1. Unit 2: Ecology Lesson #4: Core Sampling
Objective: Describe how Ecologists use core sampling to infer past environments
Please take out your composition notebook
“No Bags About It”

2. Core Sampling: A “core,” or drilled out section, of material is collected for study

3. Core Sampling: A “core,” or drilled out section, of material is collected for study

4. Core Sampling: A “core,” or drilled out section, of material is collected for study
Uses:

5. Core Sampling: A “core,” or drilled out section, of material is collected for study
Uses:
Can show how environments or populations have changed over time

6. Core Sampling: A “core,” or drilled out section, of material is collected for study
Uses:
Can show how environments or populations have changed over time

7. Core Sampling: A “core,” or drilled out section, of material is collected for study
Uses:
Can show how environments or populations have changed over time

8. Core Sampling: A “core,” or drilled out section, of material is collected for study
Uses:
Can show how environments or populations have changed over time

9. Location of core placement

10. Location of core placement
Random placement: Cores are taken randomly to decrease bias

11. Location of core placement
Random placement: Cores are taken randomly to decrease bias

12. Location of core placement
Random placement: Cores are taken randomly to decrease bias
Transect: Cores are taken at specific intervals to have a broad sample

13. Core samples look into the past

14. Core samples look into the past
Lower layers are older

15. Core samples look into the past
Lower layers are older

16. Layers can be Carbon-14 tested

17. Layers can be Carbon-14 tested
Carbon-14 is a radioactive isotope that breaks down by 50% every 5730 years.

18. Layers can be Carbon-14 tested
Carbon-14 is a radioactive isotope that breaks down by 50% every 5730 years.
Testing the amount of Carbon-14 in a sample gives the age.

20. Plant
Species
Sediment Layer 1 2 3 4 5
Western Hemlock
Douglas Fir
Sedges and Grasses
Alder
Grand Fir
Engelmann Spruce
Western Cedar
Lodgepole Pine
Oak
Alpine Sagebrush

21. Your task:
You and your team has been given a core that dates back 25,000 years.
Each team (Team A, B, and C) will search for pollen in their layer (1-5) and record their results in their team’s data table (on the whiteboard in lab).
Copy your teams data in your data table
You will then decipher your data individually by answering the assessment questions on the lab sheet.
Due at the end of the period.

22. #IAMDONE!
Clean your station, leaving all materials in their original condition
Complete follow-up questions using your group’s data
Keep your notebook!!!

23. Exit Ticket!!!!

24. Exit Ticket
A group of animals/plants that are similar and can reproduce offspring are a _______.
Organism
Community
Species
Ecosystem

25. Exit Ticket
A species introduced to an ecosystem that can cause negative impacts is called _____.
Native Species
Invasive Species
Commutative Species
Natural Species

26. Exit Ticket Ecologists use Quadrat sampling to ______________________.
Study abiotic factors
Estimate future offspring
Study an individual organism
Estimate population size