8-1 how populations change in size
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8-1 How Populations Change in Size. Page 197. A. What is a population?. 1. Set of individuals within a species living in the same place at the same time. How many populations are in this picture?. B. Properties of Populations. - PowerPoint PPT PresentationTRANSCRIPT
8-1 How Populations Change in Size
Page 197
A. What is a population?• 1. Set of individuals within a species living in
the same place at the same time.
How many populations are in this picture?
B. Properties of Populations
• 1. Density is the number of individuals per unit area or volume.
B. Properties of Populations
• 2. Dispersion describes arrangement of individuals in a population; can be even, clumped, or random.
even, clumped, or random?
C. How Does a Population Grow?
• 1. Populations gain individuals with each birth, and lose individuals with each death.
C. How Does a Population Grow?
• 2. The % change in a population is the growth rate.
• Change in Population Size= Births- Deaths
Change in Population Size= Births- Deaths
Births Deaths Change in Population Size
5 55535 7682345 8765
D. How fast can a population grow?
• 1. The reproductive potential of a population determines the maximum # of offspring that each member can produce.
D. How fast can a population grow?
• 2. If a population experiences exponential growth, it will grow faster and faster.
E. What Limits Population Growth?
• 1. Carrying Capacity is the population size where birth and death rates are equal.
What type of growth? (Graph the Data)
Days (X) Consumption (Y)
1 102 103 204 305 40
What type of growth? (Graph the Data)
Days (X) Consumption (Y)
1 102 203 304 305 20