1. Section 4-2 What Shapes an Ecosystem?

2. Ecosystem
Biotic components
Abiotic components
Ecological interactions

3. Habitat The area where an organism lives. Analogy - address
Yellow Rumped Warbler
Address coniferous forest

4. Niche The place the organism occupies in the food web
Includes type of food, how it gets food, who uses it as food, how it reproduces.
Analogy - occupation

5. Figure 4-5 Three Species of Warblers and Their Niches
Section 4-2
Cape May Warbler
Feeds at the tips of branches
near the top of the tree
Bay-Breasted Warbler
Feeds in the middle
part of the tree
Yellow-Rumped Warbler
Feeds in the lower part of the tree and
at the bases of the middle branches
Spruce tree

6. Community Interactions
Competition
Predation
Symbiosis
Mutualism
Commensalism
Parasitism

7. Competition Resources in use at same place at same time
Individuals of the same species often compete
The habitat can be partitioned through time or space
Kit Fox
Burrowing Owl

8. Predation
When one organism feeds on another

9. Symbiosis Mutualism – both benefit
Commensalism – one benefits, the other neither helped nor harmed
Parasitism – one benefited, one harmed

10. Succession
Primary – from nothing to climax community