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Bioaccumulation
Content
Bioaccumulation Biomagnification Bioaccumulation vs Biomagnification What types of substances
bioaccumulate and which do not? Concentration of DDT in tissue Concentration of mercury in fish
Bioaccumulation Definition: The accumulation (gradual
gathering) of substances transferring from the environment into an organism.
Types of Substances that can accumulate: Nutrients, Toxins, Pesticides, Organic and Inorganic Compounds and Elements (such as mercury), and other pollutants.
Bioaccumulation
How substances can get from the environment into an organism:
Food intake (can eat something from environment that contains substance)
Respiration (breathing it in) Skin Contact
Bioaccumulation
Example of Pesticides: DDT (chemical)
Example of naturally occurring elements: MERCURY (low concentrations can cause
Link to Resource
http://www.nwf.org/Wildlife/Wildlife-Conservation/Food-Webs.aspx
https://www.youtube.com/watch?v=DxqDaTUh08o
https://www.youtube.com/watch?v=E5P-UoKLxlA
”Madd as a hatter”
BiomagnificationSubstances such as pollutants become
concentrated as you move up the food chain
Energy passes through the food chain
Energy is lost as you move up the Food Pyramid
Levels of toxins and harmful substances can increase as you move up the Food Pyramid
Bioaccumulation vs Biomagnification
Both describe the increase of the amount of a substance in an organism (1,3)
Bioaccumulation occur within a single organism (1)
Biomagnification occurs across trophic levels (3)
Concentration of DDT in tissue
•How does it pass through a food chain
•Used as a pesticide – from insects to fish, birds and then larger animals
Mercury in Fish
Fish absorb mercury efficiently
Larger fish eat many small fish and build up higher levels of mercury
Some have been banned for
consumption for they present a toxic risk
Works cited
1. "Bioaccumulation". Wikipedia. 13.06.2010 <http://en.wikipedia.org/wiki/Bioaccumulation>.
2. "Bioaccumulation". Toxics US Gov. 13.06.2010 <http://toxics.usgs.gov/definitions/bioaccumulation.html>. http://www.marietta.edu/~biol/102/2bioma95.html
3. "Biomagnification and Bioaccumulation". Tripod. 13.06.2010 <http://domchemct.tripod.com/index.html>. http://wiki.answers.com/Q/Example_of_biomagnification
4. "Biomagnification". 13.06.2010 <http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/D/DDTandTrophicLevels.html >. http://www.dowcorning.com/content/publishedlit/01-1128-01.pdf
5. "Environmental Biology - Ecosystems ". 13.06.2010 <http://www.marietta.edu/~biol/102/ecosystem.html>. http://www.pollutionissues.com/A-Bo/Bioaccumulation.html
6. "Food Chain/Biomagnification". 13.06.2010 <http://science.jrank.org/pages/2801/Food-Chain-Web-Biomagnification.html>.