Researchers in Alaska Were Interested in Increasing the Sockeye Salmon

Multiple Choice

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