- 1. Patterns in communities
2. Community
- Set of interacting populations at a particular time in a
particular place
3. Characteristics
- Stable communities have high diversity
- A few species are dominant
- Always more producers than consumers
4. Patterns
5. Succession
- Change in species composition over time
-
- Sequence of stages of a community during succession
-
- Stable community where succession is no longer occuring
6. Primary Succession
- On an area that has had no previous life
- First colonisers usually lichen
- Dead lichen forms humus allowing mosses, then ferns and bracken
to grow
7.
- Larger trees grow in shelter of manuka
- Climax community finally reached
8. Rangitoto an example of primary succession 9. Secondary
Succession
- When an existing community has been cleared
- Eventually returns to original state by gradual
replacement
- First colonisers short living weeds
- Longer living species in later stages
10. Plants growing again after a fire has killed off existing
bush 11. Stratification
12. The Canopy 13. Tree Fern Layer 14. Shrub Layer 15. Emergents
16. Vines 17. Vines and Saprophytes 18. Zonation
- Bands of organisms form in relation to a gradient in a major
environmental factor
19. Zonation on Mountains 20. Zonation on a Rocky Shore 21. 22.
23. Zonation in Rock Pools 24. Hormosira (Neptunes Necklace) 25.
26. Crabs 27. 28. 29. 30. Sea Anemones