University:
Kentucky State University
Course:
BIO 301 | Human Anatomy
Academic year:

2024
Views:

285

Pages:

2
Author:

gartelpabv

Population Dynamics Exercise 2024 Name: ______________________________________ The difference between birth and death rates determines the growth rate. These rates are expressed as the number of births or deaths per 1000 people per year. For example, in 1991 the world’s birth rate was 27 per 1000 and the death rate was 9 per 1000. Using the formulas in your text, you can determine the world’s annual growth rate and doubling time based on the growth during 1991. Percent annual increase = (birth rate - death rate) = 27 - 9 = 1.8% 10 10 Doubling time = 70 rate of increase = 70 = 39 years 1.8% 1. Calculate the percent annual increase and the population doubling time for each country based on 1991 data. Country Birth rate 1991 Death rate 1991 United States 17 9 Mexico 29 6 Japan 10 7 United Kingdom 14 12 China 21 7 India 31 10 Kenya 46 7 USSR 18 10 South Africa 35 8 Italy 10 9 Denmark 12 12 Australia 15 7 Growth rate doubling time 2. In 2023 the world’s birth rate was 17 per 1000 and the death rate was 8 per 1000. Calculate the growth rate and the doubling time. 3. Historically, the highest growth rate for the human population was 2.1%, reached in the mid 1960’s. Calculate the doubling time for the human population at this growth rate. 4. Based on the information you have so far what can you conclude about the world population growth rate over the last 60 years? Population Dynamics Exercise 2024 5. Direct comparisons to the 1991 data are difficult because of the political changes that have occurred since 1991, but fill in the chart below based on the most current data Country Birth rate 2023 Death rate 2023 United States 11 10 Mexico 15 9 Japan 6 13 United Kingdom 10 10 China 7 7 India 18 8 Kenya 28 8 Ukraine 8 21 Poland 8 11 Romania 9 18 Russia 9 14 South Africa 20 11 Italy 7 12 Denmark 10 10 Australia 11 7 growth rate (%) doubling time (years) 6. Which differs most from country to country, the birth rates or the death rates? What are some reasons for this? 7. Which countries have reached Zero Population Growth? 8. Which countries are experiencing a decrease in population? Why might this be occurring? Why might a decreasing population be considered a problem in these countries? 9. In 1991, the population growth of the U.S. was actually about 1.3%, significantly higher than the .8% rate that you calculated based on the birth and death rates. Where is the additional population coming from? What are some factors that have led to the changes in our population growth rate over the past 22 years? 10. Knowing this information, how can we adjust the formula for calculating the growth rate of a specific country to be more accurate?