1. Aim # 71: How do organisms interact in an ecosystem?
Date: May 1st, 2017
Aim # 71: How do organisms interact in an ecosystem?
HW:
Daily Review of class notes
RRB pages 1-4 due FRIDAY
Castle Learning (QUIZ) due MONDAY
Do Now:
What do we call an organism’s role in its community?
What is the role of PRODUCERS?
What is the role of HERBIVORES?
What is the role of CARNIVORES?
What is the role of bacteria and fungi? Why are the so important?
What is the role of scavengers?

2. Aim #71: How do organisms interact in an ecosystem?

3. Types of Relationships:
Cooperative
Competitive

4. Predator-Prey Relationship:

5. 1) Why do organisms need to eat?
To get ENERGY!!
Cell Respiration:
C6H12O6 + O ATP + CO2 + H2O

6. 2) Organism Categories:
Organisms
(Autotrophs)
Producers
(Heterotrophs)
Consumers
Decomposers

7. 3) Organism Categories:
Consumers
1’ Consumers
Herbivore
2’ Consumers
Omnivore
Carnivore/
3’ Consumers
Herbivores – eat only producers
Carnivores – eat only meat
Omnivores – eat both producers & meat

8. Ecosystem Relationships
Parasite & host – parasite benefits and host is affected ( + , - )
Mutualism (symbiosis) – both benefit ( +, + )
Commensalism – one benefits and other is unaffected ( + , 0)
Predator & prey – predator benefits and prey is affected ( + , -)

9. 4a) Parasites Tick Fluke Worms
Parasites are organisms that attack other live
organisms called hosts.
Parasite benefits and host is affected ( + , - )

10. 4b) Mutualism (symbiosis):
The Nile crocodile opening its mouth to permit the Egyptian plover to feed on any leeches attached to its gums.
Bee eats nectar &
at the same time
picks up pollen to
be spread to other
flowers.
both benefit ( +, + )

11. one benefits and other is unaffected ( + , 0)
4c) Commensalism:
Adult barnacles are sessile and they benefit by
attaching to a whale’s flipper by being transported
to food sources. The whale is unharmed.
one benefits and other is unaffected ( + , 0)

12. Aim # 71: How do organisms interact in an ecosystem?
Date: May 2nd, 2017
Aim # 71: How do organisms interact in an ecosystem?
HW:
Daily Review of class notes
RRB pages 1-4 due FRIDAY
Castle Learning (QUIZ) due MONDAY
Do Now:
What are primary consumers?
What are secondary consumers?
What is parasitism? Give an example.
What is mutualism (symbiosis)? Give an example.
What is commensalism? Give an example.
What is a predator-prey relationship? Give an example.

13. 5) How do the cows we eat get their energy?
Primary consumers get their energy from the producers they eat

14. 6) How do producers get their energy?
The primary source of energy for living things is the____.
____________capture this energy through a process of _________________
sun
Autotrophs
photosynthesis

15. 7) How is energy transferred in a community?
Energy is transferred by consuming other organisms

16. 8) In which direction is the energy moving? Why?

17. 9) Food Chains
Scientists depict this transfer of energy as a Food chain. They show the transfer of energy from one organism to another in a community

18. Show many food chains interconnected together
10) Food Webs
Show many food chains interconnected together

19. 11) Energy Pyramid 3’ Consumers 2’ Consumers Energy Flow 1’ Consumers
Producers

20. 12) Sun’s Energy in an Ecosystem
Some of the energy is used by each organism and some of it is lost as heat energy to the environment

21. 13) Why is there so little energy at the top of the pyramid?
Most of the energy from the sun has been used or lost by organism in the lower levels
Only about 10% of the energy available at each level is transferred to the NEXT level. 1%
10%
100%

22. Which organism has the least amount of energy flow?
The most amount of stored energy?

23. Label the pyramid below:
carnivores (tertiary consumers)
carnivores (secondary consumers)
herbivores (primary consumers)
producers (autotrophs)

24. Aim # 71: How do organisms interact in an ecosystem?
Date: May 3rd, 2017
Aim # 71: How do organisms interact in an ecosystem?
HW:
Daily Review of class notes
RRB pages 1-4 due FRIDAY
Castle Learning (QUIZ) due MONDAY
Do Now:
Please take out your notes packets!

25. 14) Ecological pyramids Pyramid of Numbers Shows the relative
Section 3-2
Pyramid of Numbers
Shows the relative
number of individual
organisms at each
trophic level.
Energy Pyramid
Shows the relative amount of
energy available at each trophic
level. Organisms use about 10
percent of this
energy for
life processes.
The rest is lost
as heat.
Biomass Pyramid
Represents the amount of living organic matter at each trophic level. Typically, the greatest biomass is at the base of the pyramid.
Go to Section:

26. Energy Pyramid
Shows the amount of energy available in an ecosystem at each feeding (TROPHIC) level
0.1 3 1 2 10 1
producers

27. Biomass pyramid
Shows the relative mass of organisms (biomass) at each feeding level

28. Pyramid of Numbers
Population size also tends to generally decrease as you move up through the tropic levels.

30. Questions:
What type of relationship is one organism harmed and the other benefits?
What type of relationship do both organisms benefit?
What type of relationship is one benefited and the other is neither harmed nor benefited?
What kinds of living things are producers? Why are they called autotrophs?
What makes an animal a primary consumer?
How does the amount of food energy change as you move up the pyramid?
Where do the producers get their food energy?
What would happen to the pyramid if green plants died out?