1. Write the answers ONLY in your journal.
Name two limiting factors for a population of mice that live in a desert biome.
What does biodiversity mean?
What does sustainability mean?
Give an example of how humans reduce biodiversity.
What form of energy is food?
What is the function of a decomposer?
Name a producer.

2. Do you think the the ecosystems we studied will stay the same?

3. Changes in Ecosystems: Ecological Succession

4. Definition: Ecological Succession
The gradual changes in the types of species that live in a community

5. Primary Succession In a place without any soil.
Sides of volcanoes
Landslides
Flooding
Starts with the arrival of a PIONEER SPECIES (lichens and moss) that do not need soil to survive

7. Primary Succession
Soil starts to form as lichens and the forces of weather and erosion help break down rocks into smaller pieces
When lichens die, they decompose, adding small amounts of organic matter to the rock to make soil

9. Primary Succession
Simple plants like mosses and ferns can grow in the new soil

10. Primary Succession The simple plants die, adding more soil
Grasses begin to take over

11. Primary Succession
These plants die, and they add more nutrients to the soil
Shrubs and tress can survive now

12. Secondary Succession
Begins in a place that already has soil and was once the home of living organisms
Occurs faster and has different pioneer species than primary succession (starts with grass)
Example: after forest fires

16. Climax Community
A stable group of plants and animals that is the end result of the succession process(reaches equilibrium).

17. Lets go make our own community move through succession.
Each person cut out the pictures and the words.
Match the words and pictures.
Then put them in the correct order.
Call me over to check it.
Glue it in your journal.

18. What type of succession did we create from the pictures
What type of succession did we create from the pictures? What is missing in the ecosystem?

19. Primary Succession Animals start with Insects
Then small birds and reptiles.
Finally larger mammals.
What was once
bare rock now
supports a
variety of life!

20. Add appropriate animal species to your pond succession pictures.