Chapter 53: Problem 2
Which of the following is usually the first step in the disruption of a natural habitat by humans? a. establishment of small villages b. planting of crops c. building of a road d. invasion by exotic species e. overexploitation of resources
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Habitat fragmentation has damaged populations of breeding birds in North America because: a. the remaining habitat patches rarely contain enough food for birds to rear their offspring. b. the nests of birds in small habitat patches are frequently attacked by predators. c. pairs of breeding birds cannot easily move from one habitat patch to another. d. female birds cannot locate potential mates in small habitat patches. e. small habitat patches do not have enough edges to provide adequate hiding places.
Metapopulations are defined as: a. neighboring populations that exchange individuals. b. populations that steadily decrease in size. c. populations that steadily increase in size. d. populations that produce numerous fertile offspring. e. populations that never receive immigrants.
Population viability analyses allow conservation biologists to: a. identify the source population from which an individual dispersed to a sink population. b. determine how large an area must be preserved for the protection of a threatened species. c. identify whether individuals of a threatened species are re productively mature. d. predict the minimum population size of a threatened species that is likely to survive. e. predict whether a threatened species will use habitat corridors.
The main goal of restoration ecology is the reestablishment of: a. natural patterns of water flow. b. the vitality of a degraded ecosystem. c. the historical corridors linking forest fragments. d. the natural barriers to animal movement. e. ecotourism.
Which of the following is most likely to be a biodiversity hotspot? a. a patch of forest in the middle of North America that is \(500 \mathrm{km}\) from the nearest big city b. a series of uninhabitable sand dunes in the Sahara Desert c. a botanical garden that houses representatives of 25,000 plant species d. a tropical island with many endemic species and a growing human population e. a suburban neighborhood where fields have been converted to backyards and playgrounds
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