1. Date: May 20, 2016 Aim #87: How do ecosystems change over time? HW: 1 ) Ecology Review Packet 2) Ecology Test Tuesday 5/24 (periods 1&7) and Wednesday 5/25 (periods 5) 3) Unit 7f due Friday, May 27th Do not forget Castle Learning!! Do Now: Warm-Up Notebook DateTitle of Activity Page # 5/20The Nitrogen Cycle128

2. Aim #87: How do ecosystems change over time?

3. Are forest fires an ecosystems worst nightmare? Why or why not? Movie: Firestorm

4. 1) Ecological Succession The process by which an ecosystem changes over time – often from a barren piece of land to a complex ecological community..

5. 2) Ecological Succession In a Forest As time passes grasses grow & then get replaced by shrubs and eventually a forest will form. Why do the grasses disappear? The large shrubs and trees prevent light from reaching the grasses.

6. 3) Ecological Succession in Ponds & Lakes? As time progresses, the pond gets filled in with dead organic matter. The dead organic matter takes the place of the water in the pond or lake. Eventually a forest form where the pond once was.

7. 4) What is the final state of ecological succession A climax community with great biodiversity

9. Destruction of Climax Communities Fires, volcanic eruptions, tsunamis, deforestation, acid rain Their destruction often (but not always) means the birth of a NEW community via succession.