1. Unit 2: Ecology Lesson #3: Sampling Techniques
Objective: Explain how ecologists use mark and recapture to estimate population size.
Please take out your composition notebook
“No Bags About It”

2. DUE NOW… Please turn to page

3. Sampling Techniques Notes Ecologists study relationships

4. Ecological research methods include observation, and experimentation.
Observation is the act of carefully watching something over time.

5. Experiments
Lab Experiments: more control, but are not reflective of the complex interactions in nature.
Field experiments: more accurate, but cannot be manipulated to test certain variables.

6. Sampling Techniques
Mark-and-Recapture
Used to estimate the size of a population.
Capturing individuals, tag, release.
Can be captured again.

7. Quadrat Sampling:
Place a quadrat in an area
Count the population several areas, then calculate the total population.

8. Video Questions Why/how are quadrats useful?
What are the different types of quadrats used for sampling?
How are quadrats placed in an area?

10. In your notebook Pg 400 answer questions 2 and 3
Pg. 401 read “Quadrats and Population Size”
Answer questions 1 and 2 in your notebook.
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