Species Interactions   5 major types of symbioses-Close interactions among species.
•   Predator captures, kills, and consumes prey.•   Determines relationships in food web.•   Regulates population size.•  ...
Mimicry
Herbivores are predators, plants prey!• Plants have defenses as well. Secondary  compounds = toxic but can be medicinal.• ...
Parasitism• Parasite benefits, host is harmed.• Ecto – outside                  Endo- inside
Mutualism• Both species benefit.
Commensalism• One species benefits, the other is “neutral”
Competition• Results from niche overlap- use of same  limited resource by 2 or more SPECIES.• Competitive Exclusion – 1 sp...
Competitive Exclusion
Character displacement
Succession- gradual sequential growth         of species in an area• Primary Succession – Development of a  community in a...
Species interactions
Species interactions
Species interactions
Species interactions
Species interactions
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Species interactions

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Species interactions

  1. 1. Species Interactions 5 major types of symbioses-Close interactions among species.
  2. 2. • Predator captures, kills, and consumes prey.• Determines relationships in food web.• Regulates population size.• Adaptation in predators and prey due to Natural Selection.
  3. 3. Mimicry
  4. 4. Herbivores are predators, plants prey!• Plants have defenses as well. Secondary compounds = toxic but can be medicinal.• Stinging Nettle Night Shade
  5. 5. Parasitism• Parasite benefits, host is harmed.• Ecto – outside Endo- inside
  6. 6. Mutualism• Both species benefit.
  7. 7. Commensalism• One species benefits, the other is “neutral”
  8. 8. Competition• Results from niche overlap- use of same limited resource by 2 or more SPECIES.• Competitive Exclusion – 1 species uses resource and other is eliminated (NS)• Character Displacement – Evolution of anatomical differences that reduce competition between similar species.• Resource Partitioning- reduced competition.
  9. 9. Competitive Exclusion
  10. 10. Character displacement
  11. 11. Succession- gradual sequential growth of species in an area• Primary Succession – Development of a community in an area that has not supported life previously.• Secondary Succession – DUH! Sequential replacement of species that follows a disruption of an existing community.• Pioneer Species – predominate early in succession, tend to be small, fast-growing, fast reproducing.• Climax community –DUH!
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