1. February 7, 2011
WITHOUT LOOKING AT NOTES, put these in order from smallest to largest:
community, organism, biosphere,
ecosystem, population, biome
What is the difference between an ecosystem and a biome?

2. Competition: more than one organism uses one resource at the same time
Q: Let’s turn our focus to communities. What are some interactions within communities?
Competition: more than one organism uses one resource at the same time
Food
Reproduction (competition within population)
Shelter
Water

4. Predation: one organism eats another. Praying Mantis Komodo Dragon
Q: Let’s turn our focus to communities. What are some interactions within communities?
Predation: one organism eats another.
Praying Mantis
Komodo Dragon

5. Q: Let’s turn our focus to communities
Q: Let’s turn our focus to communities. What are some interactions within communities?
Symbiotic relationships: close relationship between two or more species
EXAMPLES OF TYPE 1:
Aphids & Ants
Water Buffalo & Birds
Mutualism: both species benefit from relationship

6. Symbiosis- Mutualism
Ex. Lichen (fungi gives habitat to algae & algae gives food to fungi)

7. Symbiosis- Mutualism
Ex. Pea Plants (nodules on roots have bacteria to make nitrates, plants use nitrates to grow and bacteria get nutrients/shelter)

8. Symbiosis- Commensalism
EXAMPLE OF TYPE 2:
Crocodile & Fish
Commensalism: one organism benefits, one doesn’t care either way

9. Symbiosis- Commensalism
Ex. Barnacles (grow on marine organisms, barnacles get shelter, organism doesn’t care)

10. Symbiosis- Commensalism
Ex. Shark and Pilot Fish (fish get protection, shark doesn’t care)

11. Symbiosis- Parasitism
EXAMPLE OF TYPE 3:
Wasps & Aphids
Caterpillar & Wasp
Parasitism: one organism benefits, one is harmed

12. Symbiosis- Parasitism
Ex. Mistletoe (grows on trees and steals water from trees)

13. Symbiosis- Parasitism
Ex. Strangler Fig (grows on trees, strangles it so it cannot survive)

14. Homework
Part 4 of Pkt