Aim: How is primary and secondary ecological succession different? DO NOW Describe what you see is taking place in this picture.

Ecological Succession Land or water communities changing over time 2 types: primary & secondary A stable climax community is the end result of succession An example of a climax community is a beech-maple forest or an oak-hickory forest (both hardwood forests)

Primary Ecological Succession An area of bare rock changing into a beech-maple forest Takes a long period of time to happen As time goes on, grass replaces lichens (pioneer organisms), shrubs replace grasses, pine trees replace shrubs, oak trees replace pine trees and beech & maple trees replace oak trees

Image of Primary Succession

Death & Decomposition As new plant life replaces old plant life, death of plants & the action of decomposers enrich soil in the area, making it more rich, allowing for more complex plant life to grow

Climax Community A climax community will stay stable and exist only until a catastrophe takes place, such as a flood, fire or a volcanic eruption If the climate or soil is the same after the catastrophe, the same climax community will grow back into existence If the climate or soil is different, a different climax community will take the old community’s place

Animals As plants in an area undergoing ecological succession change, animals change, too!

Secondary Ecological Succession A process of change taking place in an area with a mature community, where a catastrophe or disturbance has taken place Soil remains Area will undergo secondary ecological succession Takes less time than primary ecological succession

Secondary Ecological Succession

Primary vs. Secondary Ecological Succession

Video https://app.discoveryeducation.com/learn/videos/71D74AE7-B539-4B2D-8BE2-82A6EA09D826?hasLocalHost=false

Q: Primary or Secondary Ecological Succession?

Animation & Group Activity http://www.mrphome.net/mrp/succession.swf

Individual Activity On loose-leaf, answer the AIM for today This will be your exit slip Leave it on my desk, before you leave today!

Homework Read txt. pgs. 62-64 & answer questions 1, 2 & 4 on pg. 64