Exam 56: Conservation Biology and Global Change

-Based on what you know about ecosystem stability and the information provided in the graph,which community (A-E)would likely support the most biodiversity?

Overexploitation encourages extinction and is most likely to affect

Suppose you attend a town meeting at which some experts tell the audience that they have performed a cost-benefit analysis of a proposed transit system that would probably reduce overall air pollution and fossil fuel consumption.The analysis,however,reveals that ticket prices will not cover the cost of operating the system when fuel,wages,and equipment are taken into account.As a biologist,you know that if ecosystem services had been included in the analysis the experts might have arrived at a different answer.Why are ecosystem services rarely included in economic analyses?

One characteristic that distinguishes a population in an extinction vortex from most other populations is that

For the following questions,match the statement with the appropriate term/phrase. -This causes an increase in the intensity of UV radiation reaching Earth.

Which of the following is true about the current research regarding forest fragmentation?

Which of the following statements regarding extinction is (are)correct? I.Only a small percentage of species is immune from extinction. II.Extinction occurs whether humans interfere or not. III.Extinctions can even be caused indirectly by humans.

The long-term problem with red-cockaded woodpecker habitat intervention in the southwest United States is

Small populations are most vulnerable to ________ and ________.

What is a critical load?

Which of the following is a type of research in which a conservation biologist would be involved?

How is habitat fragmentation related to biodiversity loss?

Which of the following examples poses the greatest potential threat to biodiversity?

Your friend is wary of environmentalists' claims that global warming could lead to major biological change on Earth.Which of the following statements can you use in response to your friend's suspicions?

Researchers have been studying a rare population of eighty-seven voles in an isolated area.Ten voles from a larger population were added to this isolated population.Besides having ten additional animals,what benefits are there to importing individuals?

Of the following ecosystem types,which have been impacted the most by humans?

For the following questions,match the statement with the appropriate term/phrase. -This causes extremely high levels of toxic chemicals in fish-eating birds.

Extinction is a natural phenomenon.It is estimated that 99% of all species that ever lived are now extinct.Why then do we say that we are now experiencing an extinction (loss of biodiversity)crisis?

The following statements are correct,with the exception of:

According to the U.S.Endangered Species Act (ESA),the difference between an endangered species and a threatened one is that