Food Webs & Roles
Effects on Populations
100
Where does the energy found in almost all of Earth's organisms ultimately come from?
Sun
100
What term do scientists use to describe a species that fits naturally into an ecosystem's balance?
Native Species
200
This zombie appears to be missing large chunks of muscle and skin. What food web role is responsible for breaking down this dead material?
Decomposers
200
Which organism is most essential to an ecosystem? (Without it, other organisms would starve.)
Producers
300
Which law describes the rules of nature that allow energy to pass from one organism to the next?
Law of Conservation of Energy
300
What's one change that would happen to this ecosystem's populations if most of the snakes were to die from disease?
1. The owl's population would get smaller (without as much food to eat).
2. The frog's population would get bigger (without as many predators.)
400
What is terribly wrong with this food web?
Arrows are backwards.
400
Think about how the Burmese Python fits into Florida's Everglades ecosystem based on the news report below. How would scientists describe a species like it that disrupts an ecosystem's balance?
Invasive Species
500
Identify 5 Secondary Consumers
Human, Trout, Salamander, Bald Eagle, Frog
500
Based on the graph below, what likely caused the deer population to decline?
A growing wolf population (wolves eat deer for food).