SBI4U – Gr. 12 Biology Univ. Prep. Mrs. S. Pandey Unit 5: Population Dynamics Name: _____________________________________ 14.2 – Factors Affecting Population Growth Use the notes in the class Livebinder (http://www.livebinders.com/edit/index/910789) to complete the following note. 1. What 4 main factors affect population numbers? 2. What is the equation for population change per capita? 3. 4 other factors that affect populations are listed below. Define each one. a) carrying capacity (pg 660 of textbook; pg 513 of pdf): b) open vs. closed populations: c) fecundity: d) biotic potential: 4.
What is growth rate, “r”? SBI4U – Gr. 12 Biology Univ. Prep. Mrs. S. Pandey 5. 3 models of population growth are shown in the table below. Fill in the missing information. Growth Model Definition Equation (label the terms) Geometric Growth Exponential Growth Logistic Growth Examples 6. Deer exhibit geometric growth. With an initial population of 1000 deer, there are 250 births, 100 deaths in a year. a) Calculate the geometric growth rate. b) Calculate the population in 3 years. c) Calculate the population in 10 years. SBI4U – Gr. 12 Biology Univ. Prep. Mrs. S. Pandey 7. Bacteria exhibit exponential growth with sufficient food & space. If you start with 100 bacteria and they have an exponential growth rate of 0.4 per hour, a) calculate the instantaneous rate. b) calculate the doubling time. c) how many bacteria will there be in 3 doubling times? 8. A population is growing continuously (logistic growth). The carrying capacity of the environment is 1000 individuals and its maximum growth rate, rmax, is 0.50. a) Determine the population growth rates based on a population size of 20, 200, 500, 900, 990 and 1000.* b) Describe the relationship between population size and growth rate.* *see pg. 667 in textbook for answers SBI4U – Gr. 12 Biology Univ. Prep. Mrs. S. Pandey 9. “When considering growth rate, you must consider non-­‐overlapping generations and overlapping generations.” Define non-­‐overlapping & overlapping generations. 10. Sketch graphs showing geometric growth, exponential growth & logistic growth. HOMEWORK Answer questions # 1 – 5 on page 670 of textbook (pg. 523 of PDF)