community interactions eq: how do the three types of symbiosis differ?
TRANSCRIPT
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Community Interactions
EQ: How do the three types of symbiosis differ?
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Types of Interactions
CompetitionPredationSymbiosis
MutualismCommensalismParasitism
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Competition (-/-)Organisms of the
same or different species attempt to use the same ecological resource in the same place at the same time Bison
Elk Herd
Moose
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Competition
Interspecific competition: Competition between members of different species
Intraspecific competition: Competition among members of the same species
Blue Butterfly
Tiger Swallowtail butterfly
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Competitive exclusion principle:
No two species can occupy exactly the same niche in exactly the same habitat at exactly the same time.
One will always exclude the other
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Predation (+/-)
Herbivory:
• Type of predation
• Interaction in which an herbivore feeds on producers.
predator
prey
Falcon
Ground Squirrel
Interaction in which one organism captures and feeds
on another organism
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PredationKeystone species: a single species that is vital to the ecosystem stability.
Ex. Otters/kelp/sea urchins
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Predation
Rabbit and Coyote
rabbitcoyote
Arctic Hare
Coyote
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Symbiosis
Any relationship in which two species live closely together is called symbiosis (“living together”)
MutualismCommensalismParasitism
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Mutualism (+/+)
Both organisms benefit
o Examples:
o Flowers and insects
o Ants and aphids
Bee on Purple Flower
Ant and Aphid
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Mutualism (+/+)Lichen
Algae and fungus living together
Lichen
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Commensalism (+/0)One member of the
association benefits and the other is neither helped nor harmed.
Spanish Moss
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Commensalism (+/0)
Whales & Barnacles
Barnacles on Whale
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Commensalism (+/0)
Epiphytes
“air plants”
EpiphyteEpiphyte in Tree
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Parasitism (+/-)
Ticks
The parasite obtains all or part of its nutritional needs from the other organism, the host.
Blacklegged Tick: An adult female blacklegged tick, engorged after a
blood meal, rests on a leaf.
BeforeAfter
Black Legged Tick
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Parasitism (+/-)
One benefits; one harmed
Examples: tapeworms inside mammals; fleas, ticks, and lice on mammals
Female Head Lice