C ONCEPT 3: P OPULATION E COLOGY – A NALYZING DENSITY, DISPERSION, DEMOGRAPHICS, GROWTH, AND FACTORS THAT AFFECT GROWTH. Chapter 53 in Campbell p in Holtzclaw, Qs #3, 21, 22, 23 p. 304

P OPULATION E COLOGY You 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

TRY THIS! What kind of distribution does the following represent?

TRY THIS! What kind of distribution does the following represent? CLUMPING

WORKSHEET: ACT “52.1” Any Questions? Let’s go over...

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

TRY THIS! Describe the Canadian human population in terms of density, dispersion, and demographics...

TRY THIS! Describe the Canadian human population in terms of density, dispersion, and demographics... Overall low density Clumped Dispersion Type I Survivorship

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?

WHAT ARE THE DIFFERENCES BETWEEN EXPONENTIAL AND LOGISTIC GROWTH MODELS OF POPULATION GROWTH? Exponential Growth Model

WHAT ARE THE DIFFERENCES BETWEEN EXPONENTIAL AND LOGISTIC GROWTH MODELS OF POPULATION GROWTH? Logistic Growth Model K=carrying capacity

WHAT ARE THE DIFFERENCES BETWEEN EXPONENTIAL AND LOGISTIC GROWTH MODELS OF POPULATION GROWTH? What type of growth model does this Daphnia show?

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

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

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

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?

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

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)