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20.1: species interactions (part iii)

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20.1: SPECIES INTERACTIONS (PART III)

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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 - PowerPoint PPT Presentation

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Page 1: 20.1: Species Interactions (Part III)

20.1: SPECIES INTERACTIONS (PART III)

Page 2: 20.1: Species Interactions (Part III)

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

 

Page 3: 20.1: Species Interactions (Part III)

A. MUTUALISM

Mutualism: ( +/+) both benefit EX. Clown fish get shelter and

anemone gets free cleaning. http://www.pbslearningmedia.org/asset/nat08_vid_travcom/

http://www.pbslearningmedia.org/asset/nat08_vid_travcom/
http://www.pbslearningmedia.org/asset/nat08_vid_travcom/
Page 4: 20.1: Species Interactions (Part III)

B. COMMENSALISM

Commensalism: (+/0) one benefits and one neutral

EX. Barnacles on Grey Whale

Page 5: 20.1: Species Interactions (Part III)

C. PARASITISMParasitism: +/- (but not killed)

EX. intestinal worms / humans 1. parasite: small and lives on or in the host organism

Page 6: 20.1: Species Interactions (Part III)

C. PARASITISMParasitism: +/- (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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