Bozeman Science- Biotic and Abiotic Factors in Ecosystems

What does 'biotic' refer to?

• Physical structures in habitats

• Non-living elements in an ecosystem

• Living organisms within an ecosystem

• Chemical factors affecting ecosystems

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What is an example of an abiotic factor?

• Biofilms formation

• Predator-prey relationships

• Atmospheric carbon dioxide levels

• Wolves in Yellowstone

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What role do abiotic factors play in ecosystems?

• They are solely responsible for the creation of biofilms

• They have no significant role

• They only affect non-living elements

• They influence living organisms and their interactions

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What are biofilms?

• A type of biotic factor affecting ecosystems

• Communities of bacteria forming protective layers

• Predatory animals in ecosystems

• Plants in aquatic environments

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How do abiotic factors influence biofilms?

• By providing nutrients

• Through temperature regulation

• Offering surfaces for attachment and flow of liquid

• Increasing sunlight exposure

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What are planktonic bacteria?

• Bacteria that feed on plants

• Free-floating bacteria

• Bacteria that live on land

• Bacteria that form biofilms

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Why are biofilms difficult to treat with antibiotics?

• Biofilms are not affected by chemical substances

• Antibiotics enhance biofilm growth

• Biofilms are resistant to physical removal

• Antibiotics cannot penetrate the protective layer of biofilms

What is the relationship between the snowshoe hare and the Canada lynx?

• Parasitism

• Predation

• Commensalism

• Mutualism

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How do predator and prey populations affect each other?

• Predator populations control prey populations

• Prey populations have no impact on predator populations

• Predator populations increase with decreasing prey populations

• Prey populations increase as predator populations decrease

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What was a significant ecological change in Yellowstone due to the reintroduction of wolves?

• Decrease in elk populations

• Increase in elk populations

• Increase in atmospheric carbon dioxide

• Decrease in beaver populations

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