In the logistic model of population growth, per capita growth rates are highest at __ densities and population growth rates are highest at ___ density (NOTE: assume ‘high’ refers to at or near K). A) low, intermediate B) low, low C) low, high D) None of the above are true
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A) low, intermediate
B) low, low
C) low, high
D) None of the above are true
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- During what phase of the growth curves in each diagram is the population just beginning to colonize an area? (C) a) Which type of population growth appears to continue unchecked? b) The growth curves in the Model are often referred to using the letters of the alphabet they resemble. The logistic growth curve is sometimes referred to as an S-curve. What letter would you use to describe the exponential growth curve? c) What causes the population to slow down during logistic growth? d) The maximum population an environment can sustain is affected by environmental factors that cause the population to level out or become stable. What term is used to describe this level of logistic growth? Diagram A-Exponential Growth Curve Population Numbers Exponential growth Lag phase Time Population Numbers Diagram B-Logistic Growth Curve Lag phase Time Carrying capacity (K) Pressure begins due to environmental resistanceA population that did not grow in close relation to the amount of resources available in the environment, and dramatically overshot the carrying capacity, would experience: A. logistic growth, such as shown on the S-shaped curve B. exponential growth, such as shown on the J-shaped curve C. unpredictable growth, such as shown on the ?-shaped curve D. exponential growth, such as shown on the S-shaped curve E.logistic growth, such as shown on the J-shaped curveThe per capita birth (b) and death (d) rates are measured for two populations across a range of population sizes in the attached figure. The equation for exponential growth rate is dN/dt=rN where the per capita growth rate is r=(b-d). The equation for logistic population growth rate is dN/dt=rN(1-N/K). With logistic growth, r varies as a function of the population size with density-dependent birth and/or death rates. See attached image If the death rate decreased, what would happen to the population trajectory for population A? a) increase faster b) increase slower c) decrease faster d) decrease slower
- A population that grew in close relation to the amount of resources available in the environment, would experience A. exponential growth, such as shown on the J-shaped curve B. logistic growth, such as shown on the S-shaped curve C. unpredictable growth, such as shown on the ?-shaped curve D.logistic growth, such as shown on the J-shaped curve E. exponential growth, such as shown on the S-shaped curveThe island of Isle Royale in Lake Superior has historically contained both moose and wolves. In recent years, the number of wolves has dwindled, leaving few predators for the moose. This has led to a large increase in the moose population on the island. The following information is from 2018. Using this information and the equation shown, the growth rate for the moose population on Isle Royale can be calculated. Based on the current population and the growth rate, what type of growth model would be expected? K = 2,000 moose N = 1,500 moose Rmax = 0.5 where: dt = change in time N=population size ax =maximum per capita growth rate of population K= carrying capacity A logistical growth model would best represent this population because the moose population will decrease over time. An exponential growth model would best represent this population because there are few predators for the moose on this island. A logistical growth model would best represent this population because the increase…When does the growth rate of a population following the logistic model equal zero?the logistic model is given as dN/dt = rN (1-N/K)
- The island of Isle Royale in Lake Superior has historically contained both moose and wolves. In recent years, the number of wolves has dwindled, leaving few predators for the moose. This has led to a large increase in the moose population on the island. The following information is from 2018. Using this information and the equation shown, the growth rate for the moose population on Isle Royale can be calculated. Based on the current population and the growth rate, what type of growth model would be expected? A - A logistical growth model would best represent this population because the moose population will decrease over time. B - An exponential growth model would best represent this population because there are few predators for the moose on this island. C - A logistical growth model would best represent this population because the increase in the number of moose would level off over time. D - An exponential growth model would best represent this population because the moose…You monitor the white-tailed deer population for the Wright State campus and woods and estimate 14 deer in the first year and 21 deer in the second year. (A) Assume the deer population is growing geometrically. Based on these data, what is geometric growth rate constant (A)? (B) Geometric growth patterns can also be modeled exponentially. If modeled exponentially, would you expect the exponential growth rate constant () to be greater than, less than, or equal to 0? Why? You monitor the deer population for many years. The population grows for a few more years, then seems to stabilize around 75 deer. (C) Given this information, what would be a more appropriate model for the deer population growth? Why? (D) What factors might be limiting the population growth? Would these factors be considered density-dependent or density- independent factors? Why? it is equal to zero. The correct answer is not displayed for Written Response type questions. Hide Feedback (A) Check geometric growth…dN/dt= rmaxN [(K – N)/K] represents:a.annual growth rate.b.geometric population growth.c.exponential growth rate.d.logistic growth.e.none of the choices apply.
- Use this graph of the idealized exponential and logistic growth curves to complete the following. a. Label the axes and curves on the graph.b. What does the dotted line represent? c. For each curve, indicate and explain where population growth is the most rapid. d. Which of these curves better represents global human population growth?Nt= N0 t represents:a.geometric population growth.b.annual growth rate.c.exponential growth rate.d.logistic growth.e.none of the choices apply.In a graph of population size versus time, a J-shaped curve is characteristic of (a) exponential population growth (b) logistic population growth (c) zero population growth (d) replacement-level fertility (e) population growth momentum