BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 58, Problem 3A
To effectively address the biodiversity crisis, the protection of individual species
a. must be used in concert with a principle of ecosystem management and restoration.
b. is a sufficient management approach that merely needs to be expanded to more species.
c. has no role to play in addressing the biodiversity crisis.
d. usually conflicts with the principle of ecosystem management
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Which of the following is one of the biggest threats to biodiversity? A. Invasive species B. Land protection C. Ecological conservation D. Habitat restoration
Which of the following best describes a keystone species?
a. An organism, whose introduction causes or is likely to cause environmental harm
b. An organism, who if removed, the entire ecosystem changes.
c. Can signal a change in the biological condition of a particular ecosystem and diagnose the health of that ecosystem
d. Can indirectly protect several other species in the same habitat
When an invasive species alters the community structure it is introduced to, what can the consequence be? a. extinction of economically important species b. reduced predation on some native species c. increased predation on some native species d. all of the above
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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- Explain the notion of community-based conservation. Why have conservation advocates been turning to this approach? What challenges exist in implementing it?arrow_forwardWhich of the following statements about keystone species is false? a) Keystone species are the most common (abundant) species in their ecosystem. b) The reintroduction of wolves into Yellowstone Park increased biodiversity. c) Removal of a keystone species can drastically change an ecosystem. d) Keystone species have a much greater effect on the functioning of their ecosystems than other species.arrow_forwardWhat is the single greatest threat to biodiversity?(A) overharvesting of commercially important species(B) habitat alteration, fragmentation, and destruction(C) introduced species that compete with native species(D) novel pathogensarrow_forward
- Converting a prairie to a farm field is an example of _________. a. overharvesting b. habitat loss c. exotic species d. climate changearrow_forwardNOTE: The image you need to see in order to answer this question is attachedA developer owns the property encompassing the three habitats above. By law, one of the habitats must be left intact to satisfy the zoning laws. The developer works with an environmental engineer to choose which of the habitats should be saved. The environmental engineer suggests that Site C should be saved. Which of the following choices best justifies this decision?Responses A) Site C has greater species richness and species evenness than either Site A or Site B. This will promote the maximum sustainability for future generations of animals. B) Site C is tied with Site A for greatest species richness, but unlike Site A, it has representative species from all 3 of the sites within it. C) Site C not only contains the greatest number of species, it also has the greatest genetic diversity within each species. D) Site C has more unique species in it than either Site A or Site Barrow_forwardBriefly explain THREE (3) ecological limiting factors that might affect the ecosystem of Kuching Wetland National Park.arrow_forward
- Environmental scientists David Pimentel, Rodolfo Zuniga, and Doug Morrison of Cornell University reviewed scientific estimates for the economic and ecological costs imposed by introduced and invasive species in the United States. They found that, as of 2005, approximately 50,000 species had been introduced in the United States and that these accountedfor over $120 billion in economic costs each year. These costs include direct losses and damage, as well as costs required to control the species. (The researchers did not quantify monetary estimates for losses of biodiversity, ecosystem services, and aesthetics, which they said would drive total costs several times higher.) Calculate values missing from the table to determine the number of introduced species of each type of organism and the annual cost that each imposes on our economy. Of the 50,000 species introduced into the UnitedStates, half are plants. Describe two ways in whichnon-native plants might be brought to a new location.How…arrow_forwardWhat is a keystone species and why do these species play such an important role in their community structure? If a keystone species were to go extinct what would happen to their community? Once you have answered those questions give me an example of a keystone species.arrow_forwardWhy do moderate levels of disturbance result in an increase in community diversity?a) The resulting uniform habitat supports stability, which in turn supports diversity.b) Less-competitive species evolve strategies to compete with dominant species.c) Habitats are opened up for less competitive speciesd) Competively dominant species infrequently exclude less competitive species after a moderate disturbance.arrow_forward
- Which of the following could qualify as a bottom-up control on a grassland community? (A) limitation of plant biomass by rainfall amount, (B) effect of grazing intensity by bison on plant species diversity, (C) the effects of predation by wolves on herbivore density, (D) herbivory by moth larvae reducing abundances of certain plant species, (E) agricultural practices by humans eliminating all but one species of grass.arrow_forwardAt any point in time, a number of environmental objectives must be met with a limited amount of economic resources. This means that once an environmental problem is identified, they have to be prioritized. In general, this is done using scientific valuation of the relative risk to human health and the ecology of a given environmental hazard - a procedure known as: A. Biodiversity B. Public Goods C. Risk Assessment D. Profit maximizationarrow_forwardThe graph above is from a paper by Dave Tilman published in 1994. Which of the following statements is consistent with the graph? A) The results contradicts the intermediate disturbance hypothesis B) Increasing diversity increases community stability C) The results support the intermediate disturbance hypothesis.arrow_forward
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