Keystone & Indicator Species Quizizz

What is a keystone species?

• A species that helps to hold an ecosystem together

• A species that lives in or around rocks

• Keys and stones have nothing to do with ecology

• A keystone isn't a living thing, it's just a stone

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Why are bees considered a keystone species?

• The honey they make supports the bear population

• They pollinate flowers that produce fruit which supports the ecosystem

• They sting when threatened

• They live in hives

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An animal that naturally preys on others.

• Keystone Species

• Predators

• Umbrella Species

• Herbivores

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A life form that is very sensitive to environmental changes in its ecosystem. They can give us early-warning messages that a habitat is suffering.

• Indicator Species

• Flagship Species

• Predators

• Ecosystem Engineers

A sea otter and a sea star are examples of...

• invasive species
• keystone species
• native species 
• symbiotic species

Based on the graph shown, how can you tell sea otters are a keystone species?

• as the sea otter population decreases, biodiversity increases
• as sea otter population increases, biodiversity increases
• changes in the sea otter population have little effect on biodiversity 
• the sea otter population dereases due to the presence of urchins

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A species that maintain biodiversity by keeping prey populations controlled are called...

• Introduced Species
• Apex Predators
• Invasive Species
• Keystone Species

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What is a keystone species?

• A species that lives in a national park

• A species that has a large role in keeping the ecosystem balanced

• A species that is close to extinction

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Otters prey on sea urchins. Sea urchins eat kelp. Kelp is home to many animals. What would happen if there were no more otters?

• The sea urchin population would die out

• The kelp population would become larger

• The homes of many animals would be destroyed by sea urchins

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The mountain pika is one of few animals in it's ecosystem that doesn't hibernate. How does this make them more important to their ecosystem?

• They are one of the only food sources for predators in the winter months

• They use less resources than other animals

• They destroy waterways with their burrowing

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