By the end of section 2.3 you should be able to understand the following:
 Synthetic materials enter the food chain when plants absorb the chemicals, and they accumulate in the tissues of consumers.
 Synthetic chemicals are biomagnified at the top of the food pyramid.
 Heavy metals like lead, cadmium and mercury also bioaccumulate, with negative health affects.
 Scientists are trying methods like bioremediation to lessen the impact of these types of bioaccumulation.
NOTES
Why are amphibians an important group of ecological indicators for scientists?
Pg 92-93
What is bioaccumulation?
What are keystone species?
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Why is the bioaccumulation of certain chemicals alarming in keystone species?
Give an example in BC.
Why is there biomagnification at the highest levels of the food pyramid?
Outline the effect of
PCB’s in the Orca whale population. Pg 95
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_____________ eat large quantities of plants and carnivores eat large quantities of _________. A small concentration of chemical in producers and _________ and _____________ consumers can build up to cause problems at _________________________ levels.
Ex. Red tide is caused by an _____________. Red tide can produce
___________ ____________ __________ that can affect organisms such as ______ ________ ______. As shellfish eat the algae, the _______ will _________________ to a level that is poisonous to others.
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NOTES
What are persistent organic pollutants?
Give an example of a
POP and its effect in the ecosystem.
What is a ppm?
Table 2.2 pg 96
What are heavy metals?
Give three examples of heavy metals, and list their effects in ecosystems.
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2. DDT
1. it is equivalent to 1 drop of dye in _______ of water.
- How many times more concentrated is the DDT in the Cormorant than in the plankton?
Do the Reading Check on page 96
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What is bioremediation?
List two examples of reducing the effects of chemical pollution, including bioremediation.
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Do the Reading Check on page 99
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After you have completed the notes go back and answer the questions in the reading checks. Try to do this WITH OUT the notes. If you can not answer a question with out your notes put a star beside the question to remind yourself to go back and study that particular concept.
These answers are not in the back of the book and will be for marks. There will be a quiz on section 2.3 next week on WEDNESDAY.
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