1. Interpreting Ecological Data

2. Exponential and logistic growth graphs

3. 1.This graph shows _________ growth curve. 2.The carrying capacity for yeast cells is _________. 3.At what times did the yeast cells experience exponential growth?

4. 1.Above is an example of a __________ growth curve. 2.What is the carrying capacity for humans?

5. Mark & Recapture Table YearSquirrels TrappedNumber with Mark 2009153 2010105 2011207 In 2008, Mr. Crumbley marked 10 squirrels and then released them back into his backyard. Over a 4 year period, squirrels were trapped and their numbers recorded. Formula: (Total number captured) x (original number marked) / (total number recaptured with mark)

6. What is the estimated squirrel population size in Mr. Crumbley’s backyard? (45)x(10) / (15) = – 450/15 = 30

7. Sampling What if you wanted to count rabbits over 100 acres of land? One way, you can count the rabbits in one acre of land and multiply by a 100 to estimate the population size.

8. Sampling Practice How would you estimate the population size of lizards for a 50 acre area of land? If you counted 5 lizards on one acre of land?

9. Calculating rate of growth Year# of hawks# of snakes born# of snakes died 20001153 20024117 2004869 20064103 1.During which year was the snake population at zero growth? 2.During which year did the snake population grow the most? 3.What is the carrying capacity for hawks? 4.What is the carrying capacity for snakes?