Ecosystem Dynamics and Interactions

The video tutorial explores the Food Chain Gizmo, focusing on energy transfer and ecosystem dynamics. It includes activities to observe population changes, predator-prey relationships, and long-term ecosystem effects. Students make predictions and analyze how changes in one species affect others, aiming to understand equilibrium and disturbances in ecosystems.

What is the primary focus of the Food Chain Gizmo?

• Analyzing weather patterns

• Understanding energy transfer and ecosystem changes

• Exploring human impact on nature

• Studying plant growth

What does it mean when an ecosystem is in equilibrium?

• All species are extinct

• Predators outnumber prey

• Only one species dominates

• Populations are balanced and stable

In the predator-prey relationship activity, what can be altered in the Gizmo?

• Soil quality

• Population health and numbers

• Weather conditions

• Water availability

What is a hypothesis you might form about the hawk population?

• Hawks are unaffected by other species

• Hawks are the primary prey

• Hawks, as top predators, influence other populations

• Hawks only eat grass

What happens to the grass population when the rabbit population is doubled?

• Grass population decreases

• Grass population becomes extinct

• Grass population increases

• Grass population remains unchanged

How does halving the rabbit population affect the snake population?

• Snake population becomes extinct

• Snake population decreases

• Snake population remains unchanged

• Snake population increases

What is observed when most of the hawks are removed from the ecosystem?

• Rabbits decrease significantly

• Snakes decrease significantly

• Grass decreases significantly

• Rabbits increase significantly

What is a major disturbance that the ecosystem can recover from?

• Introduction of a new species

• Permanent change in climate

• Temporary removal of a predator

• Complete removal of all species

What is the significance of reaching a new equilibrium in an ecosystem?

• It means all species are extinct

• It indicates a permanent imbalance

• It shows a temporary disruption

• It reflects a new stable state

How does changing one level of the food chain affect the others?

• It has no effect

• It only affects the top predator

• It can cause a chain reaction affecting all levels

• It only affects the prey