Ecological
Interactions
Cornell Notes and Q’s:
• Take 2 pages of Cornell Notes based on the information you
learn about in this presentation.
• Answer the Questions you see included on the slides. (Q:)
• These notes will be included in a notebook check. 20 pts
• There will be also be a quiz at the end…
Interactions in Ecology
• Organisms interact with each other in specific ways.
• In this presentation, you will learn about these specific
interactions.
• Learning Target:
• I can define and give examples of ecological interactions in
nature
Predator / Prey
• Predators hunt and eat prey.
• Predators are often 2nd or 3rd level consumers.
• Prey is often 1st or 2nd level consumers.
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Examples:
Snake and mouse
Lion and zebra
Wolf and moose
Q: Can you give 3 more examples?
Angler Fish video
• Watch the 2 minute video about the predatory angler fish
here:
• http://tpt.pbslearningmedia.org/resource/tdc02.sci.life.stru.a
ngler/anglerfish/
• (copy and paste the link above into a new internet window)
• Q: In ONE sentence, summarize what you saw in the video.
Symbiosis
• Symbiosis is when 2 species interact with each other in a way
that either HELPS, HARMS, or DOESN’T AFFECT them.
• There are 3 types of Symbiosis:
• Mutualism
• Both species interacting BENEFIT from the interaction
• Parasitism
• One species BENEFITS, one species is HARMED
• Commensalism
• One species BENEFITS, one is completely unaffected
Mutualism
• Examples:
• Bees and Flowers
• The bees gets food from the flower (pollen), the flowers get
pollinated by the bees flying around from flower to flower.
• Clownfish and Sea Anemone
• The clown fish gets protection from predators from the
stinging anemone, the anemone gets cleaned by the clownfish
eating the debris in the spines.
• Q: Can you name another example?
Parasitism
• Examples:
• Dogs and Ticks
• The dog is HARMED by the tick (diseases, itch, rash) and the tick
BENEFITS from the blood (food) of the dog.
• Fish and lampreys
• The fish is HARMED by the lamprey (leech) and the lamprey
BENEFITS from the blood (food) of the fish
• Q: Can you name another example?
Gross Parasite Video!
• Watch the 4 minute video of the grossest parasite you’ll
see…the tongue-infesting parasite.
• http://www.pbs.org/wgbh/nova/nature/tongue-parasite.html
• (copy and paste the link above into a new internet window)
• Q: What is unique or special about the tongue infesting
parasite? Name 2 things.
Commensalism
• Examples:
• Barnacles and Whales
• Barnacles get a free home and a ride on the whale’s skin, but the
whale is not affected by them at all.
• Pearlfish and sea cucumber
• Pearlfish get a free home in the anus of the sea cucumber, but
the sea cucumbers don’t care at all.
• Q: Can you name another example?
Intraspecific Interactions
• Individuals of the same species compete for the same
resources in an ecosystem. (food, water, space, mates)
• Herds, flocks, packs
Interspecific Interactions
• Individuals of different species compete for the same
resources in an ecosystem (food, water, space)
Google Forms
• Please submit a google form quiz based on these notes for your
assignment today.
• Access the form at:
•
https://docs.google.com/a/mpls.k12.mn.us/forms/d/1zqb8l5Uy2OT
y0dIXYOh318_WuEvyCFG_mik-ENv0-oo/viewform
• (Copy and paste the link above into a new internet window)
• Sign in with your Mps username and password
• Thanks!