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20.1: Species Interactions (Part III)

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Presentation on theme: "20.1: Species Interactions (Part III)"— Presentation transcript:

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. asset/nat08_vid_travcom/

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

5 Parasitism: +/- (but not killed)
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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