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Download February 4, 2010 - Rochester Community Schools
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February 4, 2010 • WITHOUT LOOKING AT NOTES, put these in order from smallest to largest: community, organism, biosphere, ecosystem, population, biome • What is the difference between and ecosystem and a biome? 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 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. 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 – Cat Parasite • 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)
