Download Ch 5 Notes to Fill In

Ch 5: Biodiversity, Species Interactions, and Population Control
Include and address the following concepts and ideas using visual presentations, reference to textbook
information and other examples, handouts, pictures, appropriate video clips
5-1 How Do Species Interact?
1. What is interspecific competition? Provide an example that illustrates interspecific competition.
a. What is the competitive exclusion principle? Provide an example that illustrates the competitive
exclusion principle.
2. What is predation? What are four techniques prey use to avoid predators?
a. What is coevolution? How do predator prey relationships illustrate coevolution? Provide one
example of coevolution?
3. Summarize the Science Focus: Why Should We Care About Kelp? Include in your answer the threats to
the kelp forest and the species interactions that are necessary to maintain life in the kelp forest.
4. Fill in the following chart
Type of relationship
Definition
+ = one species
benefits
- = one
species is
harmed
0 = the species
is neither
harmed nor
benefited
Example
Parasitism
Mutualisms
Commensalism
5-2 How Can Natural Selection Reduce Competition between Species?
1. What is resource partitioning? For what purpose does resource partitioning serve?
a. Provide an example of resource partitioning not included in the reading.
5-3 What Limits the Growth of Populations?
1. What is population dynamics?
a. Changes in populations characteristics are due to several factors. Identify at least 3 of these
characteristics.
2. Your textbook identifies three ways populations distribute themselves. Identify the three ways
populations distribute themselves.
a. Identify and describe 5 reasons why clumping is beneficial.
3. What is an example of a species that has a low biotic potential? High biotic potential?
a. What is the intrinsic rate of increase (r)?
i. What are 4 characteristics of populations with a high r?
4. What are 4 limiting factors acting upon populations?
5. Define the following vocabulary words
a. Environmental resistance
b. Carrying capacity (K)
c. Exponential growth (J curve)
d. Logistic growth (S curve)
6. Fill in the following diagram
5 limiting factors acting upon these populations
1.
4.
2.
5.
3.
7. Using what you have learned in this section, refer back to the Science Focus from 5.1 (sea otters). Why
are sea otters making a slow comeback? How is your answer impacting the ecosystem of the kelp
forest?
8. Using the diagram below, why might the population of moose overshoot its carrying capacity?
a. Identify and describe one reason
the population crashes around 1860?
A
9. Fill in the following chart
Characteristic
r-Selected Species
Example of a representative species
Number and size of offspring
Parental Care Provided
Age of reproductive maturity (early or
late)
Survival rate of offspring
General Size of adults
Growth rate (r) (high or low)
Population size in relation to carrying
capacity
Niche (specialist or generalist)
Ability to compete (high or low)
Common during which stage of
succession (early or late succession
species)
See handout for survivorship curves
10. Define the following vocabulary words
a. Genetic drift
b. Inbreeding
c. Minimum viable population size
d. Founder effect & an example of the founder effect in nature
e. Demographic bottleneck & an example of the bottleneck effect
K-selected Species
11. Identify 4 density-dependent population controls.
12. Define the following types of population curves and provide one graphic representation illustrating each.
a. Stable
b. Irruptive
c. Cyclic
d. Irregular
5-4 How Do Communities and Ecosystems Respond to Changing Environmental Conditions?
1. Compare and contrast primary and secondary succession. In your comparison, include a drawing &
examples of plant species that colonize at each stage.