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 ________.

Question

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The substantial increase in zooplankton biomass suggests that these lakes were nutrient-poor or oligotrophic prior to the fertilization treatment.

Researchers in Alaska Were Interested in Increasing the Sockeye Salmon