Fiyona Biomagnification Through a Food Chain Purpose: You will use M&M candies to model bioaccumulation and biomagnification through a food chain. Background: Shortly after WWII, a new super-pesticide was put into wide-spread use across the United States. Dichloro- diphenyl-trichloroethane (DDT), the first synthetic pesticide, had been used with massive success during World War II to combat malaria and other diseases carried by insects. Not until 1962, did people start to question this chemical and the unforeseen negative effects it was having on the environment. DDT stayed within a food chain, building in toxicity as it was passed in the tissues from one trophic level to the next. This phenomenon, known as biomagnification, seemed to affect larger birds more than smaller ones and not by simply killing them, but by altering how they metabolized calcium. Because they could not process calcium properly, these birds could not build shells strong enough to last through incubation. Thus, by the late 1960's populations of Osprey, Brown Pelicans, and Bald Eagles were critically low and some species, such as the Peregrine Falcon, were extinct in certain regions. Materials and Equipment (per lab group) 100 m & m's Paper towel to lay m & m's on 5 medium cups labeled "minnow" 2 larger cups - one labeled "eel #1", other labeled "eel #2" 1 bowl labelled "osprey" Procedure: Don't Eat Us!!!! 1. Dump the 100 M&M's in a pile on paper towels on your desk. This represents the phytoplankton population in a lake. The printed 'm' on the candy represents the amount of DDT (in ppm) the phytoplankton ingested from pesticide runoff from a nearby agricultural area. Each circle below represents one phytoplankton. 2. Make 20 piles of 5 M&M's to represent the population of 20 "zooplankton" in the lake. Colour the circles below according to the amount of DDT present using the chart. Each circle represents one phytoplankton. Each group of 5 represents 1 zooplankton. Record the total amount of DDT eaten by each zooplankton by adding the amount of every 5 circles into Table 1 "DDT for each zooplankton" (Note: 0.5 values are possible). M&M key for DDT representation 'm' printed on the candy Amount of DDT represented (ppm) Phytoplankton circles below Full 'm' on the candy Partial 'm' on the candy No 'm' on the candy 0 Do not color the circle 0.5 1 Color in half the circle Color in a full circle Phytoplankton Consumed per Zooplankton 0000000000000000000000000 0000000000000000000000000 0000000000000000000000000 0000000000000000000000000 12 1+4 Co.5) 33(0.5)= 1.5 4+ (0.5)=6 7 (0.5) 3+ 6 (0.5)=6

Fiyona Biomagnification Through a Food Chain Purpose: You will use M&M candies to model bioaccumulation and biomagnification through a food chain. Background: Shortly after WWII, a new super-pesticide was put into wide-spread use across the United States. Dichloro- diphenyl-trichloroethane (DDT), the first synthetic pesticide, had been used with massive success during World War II to combat malaria and other diseases carried by insects. Not until 1962, did people start to question this chemical and the unforeseen negative effects it was having on the environment. DDT stayed within a food chain, building in toxicity as it was passed in the tissues from one trophic level to the next. This phenomenon, known as biomagnification, seemed to affect larger birds more than smaller ones and not by simply killing them, but by altering how they metabolized calcium. Because they could not process calcium properly, these birds could not build shells strong enough to last through incubation. Thus, by the late 1960's populations of Osprey, Brown Pelicans, and Bald Eagles were critically low and some species, such as the Peregrine Falcon, were extinct in certain regions. Materials and Equipment (per lab group) 100 m & m's Paper towel to lay m & m's on 5 medium cups labeled "minnow" 2 larger cups - one labeled "eel #1", other labeled "eel #2" 1 bowl labelled "osprey" Procedure: Don't Eat Us!!!! 1. Dump the 100 M&M's in a pile on paper towels on your desk. This represents the phytoplankton population in a lake. The printed 'm' on the candy represents the amount of DDT (in ppm) the phytoplankton ingested from pesticide runoff from a nearby agricultural area. Each circle below represents one phytoplankton. 2. Make 20 piles of 5 M&M's to represent the population of 20 "zooplankton" in the lake. Colour the circles below according to the amount of DDT present using the chart. Each circle represents one phytoplankton. Each group of 5 represents 1 zooplankton. Record the total amount of DDT eaten by each zooplankton by adding the amount of every 5 circles into Table 1 "DDT for each zooplankton" (Note: 0.5 values are possible). M&M key for DDT representation 'm' printed on the candy Amount of DDT represented (ppm) Phytoplankton circles below Full 'm' on the candy Partial 'm' on the candy No 'm' on the candy 0 Do not color the circle 0.5 1 Color in half the circle Color in a full circle Phytoplankton Consumed per Zooplankton 0000000000000000000000000 0000000000000000000000000 0000000000000000000000000 0000000000000000000000000 12 1+4 Co.5) 33(0.5)= 1.5 4+ (0.5)=6 7 (0.5) 3+ 6 (0.5)=6

Understanding Nutrition (MindTap Course List)

15th Edition

ISBN:9781337392693

Author:Eleanor Noss Whitney, Sharon Rady Rolfes

Publisher:Eleanor Noss Whitney, Sharon Rady Rolfes

Chapter20: Hunger And The Global Environment

Section: Chapter Questions

Problem 1BCTQ: At first glance, labeling appears to be a helpful way for consumers to make informed choices about...

See similar textbooks