Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
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…
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.
Chapter 56 Solutions
Campbell Biology
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 - Prob. 2CCCh. 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 - Prob. 2TYUCh. 56 - Prob. 3TYUCh. 56 - Which of the following is a consequence of...Ch. 56 - Which of the following strategies would most...Ch. 56 - Prob. 6TYUCh. 56 - Prob. 7TYUCh. 56 - Prob. 8TYUCh. 56 - WRITE ABOUT A THEME: INTERACTIONS One factor...Ch. 56 - Prob. 10TYU
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