Transcript SPECIES INTERACTIONS CONT

COMMUNITY ECOLOGY II
PP 403-404
PREDATION (+/-)
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one species eats another species
predator: eater and prey: eaten
Types: carnivores, herbivores
PREY: SEA URCHINS
PREDATOR: SEA
STARS
• cyclic in nature – ↑ in prey leads to ↑ in
predators (vice versa)
• Adaptations in prey for defense against
predators
RESPONSES TO PREDATION
• camouflage: Cryptic coloration disguises
an animal so it’s less visible to predators or
prey
• warning coloration: intended not to
camouflage an organism but to make it
more noticeable
- Bright coloring, scent, or taste to warn
potential aggressors
• mimicry: physical (or behavioral
resemblance) of one species to another
1. natural selection of a second moth
species
favors moths who look like the bad
tasting
species (bright colors)
• moment of truth defenses: action by prey
just before death that is unexpected by
predator
• alluring coloration: animals are colored so
a predator's attention is drawn to a nonvital part of the prey's body