Many of the Organisms in the Ocean Are Nutrient-Limited

Multiple Choice

Many of the organisms in the ocean are nutrient-limited. Which of the following would be the most reasonable approach if you wanted to investigate this phenomenon?

A) observe Antarctic Ocean productivity from year to year to see if it changes
B) experimentally enrich some areas of the ocean and compare their productivity to that of untreated areas
C) compare nutrient concentrations between the photic zone and the benthic zone in various marine locations
D) contrast nutrient uptake by autotrophs in marine locations that are different temperatures