The Economy Of Nature 6th Edition By Ricklefs – Test Bank

Question The elephant seal made a remarkable recovery from the brink of extinction, increasing from1900 to 150,000 in 2000. The value of r for this species over this time period was 0.073 per capita pethe doubling time for this species?
Answer 7.3 years
9.45 years
1500 years
Doubling time cannot be determined from the data provided.
Question 32
Multiple Choice
Question How is r related to r0 in the logistic model of population growth?
Answer A) r = r0N
r = r0N(1 – N/K)
r = r0(1 – N/K)
r = r0
Question 33
Multiple Choice
Question When a population grows according to the logistic model, what is the value of r when the pAnswer A) r = r0
r = 0
r = K
r = N
Question 34
Multiple Choice
Question When a population grows according to the logistic model, at what population size does dN/Answer N = K
N = K/2
N = r0
N = ∞
Question 35
Multiple Choice
Question When a population grows according to a logistic model, at what size is its growth rate maxiAnswer N = K
N = K/2
C) N = r0
N = ∞

Question 36
Multiple Choice
Question When a population grows according to a logistic model, what happens if the population exccapacity?
Answer The population resumes exponential growth.
The size of the population remains constant.
The size of the population begins to decline.
The population goes extinct.
Question 37
Multiple Choice
Question A logistic growth model assumes population growth is density-__________.
Answer dependent
independent
neutral
Question 38
Multiple Choice
Question Which stages of life in a population are often found to suffer more from the adverse effectsdependent factors?
Answer juvenile stages
adult stages
both juvenile and adult stages about equally
Question 39
Multiple Choice
Question Population growth rates sometimes increase with increasing population density, especially densities, as seen in certain fish stocks. We refer to this kind of population response as __________.Answer positive density dependence
negative density dependence
juvenile recruitment
self-thinning
Question 40
Multiple Choice
Question Studies of many plant populations show that, as plants grow larger and experience crowdinwhile the survivors grow larger. When average dry weight per plant is plotted against the number of s(both on log scales) the result is a linear relationship with negative slope, described by the _________Answer -1/4 power law
-1/2 power law
-3/4 power law
-3/2 power law
Question 41
Multiple Choice
Question Select from the following list the author who first wrote: “As more individuals are produced tsurvive, there must in every case be a struggle of existence, either one individual with another of the with the individuals of distinct species, or with the physical conditions of life. It is the doctrine of Malthmanifold force to the whole animal and vegetable kingdoms; for in this case there can be no artificial iand no prudential restraint from marriage. Although some species may be now increasing, more or lenumbers, all cannot do so, for the world would not hold them.”
Answer Robert Ricklefs
Charles Darwin
Thomas Malthus
Thomas Wentworth
Question 42
Multiple Choice
Question
On its current web site, the Population Reference Bureau1 offers a comparison between two countrieDemocratic Republic of the Congo in central Africa. Both countries had similar-sized populations in min the following table. However, the two countries could not be more unlike one another in other demoparameters. For example, the crude birth and death rates (B and D) for Italy are currently 9 and 10 perespectively. The comparable crude birth and death rates for the Democratic Republic of the Congo a1,000 persons, respectively.
What is λ for the Democratic Republic of the Congo (to three decimal places)?
Answer 0.031
1.031
31.000
131.000
Question 43
Multiple Choice
Question
On its current web site, the Population Reference Bureau1 offers a comparison between two countrieDemocratic Republic of the Congo in central Africa. Both countries had similar-sized populations in min the following table. However, the two countries could not be more unlike one another in other demoparameters. For example, the crude birth and death rates (B and D) for Italy are currently 9 and 10 perespectively. The comparable crude birth and death rates for the Democratic Republic of the Congo a1,000 persons, respectively.
What is r for the Democratic Republic of the Congo (to four decimal places)?
Answer 0.0305
0.0310
1.0310
31.0000