Lecture 9 Communities B

Lecture 9 Communities B - B Predation Predators animals...

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2/13/09 1 B. Predation Predators - animals that eat prey (usually animals) Predation shapes many attributes - predators & prey – claws, fangs, stingers, and poison of predators – crypsis, mimicry, shells, speed, acute senses of prey (+/-) Prey avoid predation 1. Cryptic coloration, or camouflage – Makes prey difficult to spot Figure 53.5 2. Aposematic coloration Warns predators of prey defense Aposematic coloration
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2/13/09 2 3. Batesian mimicry – A harmless species mimics an or harmful/well- defended model (a) Hawkmoth larva (b) Green parrot snake Batesian mimicry 4. Müllerian mimicry – Two or more harmful/well-defended species resemble each other (a) Cuckoo bee (b) Yellow jacket C. Herbivory (+/-) Herbivory (+/-) The process in which an animal eats parts of a plant Result - mechanical and chemical defenses by plants anti-defense adaptations by herbivores
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2/13/09 3 Plant defenses - mechanical Rose stem Ocotillo spines Trichomes - sticky hairs Plant defenses - chemical nicotine caffeine cannabinoids in marijuana Herbivores have counter adaptations to plant defense
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This note was uploaded on 04/29/2009 for the course BILD BILD 2 taught by Professor Schroeder during the Spring '08 term at UCSD.

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Lecture 9 Communities B - B Predation Predators animals...

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