Chapter 6 Population Biology
Questions for Review
-
What caused the sudden
collapse of Atlantic cod populations?
-
Explain exponential and
arithmetic growth.
-
Given a growth rate of 3
percent per year, how long will it take for a population of 100,000
individuals to double? How long will it take to double when the
population reaches 10 million?
-
What is environmental
resistance? How does it affect populations?
-
What is the difference
between fertility and fecundity?
-
Describe the four major
types of survivorship patterns and explain what they show about the
role of the species in an ecosystem.
-
What are the main
interspecific population regulatory interactions? How do they work?
-
What is island
biogeography and why is it important in conservation biology?
-
Why does genetic
diversity tend to persist in large populations, but gradually drift
or shift in small populations?
-
Draw a diagram showing
gene flow between source and sink habitat in a metapopulation.
Explain.
Define:
Population
Equilibrium
Dynamic
equilibrium
Static
equilibrium
Oscillate
Exponential
growth or Geometric growth
Arithmetic
growth
J-curve
S-curve
Carrying
capacity
Doubling time
Rule of 70 (or
72)
Biotic
potential
Population
explosion
Population
dieback
Overshoot
Environmental
resistance
Habitat
Fecundity
Nesting sites
Mortality
Natality
Immigration
Emigration
Life
expectancy
Life span
Survivorship
curves
Population
momentum
Age structure
histograms
Density
dependent
Density
independent
External or
extrinsic factors
Internal or
intrinsic factors
Describe
exponential (geometric growth) patterns.
Describe
arithmetic growth patterns.
Describe a J-
curve.
Describe an
S-curve.
What causes a
growth curve to change from J- curve to S-curve?
What does
carrying capacity mean?
What factors
affect the carrying capacity?
Why are most
populations said to be in ‘dynamic equlibrium’?
How is
‘oscillate’ related to dynamic equilibrium?
What is
‘climax’.
How do you
calculate the ‘doubling time’ for a species?
What is the
rule of 70 or rule of 72?
How do you use
it to estimate the doubling time?
What is an
organisms biotic potential?
What causes a
population explosion?
What causes a
population dieback?
Why does a
population ‘overshoot’ its carrying capacity?
Why does the
population dieback and overshoot its carrying capacity?
How is the
carrying capacity determined?
When a species
enters a new habitat, what kind of growth would it have?
For how long a
period of time would it experience this growth?
What is
carrying capacity?
What is
environmental resistance?
What causes
environmental resistance?
List the
factors that lead to environmental resistance.
How is habitat
related to nesting sites?
What is
fecundity?
How is habitat
related to fecundity?
What is the
Malthusian growth strategy?
What is the
logistic growth strategy?
What is
mortality?
What is natality?
How does
immigration affect population size?
How does
emigration affect population size?
How does life
expectancy affect population size?
How does
emigration benefit a species?
How does
immigration benefit a species?
Compare and
contrast life expectancy and life span.
Compare and
contrast the 3 or 4 survivorship curves.
List some
examples of species that have each type of survivorship curve.
What is
population momentum?
How is
population momentum related to carrying capacity, j-curve or s-curve,
and environmental resistance?
Describe the 3
shapes of Population Age-structure Histograms.
What does each
‘shape’ mean?
Compare and
contrast Density Dependent with Density Independent.
How are these
related to abiotic and biotic factors?
List some
density dependent and density independent factors and whether each is
abiotic or biotic.
How do
external (extrinsic) or internal (intrinsic) factors affect organisms?
Where on the
food chain are most affected by each type?
Lecture Slides
