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CONCEPT 3: POPULATION ECOLOGY – ANALYZING DENSITY, DISPERSION, DEMOGRAPHICS, GROWTH, AND FACTORS THAT AFFECT GROWTH.Chapter 53 in Campbellp. 294-297 in Holtzclaw, Qs #3, 21, 22, 23 p. 304
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POPULATION ECOLOGYYou must know: How density, dispersion, and demographics
can describe a population The differences between exponential and
logistic growth models of population growth How density-dependent and density-
independent factors can control population growth
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TRY THIS! What kind of distribution does the following
represent?
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TRY THIS! What kind of distribution does the following
represent? CLUMPING
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WORKSHEET: ACT “52.1” Any Questions?
Let’s go over...
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HOW CAN DENSITY, DISPERSION, AND DEMOGRAPHICS CAN DESCRIBE A POPULATION? Population Density Dispersion
Clumped Uniform Random
Demography Type I survivorship Type II survivorship Type III survivorship Demographic transition
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TRY THIS! Describe the Canadian human population in
terms of density, dispersion, and demographics...
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TRY THIS! Describe the Canadian human population in
terms of density, dispersion, and demographics...
Overall low density Clumped Dispersion Type I Survivorship
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WHAT ARE THE DIFFERENCES BETWEEN EXPONENTIAL AND LOGISTIC GROWTH MODELS OF POPULATION GROWTH? Life History
Age of reproduction Frequency of
reproduction Number of offspring
per reproduction
How do the life histories of the dandelion and the coconut palm compare?
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WHAT ARE THE DIFFERENCES BETWEEN EXPONENTIAL AND LOGISTIC GROWTH MODELS OF POPULATION GROWTH? Exponential Growth Model
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WHAT ARE THE DIFFERENCES BETWEEN EXPONENTIAL AND LOGISTIC GROWTH MODELS OF POPULATION GROWTH? Logistic Growth Model
K=carrying capacity
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WHAT ARE THE DIFFERENCES BETWEEN EXPONENTIAL AND LOGISTIC GROWTH MODELS OF POPULATION GROWTH? What type of growth model does this
Daphnia show?
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WHAT ARE THE DIFFERENCES BETWEEN EXPONENTIAL AND LOGISTIC GROWTH MODELS OF POPULATION GROWTH? r-selection – density
independent selection vs
K-selection – density dependent selection
Density dependent factors include” Competition Territoriality Disease predation
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TRY THIS!1) Which of the following best describes
opportunistic, or r-strategy, organisms?
(a) They reach sexual maturity rapidly(b) They reach their adult size slowly(c) They attain a large body size(d) They live for a long time(e) The size of their population remains fairly constant
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TRY THIS!1) Which of the following best describes
opportunistic, or r-strategy, organisms?
(a) They reach sexual maturity rapidly(b) They reach their adult size slowly(c) They attain a large body size(d) They live for a long time(e) The size of their population remains fairly constant
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TRY THIS!a)What is the type of
growth from 1-7 days?
b) What does the dashed line represent?
c) After 9 days, is the population regulated by density dependant or independent factors?
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TRY THIS!a)What is the type of
growth from 1-7 days?Exponential
b) What does the dashed line represent?Carrying capacity (K)
c) After 9 days, is the population regulated by density dependant or independent factors?Density dependent
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NOW… Do questions #3, 21, 22, 23 p. 304 in
Holtzclaw Answer the AP free response question
(handed out in class) on a separate piece of paper – DUE next class We will be peer assessing your answers, you
MUST bring it to class! Checkpoint next class covering Concept 2
(Biomes) and Concept 3 (Population Ecology)