APES Unit 2: Island Biogeography

Based on the theory of island biogeography, which of the following is the most likely reason that an island in the ocean that is 5 kilometers from a continent would have a higher number of species than one that is 15 kilometers from a continent?

A) There are more species that have the ability to travel 5 kilometers than can travel 15 kilometers.

B) Islands that are closer to continents always have a wider range of habitats than more distant islands do.

C) There are smaller populations of each species on islands that are at greater distances from continents.

D) Islands that are closer to continents always have more ecological niches than more distant islands do.

A) There are more species that have the ability to travel 5 kilometers than can travel 15 kilometers.

A 163 square-kilometer (km2) small island is found 2000 km from the mainland. A second, larger, 230,000 km2 island is found 1000 km from the mainland. Based on the theory of island biogeography, which of the following statements is most likely true about the small island when compared with the large island?

A) The rate of immigration is lower for the small island than for the large island.

B) The small island has niches that are more like the mainland than the large island.

C) The small island has more available resources than the large island.

D) The rate of species extinction is lower on the small island than on the large island.

A) The rate of immigration is lower for the small island than for the large island.

Highly specialized species tend to evolve on islands because of the environmental conditions and resource availability.

Based on the theory of island biogeography, which of the following would most likely experience the greatest decline of specialist species if an invasive species emigrated from the mainland?

A) A small island a far distance from the mainland

B) A small island in close proximity to the mainland

C) A large island a far distance from the mainland

D) A large island in close proximity to the mainland

B) A small island in close proximity to the mainland

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