Most individuals die at an early age Most individuals survive to old age Individuals die at a constant rate 1 . Type I 2 . Type II 3 . Type III Question 15 Your are studying an age-structured population, and you notice that while vital rates (transition rates) do NOT change from one year to the next, the age distribution is not the same from one year to the next. What does this mean for the population? The population is not at stable age distribution and will fluctuate until it reaches that state The population is affected by environmental variability 3 1 2

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