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.

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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 intrinsic rate of increase (r) Environmental Resistance carrying capacity (K) Exponential Growth J-Curve Logistic Growth S- Curve Overshoot and Collapse Overshoot and Collapse Graph Reproductive Time Lag

Vocabulary Charades J - Curve

Vocabulary Charades Overshoot and Collapse

Vocabulary Charades Natality

Vocabulary Charades Mortality

Vocabulary Charades Environmental Resistance

Vocabulary Charades Logistic Growth

Vocabulary Charades Biotic Potential Keep it PG Rated!