![Page 1: Science 10AP · Web view2.3 Enriched: The Effects of Bioaccumulation on Ecosystems (Refer to p. 92 – 103 of BC Science 10) Amphibians and the environment Why are frogs so severely](https://reader035.vdocuments.us/reader035/viewer/2022081409/60776ecefac6c6230034a0bc/html5/thumbnails/1.jpg)
2.3 Enriched: The Effects of Bioaccumulation on Ecosystems
(Refer to p. 92 – 103 of BC Science 10)
Amphibians and the environment
Why are frogs so severely affected by pollutants in their environment?
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
What are some causes of amphibian loss?
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
What is the difference between an insecticide, herbicide and pesticide?
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
HOW POLLUTANTS CLIMB THE FOOD CHAIN
How has human activity caused one of the biggest changes/disturbances to ecosystems?
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
BIOACCUMULATION
What is bioaccumulation? Is it helpful or harmful?
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
1
![Page 2: Science 10AP · Web view2.3 Enriched: The Effects of Bioaccumulation on Ecosystems (Refer to p. 92 – 103 of BC Science 10) Amphibians and the environment Why are frogs so severely](https://reader035.vdocuments.us/reader035/viewer/2022081409/60776ecefac6c6230034a0bc/html5/thumbnails/2.jpg)
Define keystone species.
_______________________________________________________________________
_______________________________________________________________________
What is an example of a keystone species in many forest ecosystems in British
Columbia? Give 3 reasons why.
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
How is biomagnification different to bioaccumulation?
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
What is red tide?
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
PCBs AND THE ORCA
What are PCBs and where do they come from?
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
2
![Page 3: Science 10AP · Web view2.3 Enriched: The Effects of Bioaccumulation on Ecosystems (Refer to p. 92 – 103 of BC Science 10) Amphibians and the environment Why are frogs so severely](https://reader035.vdocuments.us/reader035/viewer/2022081409/60776ecefac6c6230034a0bc/html5/thumbnails/3.jpg)
Why are PCBs a concern?
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
What is half-life?
_______________________________________________________________________
_______________________________________________________________________
PERSISTENT ORGANIC POLLUTANTS (POPs)
Why is a POP, Persistent Organic Pollutant?
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
What is DDT?
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
3
![Page 4: Science 10AP · Web view2.3 Enriched: The Effects of Bioaccumulation on Ecosystems (Refer to p. 92 – 103 of BC Science 10) Amphibians and the environment Why are frogs so severely](https://reader035.vdocuments.us/reader035/viewer/2022081409/60776ecefac6c6230034a0bc/html5/thumbnails/4.jpg)
Why do cormorants have the highest bioaccumulation of DDT, according to Table 2.2?
____________________________________________________________________
**Complete CC p. 103 #1-11
HEAVY METALS
What are Heavy Metals and when are they a problem?
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
Lead:
Environmental sources:
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
Effect on organisms:
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
Effect on humans:
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
4
![Page 5: Science 10AP · Web view2.3 Enriched: The Effects of Bioaccumulation on Ecosystems (Refer to p. 92 – 103 of BC Science 10) Amphibians and the environment Why are frogs so severely](https://reader035.vdocuments.us/reader035/viewer/2022081409/60776ecefac6c6230034a0bc/html5/thumbnails/5.jpg)
Cadmium:
Environmental sources:
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
Effect on organisms:
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
Effect on humans:
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
Mercury
Environmental sources:
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
Effect on organisms:
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
Effect on humans:
_________________________________________________________________
_________________________________________________________________
________________________________________________________________
REDUCING THE EFFECTS OF CHEMICAL POLLUTION
Two methods used to help solve the problem of chemical pollution include:
1. Trap the contaminant in the soil:
________________________________________________________
________________________________________________________
________________________________________________________
5
![Page 6: Science 10AP · Web view2.3 Enriched: The Effects of Bioaccumulation on Ecosystems (Refer to p. 92 – 103 of BC Science 10) Amphibians and the environment Why are frogs so severely](https://reader035.vdocuments.us/reader035/viewer/2022081409/60776ecefac6c6230034a0bc/html5/thumbnails/6.jpg)
________________________________________________________
________________________________________________________
2. Bioremediation:
________________________________________________________
________________________________________________________
________________________________________________________
________________________________________________________
**Complete CC p. 103 #13-21
6