3/16 daily Catalyst Pg. 31 OH Deer! Lab 1. List the four limiting factors that influence carrying capacity. 2. what is the more realistic growth curves we see in populations? 3. Identify the carrying capacity of this environment.

3/16 Class Business Pg. 31 OH Deer! Lab Ecology test on Friday Study guide due test day Review day on Thursday Visual aid work time on Wednesday Good luck on the ACT tomorrow and happy St. Patrick’s Day!

3/16 Agenda Pg. 31 OH Deer! Lab Daily Catalyst Class Business Review Oh Deer Lab prep Outside Lab Lab conclusion

Review Define ECOLOGY: An organisms interaction with its environment Define ECOSYSTEM: The living and the non living interacting with one another Living= biotic Plants, humans, bacteria, animals, trees, flowers Non living= abiotic Rocks, soil, water, sun, oxygen, nitrogen, CO2, dirt, mud

Review The 4 properties of populations: 1. Size 2. Density The number in the population 2. Density How many in an area 3. Dispersion How populations space themselves in an area 4. Age diagrams How many are a certain age

Dispersion

Growth models Exponential Logistical Nickname: J-Curve Unregulated growth and unlimited resources Sustainable? Nickname: S-Curve Effected by limited resources Population Stabilize

Age Diagrams The different colored bars will represent different age groups and the length of the bars represent the amount of people in that age groups.

Review Do all organisms have an equal chance of surviving? NO! Survivorship curves!

Survivorship Curves Type I: Type II: Type III: High survival rate in young Effective parenting Overall low death rates Type II: Constant death rate Limited parenting Type III: High death rate in young No parenting A lot of offspring because so many die Once survive till a certain age, high survival rate

Match the curves to the populations Type I Type 2 Type 3

Carrying Capacity Limiting factors affect the carrying capacity 1. Water 2. Food 3. Shelter/space 4. Competition Food, water, space, competition

A more realistic image If I only showed you the exposed graph, most of you would say this is exponential growth. So far, you are correct. In the beginning, we see early rapid growth. Click box. Eventually the population growth will start to slow down as resources become limited. The population growth will stabilize. Now this looks like a logistical curve.

Graph’s predict birth and death rates When the population is below its carrying capacity, there is room to grow so this is point B. When the population is above its CC, the population will decrease, point D. The population wants to be at its carrying capacity.

Lab What are we doing today?? Students will be able to collect and graph data, recognize models and their limits, and design their own model for an original experiment. Objective: The student is able to make models and make scientific claims and or predictions about the effects of variation within populations on survival and fitness.  

Title: Oh Deer Lab Materials: People Pen/pencil Data table Graph paper

Procedure: Every student will play a deer or a resource. The resources will be food, water, and shelter. They will act out the hand signals during the game. The deer will also have a particular resource they are looking for. They will run from one side of the field to the resources BEFORE other deer reach their resource. If you do not reach your resource, you are dead

Data Collection Mrs. Ireland will collect the data in a data table then she will share the data with you following the lab. We will then make a line graph of this information!

Data Collection # or rounds Deer at the beginning Deer at the end 1 2 3 4 5 6 7 8

Data Analysis 1. What trends do you notice in your graph? Answer the following questions on page 31 in your notebook. 1. What trends do you notice in your graph? 2. It’s important to keep in mind that this is a model and models have limits. With respect to the natural world, what is this model really good at representing? What does this model fail to take into account? 3. What is one way you could alter this model to better represent a specific condition or event? 4. What in the game represented carrying capacity?