1. BES: Bioaccumulation Jigsaw Get out your journal now!
April 24, 2019
Get out your journal now!
Check to see if you have any growth and record results in your data table.

2. Reminder: Journal Check will be on Friday this week!
Don’t forget to highlight and add page numbers!
DUE:
Friday, April 26th

3. Warm Up
Think about the term “BIOMAGNIFICATION”. What do you think that means?
HINT…

4. Warm Up Review…
ANSWER…

5. See next slide for answer…
NOTES Make the following title: 4/24/19 Food Web Brainstorm Write these questions down with answers.
What are the different types of organisms in a food chain or food web?
What role or “trophic level” does each organism fill?
Consumer
Producer
decomposer
See next slide for answer…
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6. NOTES: Trophic Levels in a Food Web
A trophic level is the position that an organism occupies in a food chain or food web. (Write this in your journal)
First trophic level: producers (plants)
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7. Energy Through a Food Web
It takes more energy (or food) to support organisms at the top of the food web than at the bottom.
Within its lifetime, a tertiary consumer will consume 10,000 times more energy than a primary producer!
This chart illustrates energy content in Joules (J) of all organisms at a given trophic level within one example ecosystem.
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8. Toxins in the Food Web
Think about what you know about toxins in the environment:
How do you think toxins move through the food web?
How do you think toxins affect life at different levels in the food web?
Remember that organisms at the top of the food web consume 10,000 times more energy or food than organisms at the bottom of the food web.
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9. NOTES: Toxins in the Food Web
As toxins move through the food web, they can either bio accumulate or bio magnify.
Bioaccumulation: describes the general increase of toxins as they move from the abiotic environment into an organism’s tissue.
Bio magnification: describes the increasing concentration of toxins as they pass from one trophic level to another in a food web.
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10. Examples of Bio magnification
Mercury is a well-known example of bio magnification because it accumulates in the fish we eat.
Larger and older fish have higher levels of mercury in their body tissue.
Several organizations release fish safety guides to help consumers choose fish that are low in mercury.
Note: certain populations of people are more at risk for mercury poisoning because of what parts of the fish they eat. For example, certain asian populations eat lots of fish and the parts of the fish where methymercury builds up in fish’s bodies: fatty tissue, liver, head, skin. They also might eat fish that are more exposed to mercury, like fish that live along the bottom of the ocean (sea cucumbers, catfish, sole)
BUT, you should also remember that eating fish is part of a healthy diet, so you just need to eat it in moderation!
Seafood watch pamphlets, apps for your phone—let you now which fish are healthy for you to eat and which you should avoid, to help avoid mercury overexposure.
©2018 Educurious Partners. All rights reserved.

11. Module Assignment 3.2: Bioaccumulation
YOU get to become the expert again! Research your assigned issue and complete the appropriate section on your data table.
I would recommend starting with a Google search on the topic and then look for credible sources. Ex. Scientific findings, journals, scientific articles, etc. NOT Wikipedia!

12. Directions for Bioaccumulation Assignment:
Get with the other experts in your group (all “1’s” research together, all “2’s” research together, etc.) to ensure you have accurate information.
You will have 30 minutes to research and become the expert on your topic.
There will be 3 teaching groups. You will instruct your peers on your Biomagnification Topic. Make sure you are taking notes on the nine other issues being presented. Start with #1.
Tape this chart into your journal when complete.