APPLY YOUR KNOWLEDGE Human populations are subject to the same population control factors in the environment that lmpact natural populations. For example, during the 14th century, the bubonic plague killed approximately one- third of the human population. A. Is the bubonic plague an example of a dènsity-dependent or density-independent factor? Explain. B. Two-thirds of the population survived the bubonic plague, even though many of the survivors were most likely bitten by disease-carrying fleas. In terms of evolution, explain how it was possible to be a survivor. C. Discuss two ways that humans have increased the carrying capacity of their population.

APPLY YOUR KNOWLEDGE Human populations are subject to the same population control factors in the environment that lmpact natural populations. For example, during the 14th century, the bubonic plague killed approximately one- third of the human population. A. Is the bubonic plague an example of a dènsity-dependent or density-independent factor? Explain. B. Two-thirds of the population survived the bubonic plague, even though many of the survivors were most likely bitten by disease-carrying fleas. In terms of evolution, explain how it was possible to be a survivor. C. Discuss two ways that humans have increased the carrying capacity of their population.

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter40: Population Ecology

Section: Chapter Questions

Problem 1SA: Most commonly, individuals of a natural population show a __________ distribution through their...

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INTERPRET DATA Examine the top and middle graphs in Figure 54-5. Are these examples of exponential or logistic population growth? Where is K in each graph? (You may need to refer to Chapter 53 to answer these questions.) RESULTS AND CONCLUSION: The top and middle graphs show how each species of Paramecium flourishes when grown alone. The bottom graph shows how they grow together, in competition with each other. In a mixed culture, P. aurelia outcompetes P. caudatum, resulting in competitive exclusion. SOURCE: Adapted from G.F. Gause, The Struggle for Existence (Williams and Wilkins, Baltimore, 1934). Figure 54-5 G.F. Gauses classic experiment on interspecific competition
Figure 45.2 As this graph shows, population density typically decreases with increasing body size. Why do you think this is the case?
______ is a density-independent factor that influences population growth. a. Predation b. Infectious disease c. Resource competition d. Harsh weather
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