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?

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

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

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

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

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

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

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

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

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

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

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

Homework Part 4 of Pkt