Ecosystem Dynamics and Species Interactions

Ecosystem Dynamics and Species Interactions

Assessment

Interactive Video

Biology, Science, Geography

9th - 10th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial explains trophic cascades, which occur when species are removed from an ecosystem, causing a chain reaction affecting other organisms. It distinguishes between top-down and bottom-up effects, highlighting the role of keystone species in maintaining ecosystem stability. The Amazon food web is used to illustrate these concepts through scenarios of species removal, such as Jaguars and frogs, and the impact of deforestation. The tutorial concludes with a preview of future class topics on ecosystem changes.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a trophic cascade?

A method of planting trees to restore ecosystems

A process where the removal of one species affects others in the ecosystem

A type of ecosystem where all species are equally important

A way to measure the biodiversity of an ecosystem

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following best describes a top-down cascade effect?

The removal of secondary consumers has no effect on the ecosystem

The introduction of new species stabilizes the ecosystem

The removal of apex predators affects species below them

The removal of primary producers affects the entire ecosystem

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What role do keystone species play in an ecosystem?

They are the primary producers in an ecosystem

They are crucial for maintaining the ecosystem's structure

They have little impact on the ecosystem's stability

They are the most abundant species in an ecosystem

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to the crocodile population if Jaguars are removed from the Amazon food web?

The crocodile population remains stable

The crocodile population increases

The crocodile population becomes extinct

The crocodile population decreases

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does the removal of Jaguars affect secondary consumers like snakes?

They become primary consumers

Their population remains unchanged

Their population decreases

Their population increases

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the initial impact of a disease wiping out frogs in the Amazon?

Stability in the ecosystem

Increase in tree kangaroo and bandicoot populations

Decrease in tree kangaroo populations

Increase in plant populations

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What might happen to snake populations if frogs are removed from the ecosystem?

Snake populations increase

Snake populations decrease

Snake populations remain stable

Snakes become primary consumers

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