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Ch. 53 - Population Ecology
Chapter 53, Problem 4

Analyzing ecological footprints reveals that a. Earth's carrying capacity would increase if per capita meat consumption increased. b. current demand by industrialized countries for resources is much smaller than the ecological footprint of those countries. c. it is not possible for technological improvements to increase Earth's carrying capacity for humans. d. the ecological footprint of the United States is large because per capita resource use is high.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Ecological Footprint

The ecological footprint measures the environmental impact of an individual, community, or country, expressed in terms of the amount of land and water area required to produce the resources consumed and absorb the waste generated. It helps assess sustainability by comparing resource consumption with Earth's ecological capacity.
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Carrying Capacity

Carrying capacity refers to the maximum number of individuals of a species that an environment can sustainably support without degrading the ecosystem. It is influenced by resource availability, environmental conditions, and human activities, and is crucial for understanding the limits of population growth and resource use.
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Estimating Earth’s Human Carrying Capacity

Resource Consumption

Resource consumption encompasses the use of natural resources, such as water, energy, and raw materials, by individuals or societies. High per capita resource consumption, particularly in industrialized nations, contributes significantly to ecological footprints and can lead to unsustainable practices that threaten environmental health.
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Related Practice
Textbook Question

Population ecologists follow the fate of same-age cohorts to a. determine a population's carrying capacity. b. determine the birth rate and death rate of each group in a population. c. determine if a population is regulated by density-dependent processes. d. determine the factors that affect the size of a population.

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Textbook Question

A population's carrying capacity a. may change as environmental conditions change. b. can be accurately calculated using the logistic growth model. c. increases as the per capita population growth rate decreases. d. can never be exceeded.

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Textbook Question

Scientific study of the population cycles of the snowshoe hare and its predator, the lynx has revealed that a. predation is the dominant factor affecting prey population cycling. b. hares and lynx are so mutually dependent that each species cannot survive without the other. c. both hare and lynx population sizes are affected mainly by abiotic factors. d. the hare population is r-selected and the lynx population is K-selected.

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Textbook Question

Based on current growth rates, Earth's human population in 2019 will be closest to a. 2.5 million. b. 4.5 billion. c. 7.5 billion. d. 10.5 billion.

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Textbook Question

The observation that members of a population are uniformly distributed suggests that a. resources are distributed unevenly. b. the members of the population are competing for access to a resource. c.the members of the population are neither attracted to nor repelled by one another. d. the density of the population is low.

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Textbook Question

According to the logistic growth equation dNdt=rN(K−N)K a. the number of individuals added per unit time is greatest when N is close to zero. b. the per capita population growth rate increases as N approaches K. c. population growth is zero when N equals K. d. the population grows exponentially when K is small.

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