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.

• 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.angler/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/1zqb8l5Uy2OTy0dIXYOh318_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!