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”

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

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

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

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

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

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

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

Location of core placement

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

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

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

Core samples look into the past

Core samples look into the past Lower layers are older

Core samples look into the past Lower layers are older

Layers can be Carbon-14 tested

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

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.

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

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.

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

Exit Ticket!!!!

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

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

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