1. Bellringer- October 17, 2012 What do we call…
An organism that eats ONLY meat?
An organism that makes its own food?
An organism that eats ONLY producers?
An organism that breaks down waste?
An organism that eats both plants AND animals?

2. Bellringer- October 17, 2012 What do we call…
An organism that eats ONLY meat? Carnivore
An organism that makes its own food?
An organism that eats ONLY producers?
An organism that breaks down waste?
An organism that eats both plants AND animals?

3. Bellringer- October 17, 2012 What do we call…
An organism that eats ONLY meat? Carnivore
An organism that makes its own food? Producer
An organism that eats ONLY producers?
An organism that breaks down waste?
An organism that eats both plants AND animals?

4. Bellringer- October 17, 2012 What do we call…
An organism that eats ONLY meat? Carnivore
An organism that makes its own food? Producer
An organism that eats ONLY producers? Herbivores
An organism that breaks down waste?
An organism that eats both plants AND animals?

5. Bellringer- October 17, 2012 What do we call…
An organism that eats ONLY meat? Carnivore
An organism that makes its own food? Producer
An organism that eats ONLY producers? Herbivores
An organism that breaks down waste? Decomposers
An organism that eats both plants AND animals?

6. Bellringer- October 17, 2012 What do we call…
An organism that eats ONLY meat? Carnivore
An organism that makes its own food? Producer
An organism that eats ONLY producers? Herbivores
An organism that breaks down waste? Decomposers
An organism that eats both plants AND animals?
Omnivores

7. Location: Jackson, MS
Size: 8,700 students
Admission Requirements: 17 – 20 average ACT
Admitted: 62%

8. Setting: Urban campus
Mascot: Tigers / “Blue Bengals”
Sports: NCAA Division I-FCS
Famous for: Marching Band – the Sonic Boom

9. What the heck happens in a food chain if something changes??

10. By the end of today…
Achievers on the ROAD to college will use food chains to predict the resulting change from decreasing or increasing one species’ population.
Achievers on the ROAD to college will be able to answer our question of the day.

11. Question of the Day
How does a change in the population of one organism affect the population of another?

12. HYPOTHESIS TIME…
If one organism in the food chain increases OR decreases…how does that affect the other organisms in the food chain???

13. A QUICK REVIEW FOR YOUUUUUUUU.

14. 1. QQ: Does the arrow in a food web point to the eater or the one eaten?

15. 1. QQ: Does the arrow in a food web point to the eater or the one eaten?

16. 2. Quick Question: What is the source of all energy in an ecosystem?

17. Food Chain Example

18. REMEMBER: A carnivore is an animal that only eats meat.

19. REMEMBER: A herbivore only eats producers.

20. REMEMBER: An omnivore eats both plants and animals.

21. Interactions in a Food Chain
Every organism in a food chain depends on (1)each other.
If any part of the chain gets disrupted…it can throw off (2)every organism in that food chain…
Just like if we’re in a line and someone steps out of line…it throws the whole class off…

22. Interactions in a Food Chain
Producers are the original (3)energy source of any food chain.

23. Soooooo.
If ANYTHING happens that could change the amount of producers…. it affects the ENTIRE food chain.

24. Interactions in a Food Chain
QUICK CHECK: What is my producer in this food chain??

25. Interactions in a Food ChainX X
If grass is needed for the rabbit to survive, and grass was (4)removed, the rabbit’s population will…. decrease!

26. Interactions in a Food ChainX X
If the rabbits are needed for the fox to survive, and the rabbit population (5)decreases…the fox will also (6)decrease (because it has nothing to eat!!!)

27. Interactions in a Food ChainX X
EVEN IF… ALL THE PRODUCERS ARE FINE…
If something happens to the rabbit population, like a disease, and the amount of rabbits decreases…the fox population will (7)also go down.

28. Interactions in a Food Chain+ X
HOWEVER…if a predator is (8)removed..(something HIGHER on the food chain) the organisms LOWER than that predator will (9)INCREASE
If foxes died out, there would be nothing to hunt the rabbits…therefore rabbits would INCREASE

29. Interactions in a Food Chain
USE COMMON SENSE!
If you eat only one thing and that thing disappears then you won’t have anymore of it to eat and die.

30. ROAD check
What would happen to the slug if all the leaves were removed??

31. ROAD check
What would happen to the slug if all the leaves were removed??
Slug population would decrease

32. ROAD check
What would happen to the frog if all the leaves were removed??

33. ROAD check
What would happen to the frog if all the leaves were removed??
Frog population would decrease

34. ROAD check
What would happen to the frogs if the Heron were removed??

35. ROAD check What would happen to the frogs if the Heron were removed??
Frog populations would increase!

36. BUT. The same is true the OTHER WAY…
If weather conditions are REALLY good in a particular ecosystem…there can be an increase in the amount of producers.

37. If we have (10)MORE producers…there is (11)MORE for our consumers to eat.
If our consumers eat MORE…they can live longer AND have more offspring.

38. ROAD check
What happens to the frogs if there are more leaves?

39. ROAD check What happens to the frogs if there are more leaves?
Frog population would increase!

40. ROAD check
What happens to insects if plants die out??

41. ROAD check What happens to insects if plants die out??
Insect population would decrease.

42. ROAD check
What happens to the mouse if owls die out??

43. ROAD check What happens to the mouse if owls die out??
Mice population would increase.

44. ROAD check
What happens to the owl if insects die out?

45. ROAD check What happens to the owl if insects die out?
Owl populations would decrease.

46. What happens to the hawks if the dandelions decrease?
ROAD check
What happens to the hawks if the dandelions decrease?
Hawk
Sparrow
Snail
Dandelion

47. What happens to the hawks if the dandelions decrease?
ROAD check
What happens to the hawks if the dandelions decrease?
Hawk population would decrease.
Hawk
Sparrow
Snail
Dandelion

48. What happens to the sparrows if the snails increase??
ROAD check
What happens to the sparrows if the snails increase??
Hawk
Sparrow
Snail
Dandelion

49. What happens to the sparrows if the snails increase??
ROAD check
What happens to the sparrows if the snails increase??
Sparrow population would increase!
Hawk
Sparrow
Snail
Dandelion

50. What happens to the dandelions if the hawks decrease??
ROAD check
What happens to the dandelions if the hawks decrease??
Hawk
Sparrow
Snail
Dandelion

51. What happens to the dandelions if the hawks decrease??
ROAD check
What happens to the dandelions if the hawks decrease??
Dandelions would likely increase.
Hawk
Sparrow
Snail
Dandelion

52. What happens to the snails if the sparrow decreases??
ROAD check
What happens to the snails if the sparrow decreases??
Hawk
Sparrow
Snail
Dandelion

53. What happens to the snails if the sparrow decreases??
ROAD check
What happens to the snails if the sparrow decreases??
Snail populations would increase.
Hawk
Sparrow
Snail
Dandelion

54. Enrichment… Must have 4+ organisms
Create a Food Chain
Must have 4+ organisms
Add plants of various types. Label them producers
Add consumers showing links between producers.
Label all of the consumers (herbivores, carnivores, or omnivores)
On the back of your picture, answer these 4 questions…
What would happen to your producer if your final consumer increased?
What would happen to your first consumer if your producers increased?
What would happen to your secondary consumer if your first consumer decreased?
What would happen to your secondary consumer if your first consumer increased??