APFIVE Biomagnification and Energy Transfer
A lake ecosystem shows PCB concentrations of 2 ppm in sediment, 5 ppm in benthic invertebrates, 25 ppm in small fish, and 125 ppm in large predatory fish. What can be inferred about the ecological efficiency between trophic levels in this system?
A
Energy transfer is more efficient than toxin transfer
B
Both energy and toxin transfer are equally efficient
C
Toxin concentration decreases with increasing body size
D
Energy transfer is inefficient while toxin transfer is efficient
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