Ecosystem Interactions and Dynamics

Mr. Anderson's video explores biotic and abiotic factors, starting with definitions and examples like wolves in Yellowstone and atmospheric carbon dioxide. It delves into biofilms at the cellular level, predator-prey relationships with snowshoe hare and Canada lynx, and ecosystem dynamics, highlighting the impact of wolves in Yellowstone. The video emphasizes the interconnectedness of life and how changes in one area can affect entire ecosystems.

What does the term 'biotic' refer to?

• Physical factors

• Chemical factors

• Living factors

• Non-living factors

Which of the following is an example of an abiotic factor?

• Elk population

• Predator-prey relationship

• Temperature

• Wolves in Yellowstone

What are biofilms primarily composed of?

• Proteins

• Nucleic acids

• Lipids

• Polysaccharides

What is a key characteristic of planktonic bacteria?

• They float and move independently

• They are stationary

• They form biofilms

• They are resistant to antibiotics

Which relationship is a classic example of predator-prey interaction?

• Wolves and elk

• Snowshoe hare and Canada lynx

• Coyotes and red foxes

• Beavers and willow trees

What happens to the Canada lynx population when the snowshoe hare population increases?

• It fluctuates randomly

• It increases

• It remains the same

• It decreases

What was the impact on the elk population when wolves were removed from Yellowstone?

• It remained stable

• It fluctuated randomly

• It increased

• It decreased

How did the removal of wolves affect the beaver population in Yellowstone?

• Beaver population increased

• Beaver population decreased

• Beaver population remained stable

• Beaver population fluctuated randomly

What is a keystone species?

• A species that has a minor impact on its ecosystem

• A species that is the most abundant in its ecosystem

• A species that has a disproportionately large impact on its ecosystem

• A species that is at the bottom of the food chain

What is the overall message about the interconnectedness of ecosystems?

• Changes in one area have no effect on other areas

• Only biotic factors affect ecosystems

• Only abiotic factors affect ecosystems

• Changes in one area can affect the entire ecosystem