BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 58, Problem 1S
If 99% of the species that ever existed are now extinct, why is there such concern over the extinction rates over the last several centuries?
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With an extinction rate of 100 E/MSY and an estimated 10 million species, how many extinctions are expected to occur in a century?
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Chapter 58 Solutions
BIOLOGY
Ch. 58.1 - Describe the history of extinction through time.Ch. 58.1 - Prob. 2LOCh. 58.2 - Prob. 1LOCh. 58.2 - Prob. 2LOCh. 58.3 - Prob. 1LOCh. 58.3 - Explain how these causes can interact to bring...Ch. 58.4 - Prob. 1LOCh. 58.4 - Describe the potential roles of natural selection...Ch. 58.4 - Prob. 3LOCh. 58.5 - Prob. 1LO
Ch. 58.5 - Prob. 2LOCh. 58.5 - Prob. 3LOCh. 58 - If we assume that population density is a good...Ch. 58 - Prob. 2DACh. 58 - Would the extinction rate increase if an area were...Ch. 58 - Prob. 4DACh. 58 - Why do population density and growth rates differ...Ch. 58 - Why might whale populations fail to recover once...Ch. 58 - Why do small populations lose genetic variation?Ch. 58 - Prob. 1UCh. 58 - The economic value of indirect ecosystem services...Ch. 58 - The amphibian decline is best described as a....Ch. 58 - Prob. 4UCh. 58 - When populations are drastically reduced in size,...Ch. 58 - A captive-breeding program followed by release to...Ch. 58 - Historically, island species have tended to become...Ch. 58 - Ninety-nine percent of all the species that ever...Ch. 58 - To effectively address the biodiversity crisis,...Ch. 58 - The introduction of a nonnative predator to an...Ch. 58 - If 99% of the species that ever existed are now...Ch. 58 - Prob. 2SCh. 58 - Prob. 3SCh. 58 - Prob. 4SCh. 58 - Prob. 5S
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- What does it mean if the growth rate is 0.090, probability of extinction is 0.00, mean population is 240, and genetic diversity is 92?arrow_forwardWhy might the increasing human population result inan increase in the extinction rate of other species?arrow_forwardThe number of extinctions of birds and mammals has gone up as human populations have increased. True or False ?arrow_forward
- Why do you suppose there are so many endemic species—that is, species found nowhere else—on islands? Why have the overwhelming majority of recent extinctions occurred on islands?arrow_forwardHow should the probability of extinction due to stochastic processes vary with population size in the California Spotted Owl?arrow_forwardNatural processes of species formation and extinction emerge on a timescale measured in millions of years, whereas human-mediated extinctions are measured on a scale of years to decades. How does this discrepancy complicate our attempts to conserve biodiversity?arrow_forward
- If extinction is a natural part of life on Earth, why should we care about protectingendangered species Explainarrow_forwardHow did the removal of sea otters affect the population of two other organisms? Please explain. (Grey means they are no longer available in the ecosystem)arrow_forwardWhat is a possible explanation for the decline in fish population after 2004 based solely on the data given?arrow_forward
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