Monday Oct 13th-Week 10TOPIC: Population Dynamics OBJ : 3-5
DO NOW:
EXT: Oh DEER! DUE DATE: Oct 14th
DW: 4.1 Application Notes
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EXIT: Fill in your level of understanding AND provide a summary of what you learned in class today.
HANDOUTS to PICK-UP:
TURN IN to ABS box:
SEMINAR 2:
BEFORE/AFTER SCHOOL:DW-4.2 Book Pages/notes/vocab
-Check weekend work-Go Over 4.1 Application notes
What advantage do smaller fish gain by forming clumped groups, or schools?
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Science of Life
MONDAY: ___10__/__13___ OBJECTIVE…#_3-5_____ TOPIC:
Population Dynamics
Daily Work Grade- 4.2 Book Pages/4.2 Vocab
DW GRADE: 2 1 0
MONDAYDO 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.
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.
UNIT OBJECTIVES
Add on to each QUESTION every night as REVIEW!
Vocabulary
These should be
done by test day!
population density dispersion density-independent factor density-dependent factor population growth rate emigration immigration carrying capacity k-strategist r-strategist
GROUP WORK: GUIDED NOTES-As a GROUP complete the guided note using your knowledge from the reading.
4.1 POPULATION DYNAMICSWHAT YOU WILL LEARN-concepts of carrying capacity & limiting factors
-ways in which populations are distributed
MAIN IDEA:populations of species are described by: -density -spatial distribution -range -growth rate
MAIN IDEA
REVIEW VOCABULARYpopulation--group of SAME species/SAME place/SAME time
REVIEW VOCABULARY
POPULATION CHARACTERISTICS-COMPARE the terms by defining & giving examples
spacing of organisms
# of individuals per area
-area where an organism lives & reproduces
population density- spatial distribution (dispersion)-
population range-
Habitat area= 4km231 individuals [bison]DENSITY = 7.75 indv per area km2
2 different types-limited to small or large areas-affected by abiotic & biotic factors
POPULATION CHARACTERISTICS
Clumped, random, uniform
POPULATION CHARACTERISTICSIDENTIFY each pattern of dispersion representedNOTE characteristics of each
random-unpredictable spacing-seeds blown in wind
uniform-compete for resources-social interactions
clumped-distribution of nutrients-social-mating
POPULATION LIMITING FACTOR
POPULATION LIMITING FACTOR-COMPARE the terms by defining & giving examples
-restricts the # of organisms in an area
ABIOTIC—does NOT depend on # of ind in population-extreme weather, pollution
-max # of individuals an environment can support for long term
carrying capacity-
limiting factor-
density-independent factor-
density-dependent factor-BIOTIC—DOES depend on # of ind in population-predation, disease, competition
LIMITED by the energy, water, nutrients available
EX- food supply
POPULATION LIMITING FACTOR
POPULATION LIMITING FACTOR-CLASSIFY each limiting factor
FACTORbiotic or abiotic
DENSITY-INDEPENDENT
DENSITY-DEPENDENT
Lava flow
Change in number of predators
Spread of disease
Extremely cold winter
Toxic chemical spill into a stream
Intense competition for food sourceFlooding due to hurricane
Fungus that attacks elm trees
ABIOTIC
XX
X
XX
X
XX
BIOTIC
Stand-UP Sit-DOWN
POPULATION LIMITING FACTOR
Population growth rate-
emigration- immigration-
mortality- natality-
POPULATION LIMITING FACTOR-COMPARE factors in a population’s growth rate
-individuals leave-EXIT (-)
Individuals die (-)
-rate in which individuals are added or removed from a population
Individuals born (+)
-individuals move INTO (+)
Think and Answer: 1PREDICT how the cycle might change for the moose population if the wolves were removed from Isle Royale.
POPULATION LIMITING FACTORSDRAW graphs:
lag phase
exponential growth
carrying capacity
Exponential Population Growth Logistic Population Growth
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
POPULATION LIMITING FACTOR
CHARACTERISTIC R-strategist K-strategist
size
# of births per cycle
Life span
amount of energy put into raising their young
type of environment
SUMMARIZE the reproductive strategies of r-strategists & k-strategists for ensuring continuation of their species.
many offspring
LARGE
equilibrium at carrying capacityabundant
resources
LONG life span
SMALL
SHORT life span
little amount of energy
1 or few offspring
lot of energy raising young
POPULATION LIMITING FACTORPOPULATION LIMITING FACTOR
POPULATION LIMITING FACTORSIDENTIFY the following organisms reproductive patterns
R K R R
R-strategist / K-strategist
POPULATION LIMITING FACTOR
density-independent
clumped
predation
uniformlimiting factors
growth rate
drought
density
dispersion
ABIOTIC
CONCEPT MAP:
BIOTIC
density-dependent
competition
POPULATION LIMITING FACTOR
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
EXITFILL-IN: level of understanding of today’s objective
EXIT: Provide a summary of what you learned today. (17 word minimum)
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