Ecosystem Dynamics Part 2

Ecosystem Dynamics Part 2

Biology 2020-2021

Symbiosis-A close relationship between 2 organisms

• Parasitism-one organism benefits and one organism is harmed. Not predation because no organisms are killed (initially)

• Commensalism-one organism benefits and one organism is neither benefited or harmed

• Mutualism-both organisms benefit

Multiple Select

Which of these is an example of parasitism?

• A clownfish living in a sea anemone.

• A tick on a dog

• A barnacle on a whale

• Bees and flowers

Multiple Select

Which of these is an example of mutualism?

• A clownfish living in an anemone

• A tick on a dog

• A barnacle on a whale

• Bees and flowers

Biodiversity

The variety of species in an ecosystem.

Keystone Species-a species that has an especially strong effect on an ecosystem

• Whatever happens to this species has an effect on the WHOLE ecosystem!

Open Ended

What would be an example of a keystone species in an ecosystem? Why do you think this species is so important to that particular ecosystem?