Campbell Biology Plus Mastering Biology with Pearson eText - Access Card Package (11th Edition)
11th Edition
ISBN: 9780134082318
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 56.2, Problem 3CC
WHAT IF? → In 2005, at least ten grizzly bears in the greater Yellowstone ecosystem were killed through contact with people. Most of these deaths resulted from three things: collisions with automobiles, hunters (of other animals) shooting when charged by a female grizzly bear with cubs nearby, and conservation managers killing bears that attacked livestock repeatedly. If you were a conservation manager, what steps might you take to minimize such encounters in Yellowstone?
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Disruption #6: Over-Exploitation
Overexploitation, when so many individuals are
removed that a population can no longer sustain itself, has
been a major contributor in the decline of land-based
species over the last 50 years, and the primary driver of
biodiversity loss in marine systems.
The decline or extinction of a single species can also
change the composition of other species within a habitat,
including a shift in species dominance or decrease in the
survival ability of the remaining species. Other problems
can occur when overexploitation leads to a drop in nearby
populations. For instance, when overfishing of one species
leads to a decline in by-catch or drives the market to
overexploit another, previously unexploited, species.
The most overexploited groups of species are marine
fish and invertebrates (which are fished for food), a variety
of trees, animals hunted for meat, and plants and animals
harvested for medicinal use and trading. Rarity can help
drive up the price for…
Disruption #6: Over-Exploitation
Overexploitation, when so many individuals are
removed that a population can no longer sustain itself, has
been a major contributor in the decline of land-based
species over the last 50 years, and the primary driver of
biodiversity loss in marine systems.
The decline or extinction of a single species can also
change the composition of other species within a habitat,
including a shift in species dominance or decrease in the
survival ability of the remaining species. Other problems
can occur when overexploitation leads to a drop in nearby
populations. For instance, when overfishing of one species
leads to a decline in by-catch or drives the market to
overexploit another, previously unexploited, species.
The most overexploited groups of species are marine
fish and invertebrates (which are fished for food), a variety
of trees, animals hunted for meat, and plants and animals
harvested for medicinal use and trading. Rarity can help
drive up the price for…
Chapter 56 Solutions
Campbell Biology Plus Mastering Biology with Pearson eText - Access Card Package (11th Edition)
Ch. 56.1 - Explain why it is too narrow to define the...Ch. 56.1 - Identify the four main threats to biodiversity and...Ch. 56.1 - WHAT IF? Imagine two populations of a fish...Ch. 56.2 - How does the reduced genetic diversity of small...Ch. 56.2 - If there were 100 greater prairie chickens in a...Ch. 56.2 - WHAT IF? In 2005, at least ten grizzly bears in...Ch. 56.3 - Prob. 1CCCh. 56.3 - Prob. 2CCCh. 56.3 - Prob. 3CCCh. 56.4 - How can the addition of excess mineral nutrients...
Ch. 56.4 - MAKE CONNECTIONS There are vast stores of organic...Ch. 56.4 - MAKE CONNECTIONS Mutagens are chemical and...Ch. 56.5 - What is meant by the term sustainable development?Ch. 56.5 - Prob. 2CCCh. 56.5 - WHAT IF? Suppose a new fishery is discovered, and...Ch. 56 - Give at least three examples of key ecosystem...Ch. 56 - Why is the minimum viable population size smaller...Ch. 56 - Prob. 56.3CRCh. 56 - Prob. 56.4CRCh. 56 - Prob. 56.5CRCh. 56 - One characteristic that distinguishes a population...Ch. 56 - The main cause of the increase in the amount of...Ch. 56 - Prob. 3TYUCh. 56 - Which of the following is a consequence of...Ch. 56 - Which of the following strategies would most...Ch. 56 - Of the following statements about protected areas...Ch. 56 - Prob. 7TYUCh. 56 - Prob. 8TYUCh. 56 - SCIENTIFIC INQUIRY (a) Estimate the average CO2....Ch. 56 - WRITE ABOUT A THEME: INTERACTIONS One factor...Ch. 56 - Prob. 11TYU
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Q1: What does the term invasive species mean? A An invasive species is an introduced organism that benefits the ecosystem. В An invasive species is a native species that causes harm to other organisms in its ecosystem. C An invasive species is a species that introduces new diseases to an ecosystem. D An invasive species is a nonnative species that causes harm to the ecosystem it is introduced into. E An invasive species is a species that can reproduce with multiple other species in an ecosystem.arrow_forwardPlease match allarrow_forwardCapturing and relocating is stressful for animals. In the zebra example, what are the stages of reintroduction, and what purpose does each step serve? Why is the buffalo considered a success story for reintroduction? (And -- based on what you know from lecture, what type of population growth pattern does this indicate?) Park managers use the term “adaptive management”; what do you think this means, and what are two benefits of this approach to managing ecosystems?arrow_forward
- What are the implications of the "bottleneck effect" for wildlife managers who try to help endangered species, such as the whooping crane, recover from near extinction?arrow_forwardFor a conservation biologist interested in sustaining populations of the organisms below, why would it be helpful to take a landscape ecology perspective? Explain your answer in each case. • A forest-breeding warbler that suffers poor nesting success in small, fragmented forest patches • A bighorn sheep that must move seasonally between mountains and lowlands • A toad that lives in upland areas but travels crosscountry to breed in localized pools each springarrow_forwardhelp.arrow_forward
- Renewable resource management is challenging. Populations of whitetail deer today live in areas with few natural predators. Their populations have expanded exponentially. Population control methods include hunting—even in urban areas.Do you think that controlled hunting should be used to manage deer populations in urban areas?arrow_forwardDescribe the multiple impacts of wolf reintroduction in Yellowstone that expanded beyond the basic food web of woody plants, elk, and wolves.arrow_forwardQ10. An ecologist wants to know if diversity in a forest system is likely to decrease when an invasive species is introduced. This invasive species is a fast-growing annual plant that grows on oak trees and kills them. The invasive species can only survive on living oak trees. The ecologist has the original model from this lab and another version of the model which includes transitions that involve the invasive species. To answer the research question, the ecologist should compare species diversity generated by the original model to diversity generated by which model described below? A model in which oak has a positive transition rate to the invasive and the invasive has a positive transition to grass. A model in which oak has a positive transition rate to the invasive and the invasive has a positive transition to oak. A model in which the invasive has a positive transition rate to oak and oak has a positive transition to grass.arrow_forward
- Question 3 Which of the following does not directly affect the intensity of competition? Question 3 options: A) Niche overlap. B) Niche breadth. C) The density of competitors. D) The presence of similar species. Question 4 When disturbance is frequent, competition is often less intense. Question 4 options: A) True B) Falsearrow_forwardCompetition between species on the same trophic tier leads to four potential outcomes, 3 are deterministic (zero sum games where one species goes extinct and the other maximizes their growth to balance at the carrying capacity) and one where both competitors survive, but neither does well. A) This dynamic suggests that extirpation (local extinction) of populations is a far more likely outcome than co-existence. How does this affect management policies aimed at increasing biodiversity and proliferation of inter and intra population and interspecies variation. B) Endangered species are defined by low growth rates (r) and low K (reflecting high demand for resources). What are the implications of both these factors on the outcome of competition scenarios, especially the most common scenario of alternate stable states?arrow_forwardOnly a few hundred grizzly bears remain in the contiguous United States, but populations are healthy in Canada and Alaska. Should we spend millions of dollars for grizzly recovery and management programs in Yellowstone National Park and adjacent wilderness areas?arrow_forward
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