8.12C Biodiversity

Complete this statement. The more diverse an ecosystem is...

• the more stable it is.

• the more threatened its populations are.

• the few varieties of species are present.

• the more similar the species will be

Answer explanation

The more diverse an ecosystem is, the more stable it is. This is because diverse ecosystems have a variety of species that can adapt to changes and support each other.

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High biodiversity is ...

• having a lot of the same organism.

• having a few of the same organism.

• only having one of each organism.

• having a lot of variety of different organisms.

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Why is biodiversity in an ecosystem so important?

• Because it can help humans where to determine good places to develop farm land.

• Because places that have a healthy biodiversity are unaffected by major disturbances.

• Because having a high biodiversity allows for fewer opportunities of competition for similar resources.

• Because having a high biodiversity allows ecosystems to withstand disturbances (major changes).

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In a grassland ecosystem, lions prey on wildebeest. The population of lions has declined steadily because of illegal hunting. What will most likely happen to the population of wildebeest?

• The wildebeest population will increase
• The wildebeest population will decrease
• The wildebeest population will remian the same

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This picture shows a food web in a swamp ecosystem.  Which of the following statements explains the effect of biodiversity on the ecosystem if the mosquito population were to disappear from this ecosystem?

• Grass carp could still survive on bladderwort and the southern leopard frog could survive on butterflies.

• The butterfly orchids would overgrow and choke out the other organisms in the ecosystem.

• The southern leopard frog and grass carp would begin to consume the butterfly orchids to survive.

• The southern leopard frog, the raccoon, and thus the alligator would disappear from the ecosystem.

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Sudden floods hit ecosystems 1 and 2.  One ecosystem survives the natural disaster, while the other is wiped out. Use the data to explain which ecosystem can sustain life following a flood.

• Ecosystem 1 survives because it is small and less affected by natural disasters.

• Ecosystem 1 survives because it doesn't receive as much precipitation, so the flood will be a welcome water source.

• Ecosystem 2 survives because it has a lot of biodiversity, which allows it to better withstand natural disasters.

• Ecosystem 2 survives because it is used to receiving a lot of water since it has high annual precipitation.

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The food webs below model relationships among the organisms in two ecosystems. Which ecosystem would be more likely to survive if a disease killed the grasses?

• The forest ecosystem, because most of the animals can eat other organisms

• The grassland ecosystem, because several predators compete for food

• The forest ecosystem, because it has three top predators

• The grassland ecosystem, because it has many herbivores

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Higher Biodiversity will lead to?

• More Sustainability

• Less Sustainability

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This ecosystem has?

• Low biodiversity, making the ecosystem less sustainable

• No biodiversity, because there are not any land species

• Is less sustainable than a desert ecosystem

• High biodiversity, making the ecosystem more sustainable

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Which food web has the greater biodiversity?

• Food Web X

• Food Web Y

• They have equal biodiversity

• There is not enough information to determine biodiversity

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