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Monday Oct 13th-Week 10
Science of Life
TOPIC: Population Dynamics
 OBJ : 3-5
DO NOW: What advantage do smaller fish gain by forming clumped
groups, or schools?
EXT: Oh DEER!
DUE DATE: Oct 14th
DW: 4.1 Application Notes
-----------------------------------------------------------------------------------------------------------------Check weekend work
-Go Over 4.1 Application notes
ABSENT
AGENDA
HANDOUTS to PICK-UP:
TURN IN to ABS box:
SEMINAR 2:
BEFORE/AFTER SCHOOL:
DW-4.2 Book Pages/notes/vocab
EXIT: Fill in your level of understanding AND provide a summary of what you
learned in class today.
MONDAY
MONDAY: ___10__/__13___
OBJECTIVE…#_3-5_____
TOPIC:
Population Dynamics
Daily Work Grade- 4.2 Book Pages/4.2 Vocab
DW GRADE:
2 1 0
DO NOW
Q:What advantage do smaller fish gain by
forming clumped groups, or schools?
A: Schooling behavior
confuses predators and
provides additional safety
for individuals within the
center of the school.
UNIT OBJECTIVES
3---EXPLAIN the differences between population size, density, and dispersion.
4---SPECULATE how the rate of change in populations is determined by the combined effects
of birth, death, emigration, and immigration.
5---COMPARE & CONTRAST both exponential & logistical models of population growth.
Vocabulary
 population density
 dispersion
 density-independent factor
 density-dependent factor
 population growth rate
 emigration
 immigration
 carrying capacity
 k-strategist
 r-strategist
These should be
done by test day!
GROUP WORK: GUIDED NOTES
-As a GROUP complete the guided note using your
knowledge from the reading.
4.1 POPULATION DYNAMICS
WHAT YOU WILL LEARN
-concepts of carrying capacity & limiting factors
-ways in which populations are distributed
MAIN IDEA:
MAIN
IDEA
populations of species are described by:
-density
-spatial distribution
-range
-growth rate
REVIEW
REVIEWVOCABULARY
VOCABULARY
population-group of SAME species/SAME place/SAME time
POPULATION
CHARACTERISTICS
POPULATION
CHARACTERISTICS
-COMPARE the terms by defining & giving examples
population density# of individuals per area
Habitat area= 4km2
31 individuals [bison]
DENSITY = 7.75 indv per area km2
spatial distribution (dispersion)spacing of
organisms
population range-area where an organism lives & reproduces
2 different types
-limited to small or large areas
-affected by abiotic & biotic factors
Clumped,
random,
uniform
POPULATION
FACTOR
POPULATIONLIMITING
CHARACTERISTICS
IDENTIFY each pattern of dispersion represented
NOTE characteristics of each
random
-unpredictable
spacing
-seeds blown in
wind
uniform
-compete for
resources
-social
interactions
clumped
-distribution
of nutrients
-social
-mating
POPULATION
FACTOR
POPULATIONLIMITING
LIMITING FACTOR
-COMPARE the terms by defining & giving examples
carrying capacity-max # of individuals an environment can support for
LIMITED by the energy, water, nutrients available
long term
limiting factorEX- food supply
-restricts the # of organisms in an area
density-independent factor-
ABIOTIC—
does NOT depend on # of ind in
population
-extreme weather, pollution
density-dependent factor-
BIOTIC—
DOES depend on # of ind in
population
-predation, disease, competition
POPULATION
FACTOR
POPULATIONLIMITING
LIMITING FACTOR
-CLASSIFY each limiting factor
FACTOR
biotic or abiotic
Lava flow
Stand-UP
DENSITYINDEPENDENT
ABIOTIC
Extremely cold winter
X
Toxic chemical spill into a stream
X
Fungus that attacks elm trees
BIOTIC
X
X
Spread of disease
Flooding due to hurricane
DENSITYDEPENDENT
X
Change in number of predators
Intense competition for food source
Sit-DOWN
X
X
X
POPULATION
LIMITING FACTOR
-COMPARE factors in a population’s growth rate
Population growth rate-rate in which individuals are added or removed from a
population
emigrationimmigration-individuals leave-EXIT (-)
-individuals move INTO (+)
mortalityIndividuals die (-)
natalityIndividuals born (+)
Think and Answer: 1
PREDICT how the cycle might change for the moose population if the wolves were
removed from Isle Royale.
POPULATION
FACTOR
POPULATIONLIMITING
LIMITING FACTORS
DRAW graphs:
Exponential Population Growth
Logistic Population Growth
exponential
growth
carrying
capacity
lag phase
population growth w/o
limiting factors—
continues to grow
population growth w/limiting
factors—stops growing when
reaches carrying capacity
POPULATION
LIMITING FACTOR
carrying capacity
EXPONENTIAL GROWTH:
• Starts with lag phase
• NO limiting factors
• NO carrying capacity
• J-curve
LOGISTIC GROWTH
• Starts with lag phase
• Limiting factors
• Carrying capacity
• S-curve
POPULATIONLIMITING
LIMITING FACTOR
POPULATION
FACTOR
SUMMARIZE the reproductive strategies of r-strategists & kstrategists for ensuring continuation of their species.
CHARACTERISTIC
size
# of births per cycle
R-strategist
SMALL
many offspring
Life span
SHORT life span
amount of energy put into raising
their young
little amount of
energy
type of environment
abundant resources
K-strategist
LARGE
1 or few
offspring
LONG life span
lot of energy raising
young
equilibrium at
carrying capacity
POPULATION
FACTOR
POPULATIONLIMITING
LIMITING FACTORS
IDENTIFY the following organisms reproductive patterns
R
K
R
R-strategist / K-strategist
R
CONCEPT
MAP:
POPULATION
LIMITING
FACTOR
growth
rate
dispersion
density
limiting factors
uniform
clumped
densityindependent
densitydependent
ABIOTIC
drought
BIOTIC
predation
competition
Review Questions
• What are three characteristics used to describe populations?
-Spatial distribution
-population density
-growth rate
Review Questions
• What is the difference between uniform and random distribution?
-Uniform distribution appears equally spaced, and random
distributions can have organisms closely spaced in some areas and
more distantly spaced in others
Review Questions
• How would you classify a biotic factor, such as food
availability that limits its population size?
-it would be a density-dependent factor
Review Questions
• How would you distinguish between the shape of an
exponential growth curve and a logistic growth curve?
-Exponential growth curves are J-shaped and logistic growth
curves are S-shaped
Review Questions
• Can you describe what is happening to a population in the
exponential phase of growth?
-It is growing rapidly
EXIT
FILL-IN: level of understanding of today’s objective

EXIT: Provide a summary of what you learned today.
(17 word minimum)