Name: ___________________________________
Chapter 6 guided notes
1. Nature Exists at Several Levels of Complexity (fig 6.1)
2. Factors that Regulate Population Abundance and Distribution
- Population size-
Population density-
-
Population distribution-
-
Population sex ratio-
-
Population age structure-
3. Population Inputs and Outputs (fig 6.2)
4. Population distributions (fig 6.3)
- clumped
-
Random
-
uniform
5. Factors that Influence Population Size (fig 6.4 Gause’s experiment)
- Density-dependent factors-
Density-independent factors-
6. Exponential Growth Model (fig 6.5)
- J-shaped curve- Equation: _____________________________
- Draw and label the growth curve
7. Logistic Growth Model (fig 6.7)
- Logistic growth- when a population whose growth is initially exponential, but slows as the
population approaches the carrying capacity.
- S-shaped curve
- Draw and label the growth curve
8. Variations of the Logistic model (fig 6.8, 6.9,6.10)
- If food becomes scarce, the population will experience an overshoot by becoming larger
than the spring ______________and will result in a die-off, or population crash.
- Draw and Label the oscillations of a logistic curve due to recurring cycles of overshoots and
die-offs. This pattern includes changes in a population due to a predator prey relationship.
9. Reproductive Strategies
- K-selected species-
-
R-selected species-
10. Reproductive Strategies (table 6.1, Fig 6.12)
- Traits of K and R Species
11. Metapopulations (fig 6.13)
- Metapopulations-
*Interaction between organisms
12. Competition and species interactions (fig 6.14, 6.15, 6.16)
- Competition-
-
Resource Partitioning –
13. Predation (fig 6.17)
- Predation- True predators-
Herbivores-
-
Parasites-
-
Parasitoids-
14. Mutualism (fig 6.18)
15. Commensalism (6.19)
*A summary of Interactions between species (table 6.2)
16. Keystone Species (6.20, 6.21,6.22) … an example of keystone predator influence
The composition of a community over time
17. Primary Succession (fig 6.23)–
Draw a plant community showing changes in population
18. Secondary Succession –
-
Comparing figures (fig 6.13 and fig 6.24), describe how these illustrations differ
19. Succession also includes aquatic ecosystems (fig 6.25)
20. Richness is termed by latitude, time, and distance from other communities
21. Theory of island biogeography (fig 6.26) – look at graph.
- The theory of island geography -