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AP Biology
Community Ecology
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AP Biology
Community Ecology Community
all the organisms that live together in a place interactions
Community Ecology study of
interactions among all populations in a common environment
To answer:In what way do these populations interact?
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AP Biology Fundamentalniches
RealizednichesHigh tide
Low tide
Species 1
Species 2
Niche & Habitat ECOLOGICAL NICHE~ the sum total of an organism’s
use of biotic and abiotic resources in its environment; its “ecological role”
Chthamalus sp.
Semibalanus sp.
Habitat- is an area
where an organism
lives.
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AP Biology
Interspecific interactions Community interactions
parasitism (-/+) commensalism (+/0)
barnacles attached to whale
mutualism (+/+) Water buffalo and Egret
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AP Biology
Parasitism In a parasitic relationship, one
organism benefits (parasite) while the other organism is harmed (host)
Examples-fleas, ticks, tapeworm, mosquito
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AP Biology
Commensalism In commensalism, one organism
benefits, while the other is not affected Examples – spanish moss growing on
trees, or barnacles growing on whales commensalism example
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AP Biology
Mutualism In a mutualistic relationship, BOTH
organisms benefit Examples – lichen (algae and fungus),
pollinators (insects, bats, birds, etc) Mutualism video
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AP Biology
Symbiotic Interactions Symbiosis is a close ecological relationship
between the individuals of two (or more) different species.Types of Symbiosis
Description
Commensalism Relationship in which one organism benefits, but the other in neither helped nor harmed
Parasitism Relationship in which one organism benefits and the other is harmed in some way
Mutualism Relationship in which both organisms benefit
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AP Biology
commensalism
Parasitism
Symbiosismutualism +/+
+/-
Commensalism +/0
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AP Biology
What relationship is this?
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AP Biology
Activity – Community Interactions Groups of three
Answer the questions Symbiotic interactions include:
CommensalismMutualismParasitism
Be prepared to share 15 minutes
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AP Biology
RECAP!! I will give you three separate
answers and you must give me a QUESTION that fits the answer.• A close ecological relationship between the individuals of two (or more) different species.
•A mosquito biting into a human’s arm
•Relationship in which one organism benefits, but the other is neither helped nor harmed