10/26 Human Population Dynamics

The current world population is estimated to be over 7 billion. At present, the number of births annually exceeds the number of deaths, which means that the population is increasing, and is estimated to reach
9 billion by 2040. In 1750 the world population was estimated at less than 800 million. How are growing populations such as ours controlled and supported, and can they continue to grow indefinitely?

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What is the term used for populations moving into an area?

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What is the term used for populations leaving an area?

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Name two factors that cause an increase in the population size.

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Name two factors that cause a decrease in population size.

Using the model above and the letters B, D, E, and I, write mathematical expressions to show the types
of population described below. Note: The use of = and  > and < may be needed.

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A stable population (total number of organisms is not changing).

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A declining population (total number of organisms is decreasing).

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A growing population (total number of organisms is increasing).

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There are 4 million people living in Los Angeles. The area of Los Angeles is 400,000 square kilometers. What is the population density of Los Angeles?

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The area of Chicago is 200,000 square kilometers. The population density is 100 people per square kilometer. What is the population of Chicago?

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There are 300 births in a mountain lion population in 2009. In 2010, there were 400 births in the same mountain lion population. What is the rate of change of the birth rate for the mountain lion population?
(Percent change = ((Population in Yr2 – Population Yr1) /Pop in Yr 1) x 100))

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In 2012, there were 20 deaths of vampire bats in Costa Rica. In 2011, there were only 10. What is the percent change of the death rate?
(Percent change = ((Population in Yr2 – Population Yr1) /Pop in Yr 1) x 100))

Look at the data below and calculate the growth rates for the California Quail for each year. The total population size is 1000 individuals.

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Calculate the growth rate for Year 1. ((B+I)-(D+E))/1000

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Calculate the growth rate for Year 2. ((B+I)-(D+E))/1000

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Calculate the growth rate for Year 3.

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Calculate the growth rate for Year 4.

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Describe the overall trend in population size in the California Quail population from year 1 to 4.

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California will double its population size in how many years with a present growth rate of 2%?

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India is doubling its population every 15 years. What is the growth rate of India?

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The country of Togo in Western Africa has a growth rate of 4 %, its present population is 5 million. How long will it take for Togo to double its population?

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In 2000, the population of Snowy Egrets went from 5000 individuals to 15,000 individuals. What is the growth rate of change over those 4 years?
(Percent change = ((Population in Yr2 – Population Yr1) /Pop in Yr 1) x 100))

What is the term used for populations moving into an area?

What is the term used for populations leaving an area?

Name two factors that cause an increase in the population size.

Name two factors that cause a decrease in population size.

A stable population (total number of organisms is not changing).

A declining population (total number of organisms is decreasing).

A growing population (total number of organisms is increasing).

There are 4 million people living in Los Angeles. The area of Los Angeles is 400,000 square kilometers. What is the population density of Los Angeles?

The area of Chicago is 200,000 square kilometers. The population density is 100 people per square kilometer. What is the population of Chicago?

There are 300 births in a mountain lion population in 2009. In 2010, there were 400 births in the same mountain lion population. What is the rate of change of the birth rate for the mountain lion population? (Percent change = ((Population in Yr2 – Population Yr1) /Pop in Yr 1) x 100))

In 2012, there were 20 deaths of vampire bats in Costa Rica. In 2011, there were only 10. What is the percent change of the death rate?(Percent change = ((Population in Yr2 – Population Yr1) /Pop in Yr 1) x 100))

Calculate the growth rate for Year 1. ((B+I)-(D+E))/1000

Calculate the growth rate for Year 2. ((B+I)-(D+E))/1000

Calculate the growth rate for Year 3.

Calculate the growth rate for Year 4.

Describe the overall trend in population size in the California Quail population from year 1 to 4.

California will double its population size in how many years with a present growth rate of 2%?

India is doubling its population every 15 years. What is the growth rate of India?

The country of Togo in Western Africa has a growth rate of 4 %, its present population is 5 million. How long will it take for Togo to double its population?

In 2000, the population of Snowy Egrets went from 5000 individuals to 15,000 individuals. What is the growth rate of change over those 4 years?(Percent change = ((Population in Yr2 – Population Yr1) /Pop in Yr 1) x 100))

There are 300 births in a mountain lion population in 2009. In 2010, there were 400 births in the same mountain lion population. What is the rate of change of the birth rate for the mountain lion population?
(Percent change = ((Population in Yr2 – Population Yr1) /Pop in Yr 1) x 100))

In 2012, there were 20 deaths of vampire bats in Costa Rica. In 2011, there were only 10. What is the percent change of the death rate?
(Percent change = ((Population in Yr2 – Population Yr1) /Pop in Yr 1) x 100))

In 2000, the population of Snowy Egrets went from 5000 individuals to 15,000 individuals. What is the growth rate of change over those 4 years?
(Percent change = ((Population in Yr2 – Population Yr1) /Pop in Yr 1) x 100))