BIO 200 Lecture Notes - Lecture 28: Snowshoe Hare, Camouflage, Paramecium
29 Nov 2017
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Bio200 jessica poulin lecture 28: consumer/resource interactions. Not all consumption is by true predators. Parasites do not kill their prey (consume parts of still-living host species organisms) Herbivores eat plants and can be predatory or parasitic (grazers: parasites of grass, Detritivores are consumers that don"t control their prey abundance (eat already dead growwzers: parasites of wood) things do not harm) Predators can eliminate their prey species (didinium will eat the paramecium predators reduce number of prey) -> didinium dies out itself because nothing to eat. Paramecium with refuges -> paramecium will drop but not go extinct -> didinium will drop but not go extinct from lack of food. Prey elimination isn"t limited to the lab. Klamath weed covered a lot of space -> chrysolina beetle good predator to eliminate klamath weed -> eliminated. Predators can also limit prey ranges australia home to megapodes -> don"t lay on.
