2. 4/29/2014
Draw a food chain that includes the sun, a producer, 2 consumers, and a decomposer.

3. Today’s Goal:
I can describe the relationships in an ecosystem.

4. Today’s Plan:
Energy Pyramid
Symbiotic Relationships
Science Poems 

5. Food Webs…
Decomposer
Consumer
Producer

6. Producer Secondary Consumer Primary Consumer Tertiary Consumer
Decomposer
Tertiary Consumer
Secondary Consumer
Primary Consumer
Producer

7. Wolf
Sheep
Grass

8. Whale
Krill
Algae

9. Barn Owl
Field Mouse
Wheat

10. Human
Duck
Small Fish
Algae

11. Which category of organisms will receive least energy from their food?
2,000 mL energy
200 mL energy
20 mL energy
2 mL energy
0.2 mL energy
Which category of organisms will receive least energy from their food?
What happens to the 1,800 mL of energy the wheat DOES NOT absorb?
Why can’t a food chain have an unlimited number of links?

12. Other Ecological Relationships

13. Definition: One Species feeds on another
Predator-Prey
Definition: One Species feeds on another

14. Predator – An animal that lives by capturing and eating other animals.
Prey – An animal hunted or caught for food.

15. Rodent populations increase when owl numbers drop

16. Definition: two species need the same resource
Competition
Definition: two species need the same resource

17. Introduced Kudzu vines killed trees

18. Bandicoots and Rabbits
Bandicoots are nearly extinct because rabbits have eaten their food sources after being introduced to Australia

19. Wolves and Coyotes
When wolves have been reintroduced to an area coyote numbers drop and kit fox numbers may increase because of overlapping prey

20. Symbiosis – a close ecological relationship between species
There are 3 different types of symbiosis
Mutualism
Commensalism
Parasitism

21. Definition: association in which both species benefit
Mutualism
Definition: association in which both species benefit

22. Clownfish and Anemones
The Clown Fish are protected from predator fish by the stinging tentacles of the anemone. The anemone receives protection from polyp-eating fish.

23. Oxpecker on Impala

24. Lichens contain an algae and a fungus which cannot live separately

25. Ants, Caterpillars and Acacia Trees

26. Water Buffalo and Cattle Egrets

27. Definition: one species benefits, the other is unaffected
Commensalism
Definition: one species benefits, the other is unaffected

28. Bromeliads and Orchids growing on tree branch

29. Tree frogs in trees

30. Parasitism
Definition: one species benefits, the other is harmed

31. Host – The animal or plant on which another organism lives
Parasite – An organism that feeds on a different organism while contributing nothing to the survival of its host.
Difference between predator-prey: the parasite wants the host to stay ALIVE

32. Strangler Fig uses another tree for support, then smothers it

33. Wasp eggs on caterpillar

34. Practice
Match each of the following with the type of ecological relationship that they represent

35. 1. A water lily flower gets pollinated by bees and the bees eat nectar from the flower

36. 2. A dove uses a branch to build its nest without damaging the tree.

37. 3. Lizard captures and eats an insect

38. 4. Native pronghorns and introduced oryx both eat the same vegetation in New Mexico

39. 5. Heartworms survive by living in a dog’s heart

40. 6. Mosquito getting proteins from human blood

41. 7. African Fish Eagle catching a fish

42. 8. Cleaner Wrasse and Moray Eel

43. 9 & 10. Lions and Hyenas
Lions chase or kill hyenas because they hunt the same prey animals