2.3-2.4 Island Biogeography and Ecological Tolerance

Specialist species evolve from generalist species because of limited resources, forcing them to feed on a small range of food items.

What best explains why each of the finch species on the Galápagos Islands evolved to be specialists?

Since the island is closer to the mainland, it is easier for species to migrate.

Based on the theory of island biogeography, what 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?

Small isolated islands have a lower availability of resources.

For what reasons do small isolated islands have a greater rate of species extinction than larger, less isolated islands?

They are more vulnerable to natural disasters and unpredictable events

Small populations of animals, such as those typically found on islands, are prone to extinction because why?

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

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

A small island in close proximity to the mainland

Based on the theory of island biogeography, what type of island (size and proximity to mainland) would most likely experience the greatest decline of specialist species if an invasive species emigrated from the mainland?

The biodiversity of the pond has decreased

A one-hectare pond is sampled in early September. The sample yields 1 small catfish as well as 17 benthic invertebrates that represent 10 species. If the pond is resampled a year later, what would best indicate that the pond had been adversely affected by adjacent development?

An estuary within a lagoon

Organisms adapted to surviving in water with the widest range of salinity would most likely be native species in which marine environments?

The Island Equilibrium Model

What does this show?

pH 4.5 - 6

What is the range of tolerance for frog embryos?