1. Warm Up #11
What happens during ecological succession?

2. Ch. 5 Biomes and Ecosystems
Lesson 3: How Ecosystems Change

3. Essential Questions How do land ecosystems change over time?
How do aquatic ecosystems change over time?

4. How Do Communities Change? ACTIVITY
An ecosystem can change over time. Change usually happens so gradually that you might not notice differences from day to day.
Look at community A and community B.
What do you think community A might look like midway in its change to becoming like community B.

5. Warm Up #12
What’s the difference between primary and secondary succession?

6. How Land Ecosystems Change
Ecological succession – the process of 1 ecological community gradually changing into another
Occurs in a predicted series of steps
Ex. Small plants grow before big plants
Climate community – a stable community that no longer goes through major ecological changes

7. How Land Ecosystems Change
Primary succession – ecological succession in new areas of land with little or no soil
Pioneer species – the 1st species that colonize new or undisturbed land
Secondary succession – areas where ecosystems have been disturbed or destroyed

8. Primary Succession

9. Secondary Succession

10. How Freshwater Ecosystems Change
Aquatic succession – freshwater ecosystems change over time in a natural predictable process
Eutrophication – the process of a body of water becoming nutrient-rich