Researchers in Alaska were interested in increasing the sockeye salmon (Oncorhynchus nerka) population in three coastal lakes. To accomplish this, the ponds were treated with fertilizers. As a result, zooplankton biomass increased between 40% and 700% in the three lakes. The substantial growth in zooplankton would suggest that prior to these experiments, these lakes were __________________.  

A.  eutrophic
B.  stratified
C.  subject to low light levels
D.  oligotrophic


D.  oligotrophic

Biology & Microbiology

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Answer the following statement true (T) or false (F)

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What will be an ideal response?

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