Island Biogeography Concepts and Species

The video discusses island biogeography, focusing on factors affecting species diversity on islands. It explains the theory of island biogeography, highlighting three main ideas: larger islands support more species, islands closer to the mainland have higher species diversity, and island size affects ecological relationships. The video also covers the specialization of island species and their vulnerability to changes and invasive species.

What is the primary focus of island biogeography?

• The geological formation of islands

• The study of ocean currents

• The distribution and interaction of species on islands

• The climate patterns of islands

What is a figurative habitat island?

• A mountain peak

• A desert oasis

• A national park surrounded by urban areas

• An island in the ocean

Why do larger islands tend to have more species?

• They are closer to the mainland

• They have more predators

• They have a higher elevation

• They offer more resources and habitats

How does the distance from the mainland affect an island's species diversity?

• Closer islands have more species due to higher immigration rates

• Farther islands have more species

• Distance has no effect on species diversity

• Closer islands have fewer species

What happens to genetic diversity when an island is closer to the mainland?

• It decreases due to isolation

• It remains unchanged

• It decreases due to competition

• It increases due to more migration

What is a consequence of smaller islands having fewer producers and primary consumers?

• Higher rates of species colonization

• Difficulty in supporting secondary and tertiary consumers

• Increased energy transfer efficiency

• More diverse predator populations

What is the equilibrium point in island biogeography?

• The point where colonization and extinction rates are equal

• The point where the island reaches maximum size

• The point where all species are extinct

• The point where the island is closest to the mainland

Why are many island species considered specialists?

• Due to abundant resources

• To reduce competition for limited resources

• Because of high predator presence

• Due to frequent migration

What makes island species vulnerable to extinction?

• Abundance of predators

• Proximity to the mainland

• Introduction of invasive generalist species

• Excessive genetic diversity

How do Galapagos finches demonstrate specialization?

• By having diverse beak shapes for different food types

• By migrating frequently

• By being generalists

• By living in large flocks