Wednesday, January 7, 2009

(Form 4) Dynamic Ecosystem

SYMBIOSIS
Definition: a close interaction between two different species which live together and interact with each other for an extended period of time

Commensalism (+,0) is a interaction where the commensal partner benefits while the other (host) derives neither benefit nor harm.

Example of commensalism: Clown fish and sea anemones



Read more about "commensalism" in your text book (pg. 251)

Mutualism (+,+) is a relationship between two species of organisms in which both organism benefits.

Example of mutualism: Bird and water buffalo



Read more about "mutualism" in your text book (pg. 252)

Parasitism (+,-) is a symbiotic relationship in which one organism benefits while the other is harmed.

Example of parasitism: Rafflesia sp.



Read more about "parasitism" in your text book (pg. 252)

Saprophytism is a type of interaction in which living organisms obtain food from dead and decaying organic matter.

Example of saprophytism: mushrooms



Read more about "saprophytism in your text book (pg. 253)

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