Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Chapter 53, Problem 11TYU
EVOLUTION CONNECTION Contrast the selective pressures operating in high-density populations (those near the
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Calculate the rate of population change for a hypothetical population of wildebeest using the logistics equation and carrying capacity equation. How can you explain these results?
N = 500, r = 0.1, K = 1000, calculate dN/dt.
Contrast the selective pressures operating in high-density populations (those near the carrying capacity, K ) versus low-density populations.
Which of the following statements with respect to competition coefficients is false?
If the carrying capacity for species 1 is 1000 individuals, a12 = 0.5 and we add
200 individuals of species 2, the equilibrium population for species 1 will be 800
If the carrying capacity for species 1 is 1000 individuals, a12 = 0 and we add 200
individuals of species 2, the equilibrium population for species 1 will be 1000
%|
O If the carrying capacity for species 1 is 1000 individuals, a12 = 2 and we add 200
individuals of species 2, the equilibrium population for species 1 will be 60O
%3D
O None of the other answers are false-all are true
OA competition coefficient describes the per capita effect on the growth of one
species by another species
Chapter 53 Solutions
Campbell Biology
Ch. 53.1 - DRAW IT Each female of a particular fish species...Ch. 53.1 - Prob. 2CCCh. 53.1 - Prob. 3CCCh. 53.2 - Explain why a constant per capita rate of growth...Ch. 53.2 - Prob. 2CCCh. 53.2 - Prob. 3CCCh. 53.3 - Explain why a population that fits the logistic...Ch. 53.3 - WHAT IF? Given the latitudinal differences in...Ch. 53.3 - Prob. 3CCCh. 53.4 - Identify three key life history traits, and give...
Ch. 53.4 - Prob. 2CCCh. 53.4 - Prob. 3CCCh. 53.5 - Prob. 1CCCh. 53.5 - Prob. 2CCCh. 53.5 - WHAT IF? Suppose you were studying a species that...Ch. 53.5 - Prob. 4CCCh. 53.6 - How does a human population's age structure affect...Ch. 53.6 - How have the rate and number of people added to...Ch. 53.6 - WHAT IF? Type "personal ecological footprint...Ch. 53 - Gray whales (Eschrichtius robustus) gather each...Ch. 53 - Suppose one population has an r that is twice as...Ch. 53 - Prob. 53.3CRCh. 53 - Prob. 53.4CRCh. 53 - Density-dependent factors regulate population...Ch. 53 - The human population is no longer growing...Ch. 53 - Population ecologists follow the fate of same-age...Ch. 53 - A population's carrying capacity (A) may change as...Ch. 53 - Scientific study of the population cycles of the...Ch. 53 - Analyzing ecological footprints reveals that (A)...Ch. 53 - Based on current growth rates, Earth's human...Ch. 53 - The observation that members of a population are...Ch. 53 - According to the logistic growth equation...Ch. 53 - During exponential growth, a population always (A)...Ch. 53 - Prob. 9TYUCh. 53 - Prob. 10TYUCh. 53 - EVOLUTION CONNECTION Contrast the selective...Ch. 53 - Prob. 12TYUCh. 53 - Prob. 13TYUCh. 53 - WRITE ABOUT A THEME: INTERACTIONS In a short essay...Ch. 53 - SYNTHESIZE YOUR KNOWLEDGE Locusts (grasshoppers in...
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- Do density independent and/or density dependent result in carrying capacity for populations?arrow_forwardWhich graph best displays the patterns of population abundances as a result of the Lotka-Volterra predator-prey model. The black line represents the PREY population, and the grey line represents the PREDATOR population. x-axis for all graphs = Time а. Graph D O b. Graph C С. Graph A O d. Graph B y-axes = Prey or Predator abundancearrow_forwardWhich of the following would not be an example of density-deperident factors regulating population size? The number of possible territories for robins is limited; thus when population sizes are high, a lower proportion of individuals can produce offspring. A. O B. In conditions of overcrowding, some desert pupfish living in ponds will emigrate to other ponds if given the opportunity. C.Predation on mosquitofish is high, regardless of population size. D. In conditions of high density, mice are more susceptible to mortality from heat stress. E. In a habitat patch with a high density of muskrats, a disease spreads more rapidly and results in higher mortality.arrow_forward
- The following pattern(s) of population dynamics is(are) produced from the Lotka- Volterra model assuming exponential increase in the prey population in the absence of predators, and exponential decline in the predator population in the absence of prey. а. Stable cycles b. Chaos O c. Equilibrium O d. Damped Oscillations O e. More than one of the above is possiblearrow_forwardCompare exponential J-curve growth (line A) to logistic S-curve growth (line B). Explain the conditions under which each might occur in might. ✓ ✓ A Carrying Capacity (K) it Number of Individuals B Timearrow_forwardIn populations of unitary organisms, growth rates and rates of development are generally influenced by intraspecific competition. This essentially leads to density-dependent effects on the composition of a population. 1) Explain/discuss figure b (limpets) 2) Explain/discuss figure a (reindeers)arrow_forward
- Based on the equation for logistic population growth, Logistic Growth O A. new Individuals are added most rapidly at low population sizes. This figure displays the equation for logistic population growth and visualizes population growth as a function of time (number of generations) as it approaches carrying capacity. N stands for population size, K stands for carying capacity, and r stands for intrinsic rate of increase. O B. population growth never exceeds K. C. growth rate decreases as N approaches K. D. the population keeps growing when N equals K. K= carrying capacity dN (K-N) dt Number of generations ered MacBook Air F10 F11 吕口 F3 888 F4 F5 F1 F2 $ % & * @ 7 9 2 4 Y P Q W E R F G H K A S D C V N M Z .. * CO B #3 Population size (M)arrow_forwardGiven your understanding of life histories and population dynamics, propose some ideas for how different types of organisms might respond (in terms of population dynamics) to these different conditions: climate change, land-use change, and pollution that are eliminating and transforming habitats worldwide.arrow_forwardgive natural examples of density-independent Population regulation (e.g. aquatic weed in South America etc.)arrow_forward
- Based on the graph, did the zebra population growth rate (dN/dt) differ in the years 1985 and 2003? Why or why not? (Hint: dN/dt is equal to the slope of the curve showing population size, N, over time, t.)arrow_forwardListen If f(A) = 0.8 and f(a) = 0.2, what is the frequency of aa if the population is at Hardy- Weinberg equilibrium? %3D O 0.04 O 0.2 0.16 0.32 0.64arrow_forwardThink about a predator-prey system that perfectly follows Lotka-Volterra dynamics. The search efficiency parameter (a) represents how quickly the predator finds and kills its prey. What would happen if most the predator population had a parasite that made them less effective predators? Infected animals find and kill prey less frequently (that is, the parasite caused the value of the search efficiency parameter to decline). the populations would still cycle; the amplitude of prey and predator would increase Othe populations would no longer cycle; the prey would increase and the predator would go extinct the populations would no longer cycle; the prey would go extinct and the predator would increase the populations would still cycle; the amplitude of prey and predator would decline the predator and prey populations would no longer cycle; the parasite and the predator populations would cycle insteadarrow_forward
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