The Carrying Capacity of an Environment. Part 1: The Meaning & Predicting What do you think the following words mean? Carrying Capacity: Exponential.

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Presentation transcript:

The Carrying Capacity of an Environment

Part 1: The Meaning & Predicting What do you think the following words mean? *Carrying Capacity: *Exponential Growth to Carrying Capacity: Discuss at your tables & be ready to report out!

Part 1: The Meaning & Predicting Our thoughts: Carrying Capacity: Exponential Growth to Carrying Capacity:

Part 1: The Meaning & Predicting Carrying Capacity: the number of organisms that can be supported by an area (how many living things can live somewhere and have their needs met) Exponential Growth to Carrying Capacity: the doubling of a population until it reaches the total number that can survive in the area

Part 2: The Math Sketch the shape of a exponential growth to carrying capacity graph: Use your definitions!!!! Use your prior knowledge!!!! Use your math knowledge!!!! Use your notes!!!!

Adjust your sketch! Exponential Growth to Carrying Capacity Graph : HOW DO YOU KNOW THIS GRAPH IS ACCURATE? “J curve”! (represents exponential growth) The population growth becomes steady at the capacity that can survive! (the # or organisms stays the same now)

R ATE YOUR LEARNING ! Use the generic scale: 0 = I’m don’t get this at all! 1 = I get some of it 2 = I get most of it 3 = I totally get this! 4 = I can help teach someone else this! Now, talk at your tables about your learning. Can you help someone there? Do you need help from someone there? Be ready to chat with your teacher!

Part 3: More Detail Exponential Growth to Carrying Capacity With Population Crash: Your thoughts??

Part 3: More Detail Exponential Growth to Carrying Capacity With Population Crash: the doubling of a population (exponential growth) until it reaches the total number that can survive in the area followed (carrying capacity) by a dramatic drop in population size (population crash) that occurs when a population exceeds its carrying capacity.

Part 4: The Math Sketch the shape of a exponential growth to carrying capacity with population crash graph: Use your definitions!!!! Use your prior knowledge!!!! Use your math knowledge!!!! Use your notes!!!!

Adjust your sketch! Exponential Growth to Carrying Capacity with Population Crash Graph : HOW DO YOU KNOW THIS GRAPH IS ACCURATE? “J curve”! (exponential growth) The population growth becomes steady at the capacity that can survive! (the # of organisms stays the same) The dramatic drop in the population size! (exceed carrying capacity so a bunch die)

R ATE YOUR LEARNING ! Use the generic scale: 0 = I’m don’t get this at all! 1 = I get some of it 2 = I get most of it 3 = I totally get this! 4 = I can help teach someone else this! Now, talk at your tables about your learning. Can you help someone there? Do you need help from someone there? Be ready to chat with your teacher!

Actual Situation: In 1944, 29 reindeer were brought to St. Matthew Island, an uninhabited island off the coast of Alaska. Initially there were abundant food sources, and the reindeer population increased dramatically. There were no predators to cull the population. About 20 years after they were first introduced, the reindeer had overshot the food carrying capacity of the island, and there was a sudden, massive die- off. About 99% of the reindeer died of starvation.