2. Warm Up Shown here is some lichen on a rock.. A. What is lichen? B. What type of biotic interaction would it be classified as? Why? C. What role does it serve in ecological succession? Once you’ve answered the questions above, sign up for a biome to do your homework on – the sign up is on the front board on the clipboard

3. What Shapes an Ecosystem? Chp 4-2

4. How do abiotic factors influence biotic?

6. Niche vs. habitat Habitat the address Niche the role

7. Biotic Interactions CompetitionCompetition & the Competitive Exclusion Principle

8. Biotic Interactions PredationPredation (+/-)

9. Symbiotic Biotic Interactions MutualismMutualism (+/+) ant/catepillar ant/catepillar Commensalism (+/0) Parasitism (+/-) (how’s this different from predation?)

10. Succession Orderly change over time of natural species replacement in a community or ecosystem

11. Succession communities: 1.Pioneer species 2. Intermediate species 3. Climax community

12. Pioneer species: Lichens (algae & fungi) break apart rock to make soil Grasses Annual flowers Mosses

13. Climax Community: final set of organisms suited to that climate

14. Types of Succession Primary 1 st time plants or animals are established New island Volcanoes Glaciers Bare soil, rock Secondary After a “blowout” Re-establish a community Already had living organisms Fire, flood, human disruption

15. New island= Primary Succession

16. Secondary Succession will follow !

17. Primary Or Secondary?

18. BOTH PRIMARY & SECONDARY have these Succession communities : 1.Pioneer species 2. Intermediate species 3. Climax community

19. San Diego Succession