Aim How is primary and secondary ecological succession

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 beechmaple forest or an oak-hickory forest (both hardwood forests)

Primary Ecological Succession • An area of bare rock changing into a beechmaple 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/vid eos/71 D 74 AE 7 -B 539 -4 B 2 D-8 BE 282 A 6 EA 09 D 826? has. Local. Host=false

Q: Primary or Secondary Ecological Succession?

Animation & Group Activity • http: //www. mrphome. net/mrp/succession. sw f

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