Unit 2 Biodiversity

An island off the coast of Africa contains a larger percentage of specialist species than generalist species. Which of the following describes the most immediate effect if an invasive generalist species is introduced to the island?

• As predation increases, the population size of the invasive generalist species will decrease.

• As competition for resources increases, the population size of the island’s specialist species will decrease.

• As resources are partitioned, the population sizes of both the generalist species and the specialist species will increase.

• As niches overlap, the invasive generalist species will be outcompeted by the island’s specialist species.

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Biodiversity is measured using two criteria. They are...

• Species evenness and habitat area

• Species richness and ecological relationships

• Species richness and evenness

• Species evenness and NPP produced

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Which of the following would have the highest species richness?

• An ecosystem with 30 species with varying numbers of each population.

• An ecosystem with 15 species with 2 populations dominating in size.

• An ecosystem with 25 species with roughly the same amount of individuals in each population.

• An ecosystem with 5 highly specialized species with equal amount of individuals in each population.

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According to the map, which of the following islands would be negatively impacted the most by an invasive species?

• 1

• 2

• 3

• 4

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The first species that reappear after a major disruption to an ecosystem are known as...

• Primary consumers

• Reintroduced species

• Endangered Species

• Pioneer species

Primary succession would occur in all the following areas except..

• bare rock

• after a volcanic eruption

• sandy dunes

• an open field

What area would be considered the climax community?

• Annual herb stage

• forest

• scrub stage

• lichen moss stage

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Which of the following pairs would be considered a regulating service of biodiversity?

• Food and fresh water

• Pollination and biological control

• Tourism and the arts

• Habitats and genetic diversity

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Which of the following would be an anthropogenic effect on the cultural services of biodiversity?

• Switching to a vegan diet

• The dumping of toxic chemicals in our fresh water ways

• Increased snorkeling in the Great Barrier Reef

• Removal of a forest to build new town homes

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Invasive species are successful because

• they enter an ecosystem much like the one they come from.

• they are the first organisms to appear after a disturbance

• they have no predators and reduced competition

• they require less energy and can fit in lower trophic levels.

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