An Ecologist's Goal Is to Maintain the Health of an Aquatic

Multiple Choice

An ecologist's goal is to maintain the health of an aquatic ecosystem by identifying potentially damaging factors before they cause problems.In her research on a pristine lake ecosystem, she would be most likely to study which topic in the natural setting rather than in a laboratory?

A) The effect of a chemical pollutant on a fish species
B) The short-term effects of genetic manipulation of algal photosynthesis
C) The changing community structure of the lake over time
D) The effects of introducing a new top predator into the lake
E) The effect of algal blooms caused by excess nutrients on lake biochemistry