Aim: How can organisms in an ecosystem interact with each other?

Why do organisms interact with each other?

• In most ecosystems, animals live with other organisms.

• They live within a group of their own kind called a population.

• They live with other groups of animals called communities.

Organisms interact in 3 ways :

1. Competition

What are the ways that organisms interact?

Competition• Competition occurs when organisms

fight over limited resources

• These resources could be:

Food and Water

Territory

Mates

http://www.youtube.com/watch?v=zj8istSAMoY

2. Predation- one organism kills and eats another

Predation involves a predator (the hunter) and the prey (the hunted)

http://www.youtube.com/watch?v=yirHPVxSMgc

• http://www.youtube.com/watch?v=XafAdkZIYKA

3. Symbiosis- two organisms “live together”

There are 3 Types of Symbiosis:

1) Mutualism- 2 different species that live together and both benefit from the relationship

2) Parasitism-2 different species that live together and one benefits from the relationship while harming the other

3) Commensalism-2 different species that live together and one benefit from the relationship while the other receives no benefit

http://www.youtube.com/watch?v=vR9X3gFTpL0&feature=related

http://www.youtube.com/watch?v=kwK4yJ6tTmc

Mutualism: Oxpeckers and Mammals

Mutualism: Flowers and Bees

Mutualism: Clown Fish and Anemones

http://www.youtube.com/watch?v=Qqa0OPbdvjw

http://www.youtube.com/watch?v=kwK4yJ6tTmc

http://www.youtube.com/watch?v=dJRJCO59bf4

Parasitism: Ticks and Dogs

Parasitism: Tapeworms and Mammals

http://www.youtube.com/watch?v=9fmx24FbZoM

http://video.google.com/videosearch?q=mutualism&hl=en&emb=0&aq=3&oq=mutual#q=Parasitism&hl=en&emb=0&start=10

http://www.youtube.com/watch?v=vMG-LWyNcAs

Commensalism: Sharks and Remoras

• http://www.youtube.com/watch?v=dAU5MTXmAPY&feature=results_main&playnext=1&list=PL0A7A2379A3D95470