TOPIC: Ecology AIM: What is ecological succession?
Why do ecosystems change? living things change ecosystems to make them more suitable -But by doing this they make it less suitable for themselves and more suitable for other organisms. Why do ecosystems change?
Ecological Succession When an existing community is slowly replaced by another until a stable one exists
Pioneer Organism 1st organisms Start succession Bacteria, fungi, lichens Pioneer Organism
Stable, mature community Forest Climax Community
Remains until catastrophic event (fire, flood, volcanic eruption…) Successions starts again
What are some other examples of primary and secondary succession?
Stages of Succession in a Pond
Succession in lakes or ponds Fig 10.7 Diagram of bog succession. Open water (a) is transformed through formation of a floating mat of sedge and deposition of sediments (b) into wetland forest (c). © 2003 John Wiley and Sons Publishers