1. Ecology Test Review

2. This is a graph of... A
Population
Size B C
Time
Carrying capacity

3. Autotrophs are the only food these organisms eat
Primary Consumers

4. These organisms have the ability to change light energy into chemical energy
Producers

5. These organisms digest dead plant and animal tissue
Decomposers

6. These organisms are also called carnivores
Secondary consumers

7. Herbivores?
Shrimp, snail, vole, mouse, rat, sparrow, mallard, smelt

8. In an ecosystem, these organisms are most likely to be the first to increase in population size.
Producers

9. Carrying capacity is reached
What happens at A? A
Population
Size B C
Time
Carrying capacity is reached

10. Maximum growth rate, abundant resources
What happens at B? A B
Population
Size C
Time
Maximum growth rate, abundant resources

11. Low growth rate due to low resources
What happens at C? A
Population
Size B C
Time
Low growth rate due to low resources

12. What is the annual population growth rate
What is the annual population growth rate? Year one fish Year two 30 fish Year three 10 fish
-5 fish per year

13. How much energy is lost during each step of the food chain?
90%

14. What is a climax community?
Mature community in succession has most biodiversity

15. These organisms are also called herbivores
Primary consumers

16. Define parasitism and give an example
Ecological relationship in which one organism benefits and one is harmed
Example: Mosquito and human

17. What two factors contribute to an increasing population growth rate?
Immigration and birth rate

18. How are matter and energy cycled in an ecosystem?
Matter is recycled and energy is lost

19. Rabbits eat grass, foxes eat rabbits, wolves eat foxes
Rabbits eat grass, foxes eat rabbits, wolves eat foxes. That is an example of …..
Food chain

20. The only heterotrophs required in an ecosystem are ...
Herbivores

21. Define commensalism and give an example.
An ecological relationship that benefits one organism but the other organism is not harmed or helped. A cowbird and cattle. The cowbird gets insects as they are disturbed by cattle.

22. Producer?
Aquatic,
Terrestrial plants

23. What do decomposers do? Be specific.
Break down organic matter into usable molecules for producers

24. Give an example of a producer and consumer relationship
Grasshopper eating grass

25. The end result of ecological succession is usually a
Climax community

26. Define mutualism and give an example
An ecological relationship that benefits both organisms. A bee pollinating a flower. The bee gets nectar the flower gets pollinated.

27. All organisms that inhabit a particular area.
Define community
All organisms that inhabit a particular area.

28. If all the carnivores in an area die what is the MOST likely result?
The herbivores increase and the producers decrease.

29. Define population
A group of interbreeding organisms of the same species that live in the same area.

30. 4th order consumer?
Hawk, Owl

31. Food chain

32. ?
10,000 cal
10 cal

33. How do primary and secondary succession differ?
Primary succession occurs on areas without soil, secondary occurs after something disturbs an existing habitat.

34. Give an example of a density dependent limiting factor
Competition, predation, disease

35. A species role in its habitat
What is a niche
A species role in its habitat