EBK BIOLOGY
5th Edition
ISBN: 9780100667976
Author: Maier
Publisher: YUZU
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Textbook Question
Chapter 14, Problem 9LTB
The current
- demographic momentum;
- the tendency for women to want to control family size;
- an artificially low number of density-independent factors;
- our use of fossil fuels;
- recent population crashes
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Describe the historical pattern of growth of the worldwide human population since our origin. Include in this historic overview the changes that have happened technologically, medically, culturally and nutritionally to result in major population changes over time. Relate the growth of the human population to our ecological footprint and explain the idea of limits to population growth known as the carrying capacity. Relative to carrying capacity, what may result from unbridled continued growth of our population? How does the size of the human population contribute to environmental degradation? Why must we take the human population size into account when we attempt to develop environmental restoration projects?
- minimum word count 1,500
Some Terms Related to Growth Patterns
Biotic potential
Exponential growth
Logistic growth
Carrying capacity
A growth pattern that forms an S-shaped curve. Answer
Theoretical highest possible reproductive capacity of a population given little to no environmental resistance. Answer
A growth pattern that forms a J-shaped curve. Answer
The theoretical population size that a given region can sustain over a prolonged time period. Answer
Chapter 14 Solutions
EBK BIOLOGY
Ch. 14 - Prob. 1LTBCh. 14 - Prob. 2LTBCh. 14 - Prob. 3LTBCh. 14 - Prob. 4LTBCh. 14 - According to the graph shown here, the carrying...Ch. 14 - All of the following are density-dependent factors...Ch. 14 - In contrast to nonhuman populations, human...Ch. 14 - Populations that rely on stored resources are...Ch. 14 - The current carrying capacity of Earth for the...Ch. 14 - Prob. 10LTB
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- Population Growth (continued) The graph below shows the population of Peregrine falcons in the United States (excluding Alaska and Hawaii). Look at the graph, then answer the questions below. 1,800 American peregrine falcon 1,600 Lower 48 States 1,400 1,200 1,000 800 600 400 200 1970 1972 1976 1978 1980 1982 1984 What type of growth is exhibited by this population? 1986 1988 1992 1994 Center for Biological Diversity cyclical expotential logistic susainable Breeding Pairs 1974 1990 1996 1998arrow_forwardMatch each term with its most suitable description. _____ carrying capacity a. maximum rate or increase per individual under ideal conditions _____ exponential growth b. population growth plots out as an S-shaped curve _____ biotic potential c. maximum number or individuals sustainable by the resources in a given environment _____ limiting factor d. population growth plots out as a J-shaped curve _____ logistic growth e. essential resource that restricts population growth when scarcearrow_forwardIn 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 momentumarrow_forward
- A population is expected to grow exponentially when the population size is close but below the carrying capacity of the environment. when the population size is exceeding the carrying capacity of the environment. when the birth rate changes as a function of the population after a severe population bottleneck.arrow_forwardWhich of the following is NOT true regarding population density? As population densities increase, density dependent factors increase in influence on the population. The crude density, or number of organisms per unit area, is a good indicator of where those organisms will be found in the landscape. Population densities can be useful to wildlife managers trying to maintain game populations as a renewable resource. Population densities can fluctuate overtime given their interactions among trophic levels.arrow_forwardThe pattern of recovery in a community after a disturbance is called ___________________. biogeochemical cycling a trophic cascade ecological succession the trophic structurearrow_forward
- Initial Population size: 567 per capita death rate over 3 years: 0.3 " " birth " " " " 0.2 after 3 years; the population has an exponentially per-capita growth rate of 0.87 over 10 years. what is the final population sizearrow_forwardDensity-dependent factors __________. have a greater impact at higher population densities are less important for regulating population size than density-independent factors act at the community level cause decreases in numbers of species in an ecosystem as a result of temperature extremesarrow_forwardDemographic momentum is the population principle that states that; Populations cannot exceed their carrying capacity Youthful populations grow much faster than populations with many older people The resources of the earth are finite and so no population can grow forever We can increase production to account for the growing human populationarrow_forward
- Read and highlight ways limiting factors affect the population growth Examples of how limiting factors affect population growth Abiotic (nonliving) limiting factors include things like wildfire, hurricanes, pollutants, droughts, floods and seasonal climate extremes. These factors limit all populations in a given area regardless of the size of the population. For example, a wildfire that sweeps through a dense forest in the Everglades has a big impact on every population in the ecosystem, regardless of how big the population is. Limiting factors can also be biotic-having to do with living organisms. Competition and predation are examples of biotic living factors. Organisms compete for available resources like food, water, and shelter. If the resources are plentiful then the populations can increase because there is less competition. If the resources are decreased in an area, competition increases and population size decreases. For example Mountain chickadees (Parus gambeli) compete for…arrow_forwardA colony of aliens reaches planet Earth in 3000 BC and set up a base in Antarctica. If their initial population is 100 and their specific growth rate is 0.02263/year and their yieid coefficient is 0.85, then in what year (AD) will they start to outcompete humans for resources negiecting resource and logistic growth limiting effects? Assume the human population 3000 BC is 50 million, the human yield coefficient is 0.75 and the human specific growth rate is 0.02/year. Answer:arrow_forwardWhich of the following statements about logistic growth is not correct? A population growing logistically has reached the carrying capacity of the environment in which it lives. A logistically growing population is represented by an S-shaped curve. When a population is growing logistically, it is limited by factors such as food supply and water. In a logistically growing population, the birth rate is much greater than the death rate.arrow_forward
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