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Community Ecology Definitions to Know • Population – • Community - Community Interaction • Predator/Prey (+/-) * Includes herbivores/plants * Co-evolution: Organisms exert selection pressure on each other * Advantages to predation? * Adaptations of predators * Defenses of prey * Plants * Animals Adaptations of Predators Adaptations of Raptors (birds of prey) • • • • Talons Beaks Speed Keen eyesight • Good night vision (owls) • “3D” hearing • Soundless flight Defenses of Prey * Plants * thorns, chemical Defenses of Prey Animal * Warning coloration * Mimicry * Camouflage * mechanical: quills, thorns Defenses of Prey- Warning Coloration Defenses of Prey-Mimicry Defenses of Prey- Camouflage Defenses of Prey- Camouflage Defenses of Prey- Camouflage Defenses of Prey- Camouflage Camouflage: Also adaptation of predator Camouflage: Also adaptation of predator Symbiosis (Two species living in close proximity) • Parasitism (+/-) * How different from predator/prey? * Examples: • Comensalism (+/0) * Rare in nature * Example: Robin and Maple tree • Mutualism (+/+) * Examples: *