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20.1: Species Interactions (Part III)

20.1: Species Interactions (Part III). 3. Symbiosis- close ecological relationship between two or more organisms of different species that live in direct contact. MUTUALISM. Mutualism : ( +/+) both benefit

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20.1: Species Interactions (Part III)

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  1. 20.1: Species Interactions(Part III)

  2. 3. Symbiosis- close ecological relationship between two or more organisms of different species that live in direct contact

  3. MUTUALISM • Mutualism: ( +/+) both benefit EX. Clown fish get shelter and anemone gets free cleaning.http://www.pbslearningmedia.org/asset/nat08_vid_travcom/

  4. B. COMMENSALISM • Commensalism: (+/0) one benefits and one neutral EX. Barnacles on Grey Whale

  5. C. PARASITISM • Parasitism: +/- (but not killed) EX. intestinal worms / humans 1. parasite: small and lives on or in the host organism

  6. C. PARASITISM • Parasitism: +/- (but not killed) EX. intestinal worms / humans 1. parasite: small and lives on or in the host organism 2. weaken the host 3. evolutionary adaptation kept the host healthy enough to allow parasite reproduction

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