Transcript Catalyst 8/15/2011

Catalyst 9/6/2011
Take out your Class notes summary and Vocab Words
1) What are some of the characteristics of r-selected species?
• 2) What are some of the characteristics of k-selected species?
• 3) Using what you know about density dependent vs. density
independent, explain why the city is a bad place to be during a zombie
outbreak
• HW
2) Summarize Class Notes
3) Create Vocab Cards for New Vocabulary
Agenda 9/6/2011
• Catalyst (15 mins)
• Finish Worksheets and Update Notebook (20 mins)
• Notebook Quiz (20 mins)
• Grade Quiz 1 Unit 1 (10 mins)
• Population Cycles Notes (20 mins)
• Independent Work (20 mins)
• Population Cycles Exit Slip (15 mins)
Finish Worksheets and Update
Notebook
• You have 20 minutes to finish worksheets and update your
notebooks
The Importance of Grass
• 1) How is the grass important to the three animals described
in the video?
• 2) What would happen to the populations of species if the
grass growth was slow and not plentiful?
• 3) What would happen to the populations of species if the
grass growth was fast and plentiful?
Boom- and- Bust Cycle
• The boom-and-bust cycle is very common among r-selected
organisms. There is a rapid increase in the population and
then equally rapid drop off.
• Changes may be linked to predictable cycles in the
environment
• Good Conditions: Population Increase
• Bad Conditions: Population Decrease
Boom- and- Bust Cycle
Boom-Bust Cycle
Population
Time (in years)
Predator – Prey Cycle
• As prey population decline, predator populations decline
• As prey population increase, predator populations increase
• Predator Populations will increase only after prey populations
known as lag- time as they need time to reproduce.
Predator – Prey Cycle
Predator – Prey Cycle
Population
Time (in years)