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Bioaccumulation in the Great Lakes

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Bioaccumulation in the Great Lakes. Jay Sobel. Sara Syswerda. Game fish of the Great Lakes Region ... Fish are consumers, which means that they eat other ... – PowerPoint PPT presentation

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Title: Bioaccumulation in the Great Lakes


1
Bioaccumulation in the Great Lakes
  • Jay Sobel
  • Sara Syswerda

2
(No Transcript)
3
Game fish of the Great Lakes Region
4
What do the fish eat?
  • Fish are consumers, which means that they eat
    other organisms, and dont make their own food.
    They might eat
  • Plankton, algae, little fish, insects, dead
    stuff, fungi

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STOP!
  • Play game!

7
Rules of the Game
  • Each person is given a role as a member of a
    typical Great Lakes aquatic ecosystem
  • The object of the game is to gather as much food
    as possible while avoiding being eaten each
    member of the ecosystem gathers food in a
    different way, so read your info sheet
  • Some food sources will also have a penny
    attached, remove the penny and keep it in your
    ziploc bag
  • If you are tagged by somebody, read your cards to
    determine the outcome of the interaction
  • If you are eaten by a predator, give them all of
    your pennies and 25 of your food (drop the rest
    on the ground) and return to the starting point

8
At end of game
  • Record data on blackboard
  • amount of food gathered
  • number of pennies

9
Food web activity
  • Form groups of 4-5 members
  • Using the information sheets from the game, draw
    a diagram that illustrates the interactions
    between species (food web diagram)
  • Use lines and arrows to show outcomes of
    interactions (example)
  • volunteer

10
from Yodzis 2001
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What do organisms get from their prey?
  • Energy
  • Vitamins
  • Minerals
  • Water
  • Anything else?

12
You get chemicals, too! Here in Michigan
  • -Mercury
  • -PCBs
  • -Dioxin
  • -Chlordane
  • -PBBs
  • -DDT

13
Bioaccumulation
  • When chemicals get passed on from prey to the
    predators that eat them, we call this
    bioaccumulation.

14
Look at data from game
  • go to excel

15
from environment Canada (www.ec.gc.ca)
16
What does that mean if you eat big fish?
  • You will be getting all the chemicals that fish
    ate, all the chemicals the fish it ate ate, and
    so on, all the way down the food chain.

17
from Michigan Department of Natural Resources
18
(No Transcript)
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