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Symbiosis & Species Interactions Keystone Webquest
BIO.B.4.2.2 Describe biotic interactions in an ecosystem (e.g., competition, predation, symbiosis).
When ecologists talk about species interactions, they are talking about how organisms in the same community
interact with one another. Most of the interactions between species involve food: competition for the same
food supply, eating (predation), avoiding being eaten (avoiding predation). These interactions are often brief.
There are many cases, however, where two species live in close association for long periods of time. Such
associations are called symbiosis ("living together"). There are three types of symbiotic relationships:
parasitism, commensalism, and mutualism. Use the websites below to learn more about these interactions.
Go to: https://www.youtube.com/watch?v=zSmL2F1t81Q Watch a video that introduces symbiosis.
Go to: http://www.marietta.edu/~biol/biomes/symbiosis.htm
Type of Symbiosis
Definition of interaction
Parasitism
Commensalism
Mutualism
Identify and explain the type of symbiosis displayed by the following organisms:
Organisms
Type of Symbiosis
Explanation
Ex: Tapeworm
Ex. Parasitism
Ex. Tapeworm gets nutrients and a home while
Human
living inside the human. The human doesn’t get all
the nutrients it needs.
White-winged dove
Sagaro Cactus
Cattle egrets
Grazing Animals
Oxpecker Birds
Rhino
Mosquitoes
Warm-Blooded Animals
Clownfish
Anemone
Organisms
Sea Lamprey
Fish
Type of Symbiosis
Explanation
Bromeliad Orchids
Tree Branches
Go to: http://video.nationalgeographic.com/video/news/zombie-snails-zimmer-vin?source=relatedvideo
Watch the “Zombie Snails” video.
As you watch the video, decide which organisms are the following.
Who is the parasite
Who is the host?
Who is the predator?
Who is the prey?
Watch the selected clips and answer the following questions:
Clip 1: Shark & Turtle
https://www.youtube.com/watch?v=Q_D51Ui_XMI&index=3&list=PL0xGI90Ms9nqev94wwPzzo377ckNXlSL4
How does the turtle protect itself?
Explain relationship is held between
the tiger shark and the loggerhead
turtle.
Clip 2: Unlikely Travel Companions
https://www.youtube.com/watch?v=-XJA6I2JJ4c&list=PLg9pBnvxTUxMKX-9UhOSz7CrEcofFmSvK
List three ways in which being near a
shark might be beneficial to a fish.
Classify each shark-fish relationship
shown in this clip as commensalism,
mutualism, or parasitism.
Mackerel/SharkSuckerfish / Shark –
Barber fish / Hammerhead-