BIO120H1 Lecture Notes - Lecture 10: Herbivore, Insecticide, Cyclopamine

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BIO120H1 Full Course Notes
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BIO120H1 Full Course Notes
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All biomass belong to these 4 tropic levels. Flow of energy (bio220) -> quantifying energy flops goes from 1 level to the next. Goldenrod outcompetes: single species dominates, all goldenrods. Indirect effect: effect carnivores have on plants; plants are benefitting from carnivores. Can drastically affect (simple) communities slide 6. Eat beetles good, eat spiders bad => removal experiment. Take out fish, more dragonflies (eat less larvae) Fish"s effect on plant: fish eat dragonfly, dragonfly eat pollinator, pollinator effect plant. Microbes live in the guts in animals of herbivores or else they won"t survive. Structures on plants and their biochemistry as herbivore deterrents. Co-evolutionary race: plants to make chemicals, animals to evade these chemicals, more. Life is hard for herbivores: plant tissues defended about herbivore effect; hard to digest chemicals, more elaborate (arms race) Specialization gets tighter: animals able to only detoxify a certain species of plants. Milkweed: white liquid (latex) pushed out under pressure.

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