lecture note

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10 Jan 2011
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L09- BIO 120
Trophic : where nutrition comes from.
Trophic levels:
Primary producers = plants
Primary consumers = herbivores
Secondary consumers = carnivores who eat herbivores
Tertiary consumers = carnivores who eat secondary consumers (carnivores)
Detritivores = eat dead organic matter
Addition Experiments- adding a species.
Trophic cascades paper(Smith & Slobodkin) the world is green because
carnivores keep down herbivores so herbivores dont limit plant growth.
Small scattered island some plants which are preyed upon by beetles.
Beetles are eaten by lizards and spiders.
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