Catalyst 8/29/2011• Put out the vocab words and class notes to be

checked.

• 1) How are deathrate and birthrate measured?

• 2) Describe the idea of biotic potential. Rank the biotic potential of the following species from least to greatest: bears, termites, squirrels, humans, deer, tuna, bacteria

• HW: 1) Create Frayer Vocabulary Words for today’s vocabulary words

• 2) Summarize Cornell Notes taken in class

Agenda 8/29/2011• Catalyst (15 mins)

• Carrying Capacity and Pop Curves (55 mins)

• Independent work time (40 mins)

• Exit Slip: 10 mins

The Simpsons Pool• 1) What vocabulary words can we link when

the kids left from Lisa’s pool to Martin’s pool? Explain how you came to that conclusion.

• 2) Martin’s pool became very popular. What eventually happened to his pool? Why did it happen?

• 3) How could have Martin prevented the fate of his pool?

Carrying Capacity and Graphs

• Exploring Carrying Capacity Scenarios

Carrying Capacity and Graphs

• The title of these notes are “No Population Can Grow Indefinitely”

r• The intrinsic rate of increase (r) is the rate

at which the population of a species would grow if it had unlimited resources

• Resources: light, water, space, food

Carrying Capacity• There are always limits to population growth in

nature

• Environmental Resistance is the combination of all factors that act to limit the growth of a pop.

Carrying Capacity• Biotic Potential and Environmental Resistance

determine the carrying capacity (K).

• Carrying Capacity is the maximum population of a given species that a particular habitat can sustain without degrading

Growth Curves and Graph Types

• If a population has a constant birth rate through time and is never limited by food or disease it is experiencing Exponential Growth.

• This is portrayed with a J-Curve graph:

• Look at the board

Growth Curves and Graph Types

• Logistic Growth involves rapid exponential growth followed by a steady decrease in growth until the population levels off.

• This is portrayed with a S-Curve graph:

• Look at the board

Growth Curves and Graph Types

• Overshoot and Collapse involves rapid exponential growth followed by a dramatic decrease in population that can eventually lead to extinction

• This is portrayed with a Overshoot and Collapse graph:

• Look at the board

Growth Curves and Graph Types

• Reproductive Time Lag is the period needed for the birth rate to fall and the death rate to rise during a crash

Today’s Vocabulary

Vocabulary Charades

Vocabulary Charades

Vocabulary Charades

Vocabulary Charades

Vocabulary Charades

Vocabulary Charades

Vocabulary Charades