Living Together: Community Interactions

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Living TogetherCommunity Interactions
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Symbiosis

• Symbiosis TogetherLiving
• Definition
• Symbiosis is a close ecological relationship
  between the individuals of two (or more)
  different species.  

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Who Benefits?

• Sometimes a symbiotic relationship benefits both
  species, sometimes one species benefits at the
  other's expense, and in some cases neither
  species benefits.

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Types of Interactions

• Commensalism, Mutualsim, Interspecific
  Competition, Predation, and Parasitism are all
  examples of symbiotic relationships.

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Neutral Relationship

• Neither species benefits from the interaction

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Commensalism

• One species benefits, the other is unaffected

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Mutualism

• Both species benefit from the interaction

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Interspecific Competition

• Neither species benefits from the interaction

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Predation

• One species (predator) directly harms the other
  (prey)

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Parasitism

• One species benefits (parasite), the other is
  harmed (host).

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Table of Interactions
Type of Interaction Effect on Species 1 Effect on Species 2
Neutral relationship 0 0
Commensalism 0
Mutualism
Interspecific Competition - -
Predation -
Parasitism -