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Components of an Ecosystem-Biotic Factor Interactions

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Identify different relationships between

organismsEvaluate the differences between theserelationshipsCreate your own examples of differentrelationships between organisms in nature

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S ymbiosis- the close association between

two organisms of different species

S ymbiotic relationships take on three forms: Parasitism Mutualism Commensalism

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Mutualism- both organisms benefit (+/+)

Ex/ hummingbird and flower or bees andflowers

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Commensalism: One organism benefits and the

other is not affected at all. (+/0)EX/ clown fish lives among the tentacles of a seaanemone.

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Predation-a "+/-" interaction, includes

predator-prey, herbivore-plant, and parasite-host interactions.Predation is an important factor in theecology of populations, determining mortality

of prey and birth of new predators.

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T he predator is the organism that hunts

T he prey is the organism that is being huntedPredator-prey cycle: predators increase when preyare abundant, prey are driven to low numbers bypredation, the predators decline, and the preyrecover