A. What is a community?
1. assemblage of populations in a common area
-Alpine Forest in Snowy Range, Medicine Bow Mountains, Wyoming
-mighty fortress tree
2. What are the properties of a community?
insects in Texas prairies
B. Interspecific Interactions
1. What types of interactions occur?
-Competitive Exclusion Principle
-experiments with Paramecium species:
-if two species compete for the small resources one will become extinct
-What is the niche?
resource partitioning in lizards
-What are the types of predation?
Examples of predator adaptations
-acute vision in falcons
-heat sensing in rattlesnakes
Examples of prey adaptations:
3. Commensalism and Mutualism
C. Trophic Structure of a Community
1. What does "trophic" mean?
2. What are food chains?
What is the pattern of trophic levels in the food chain?
3. What is a food web?
4. What limits the length of a food chain?
-the impact of thermodynamics on energy conversion
D. Disturbances and Community Structure
1. Are communities stable or do they change?
Is there a "balance of nature"?
2. What is the impact of routine disturbances?
3. What is the impact of major disturbances?
-role of ecological succession
a. primary succession
-newly formed volcanic islands (Surtsey)
-Mt St. Helens
-steps of primary succession:
succession pattern of vegetation
changes in soil nitrogen
b. secondary succession
-Yellowstone fires Yellowstone in 2006