Chapter 4-3 predation, herbivores and keystone species

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Chapter 4-3predation, herbivores and keystone
species

• By Noelle Yip
• Emily Kuo
• And Lillian Xue

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Vocab

• Predation- an interaction in which one animal
  (the predator) captures and feeds on another
  animal (the prey).

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Predation

• Biological interaction where predator feeds on
  prey.Eg Lions and gazelles, polar bears and
  seals, humans and cows, snakes and deer.

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• Herbivory- is an interaction in which one animal
  (the herbivore) feeds on producers (EG. Plants).

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Herbivory

• Interaction where animal (herbivore) feeds on
  producers (plants).
• Eg Aphids and plants, horses and plants, and
  rabbits and vegetables/plants.

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• Keystone species- changes in population of a
  single species, which can lead to dramatic
  changes in a structure of a community.

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Keystone Species

• Keystone species is a species that has an unequal
  effect on its environment relative to its
  biomass. Eg Grizzly bear, elephants, jaguar.

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sources

• textbook section 4-3
• http//en.wikipedia.org/wiki/Keystone_species