Ecosystems

Objective One

• Distinguish an ecosystem from a community.

http://www.youtube.com/watch?v=eds62GVFOwM

Explain the difference between

Ecosystem Community

Factors in an environment

• Abiotic Factors: The physical aspects of the environment which are not alive.

• Biotic factors: The organisms in a habitat.

List Five

• Abiotic Factors in Elgin1. 2. 3. 4. 5.

• Biotic factors in Elgin1. 2. 3. 4. 5.

Biodiversity

• Lake Chad• Potatoes in Peru• Ethiopia • Cambodia

http://www.youtube.com/watch?v=VYaaZjY20yA

Chad Peru

Ethiopia Cambodia

Objective 16.2

• Describe the diversity of a representative ecosystem

What can we learn

• Look for the importance of biodiversity.• Look for

examples and relationships

• Be ready to write about the left hand side. I will give you TIME and INSTRUCTIONS.

Wrapping up Biodiversity

• Many populations can be hidden.• Tons of worms live underground and beetles

and spiders can be hidden under a trees bark or forest floor leaves.

• Protists(tiny) might live in water• Billions of bacteria can exist in a handful of

soil.

Example protist

• Amoeba (don’t write this! It won’t help you.)

Detritivores

Bacteria: Single celled Fungi: usually multi celled

Objective 16.3

• Sequence the process of Succession.

Changes in an ecosystem over time

• Muir Glacier; Alaska 1940

Changes in an ecosystem over time

• Muir Glacier 2004 (Same place)

Almost Done!

•Yeah!

Succession

• Species replacement over time

Sucession

• Pioneer species(first to show up)

Definitions

• Some of you are going to be sooooo busted in 10 seconds

Defintions

• Succession: Regular progression of species replacement in an environment• Primary succession: Succession where

life has not occurred before.• Secondary succession: Succession

where life has occurred before. Like abandoned farm field.(forest preserve)

Example Secondary

• Elgin! Fitchie Creek Forest Preserve

Example Primary Succession

• Mt Saint Helens

• http://www.youtube.com/watch?v=4RsMyVavT2Q