Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 27.1, Problem 1HYEW
Summary Introduction
To determine:
How many children can a woman bear.
Introduction:
The maximum rate by which a
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INTRODUCTION:
The environment may be changed by the things within the biotic community, as well as relationship between organisms and the nonliving environment. The carrying capacity of an ecosystem is the maximum number of organisms that an area can support over time. The density of a population may cause huge changes in the environment so that the environment becomes unstable for the survival of that species. Humans can mess up natural selection and have either a positive or negative effect.
OBJECTIVES
Graph data on the Kaibab deer population of Arizona from 1905-1939.
Analyze the factors that caused the changes in the deer population.
PROCEDURE:
Before 1905, there was an estimated 4000 deer on almost 30,000 hectacres of land on the Kaibab Plateau in Arizona. The average carrying capacity of the land at that time was estimated to be about 30,000 deer. Being concerned about the low number of deer, President Theodore Roosevelt created the Grand Canyon National Game Preserve to…
Mathis Wackernagel and his colleagues at the Global FootprintNetwork continue to refine the method of calculatingecological footprints—the amount of biologically productiveland and water required to produce the energy and natural resourceswe consume and to absorb the wastes we generate.According to their most recent data, there are 1.8 hectares(4.4 acres) available for each person in the world, yet we useon average 2.7 ha (6.7 acres) per person, creating a globalecological deficit, or overshoot (p. 4), of 50%.Compare the ecological footprints of each nation listed inthe table. Calculate their proportional relationships to the worldpopulation’s average ecological footprint and to the area availableglobally to meet our ecological demands.
Based on the data in the table, how do you think averageper capita income is related to ecological footprints?Name some ways in which you believe a wealthy societycan decrease its ecological footprint.
Choose the statement that is most likely made by an environmentalist rather than by an environmental scientist.
"On average, 52 animal species move one step closer to extinction each year because of overpopulation and habitat destruction.”
“Human population growth is a current environmental issue, as is climate change.”
“When the number of existing humans exceeds the carrying capacity of the planet, we have reached the state of overpopulation.”
“Citizens must take matters into their own hands and start having fewer children to reduce the world’s population, starting now.”
Chapter 27 Solutions
Biology
Ch. 27.1 - Prob. 1CSCCh. 27.1 - Prob. 1HYEWCh. 27.1 - The Return of the Elephant Seals Female elephant...Ch. 27.1 - Prob. 1CYLCh. 27.1 - describe how the growth rate interacts with...Ch. 27.1 - Prob. 3CYLCh. 27.2 - What factors might make these population data...Ch. 27.2 - Prob. 2TCCh. 27.2 - What benefits does mass emigration give to animals...Ch. 27.2 - Prob. 1CSC
Ch. 27.2 - Prob. 1CYLCh. 27.2 - Prob. 2CYLCh. 27.2 - Prob. 3CYLCh. 27.3 - Prob. 1CYLCh. 27.3 - Prob. 2CYLCh. 27.3 - Prob. 3CYLCh. 27.4 - Prob. 1CYLCh. 27.4 - Prob. 1CTCh. 27.5 - Prob. 1TCCh. 27.5 - Prob. 2TCCh. 27.5 - Prob. 3TCCh. 27.5 - describe the advances that have allowed...Ch. 27.5 - explain why rapid population growth continues...Ch. 27.5 - Prob. 3CYLCh. 27.5 - Prob. 4CYLCh. 27 - Prob. 1MCCh. 27 - Prob. 2MCCh. 27 - Prob. 3MCCh. 27 - Prob. 4MCCh. 27 - Prob. 5MCCh. 27 - Prob. 1FIBCh. 27 - The type of growth that occurs in a population...Ch. 27 - Prob. 3FIBCh. 27 - The type of spatial distribution likely to occur...Ch. 27 - Prob. 5FIBCh. 27 - Prob. 1RQCh. 27 - Prob. 2RQCh. 27 - Draw, name, and describe the properties of a...Ch. 27 - Prob. 4RQCh. 27 - What is logistic population growth? What is K?Ch. 27 - Prob. 6RQCh. 27 - Distinguish between populations showing concave...Ch. 27 - Prob. 8RQCh. 27 - Prob. 9RQCh. 27 - Prob. 1ACCh. 27 - Prob. 2AC
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