APES Unit 4: Chapter 8 Community Ecology
APES Unit 4: Chapter 8 Community Ecology
Characteristics of Community:
1. physical appearance
2. species diversity
3. niche structure
Diversity on Islands:
MacArthur/Wilson
Species equilibrium model/theory of island biogeography
# of different species on the island = the rate at which new species immigrate to t he island and the rate at which existing species become extinct
**** rates should come to _____________
2 features affect immigration:
1.
2.
Types of Species:
Native:
Nonnative:
Indicator species:
Example: frogs!
Keystone species:
Foundation species:
Interaction of Species:
1. Competition
Resource partitioning:
2. Predation:
How does the predator increase his chances?
How does the prey increase his chances?
3. Parasitism:
4. Mutualism:
5. Commensalism:
Ecological Succession:
Primary Succession
Secondary Succession
3 Factors that affect succession rate:
1. facilitation
2. inhibition
3. tolerance
Disturbances:
Balance of Nature:
*** We cannot project the course of a given succession or view it as a preordained progress toward an ideally adapted climax community****
3 Aspects of stability/sustainability:
1. inertia/persistence:
2. constancy:
3. resilience:
................
................
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