Aquatic Ecosystems are Least Likely to Be Limited by Which

Question

Aquatic ecosystems are least likely to be limited by which of the following nutrients?
A)nitrogen
B)carbon
C)phosphorus
D)iron
E)zinc

Accepted Answer

Aquatic ecosystems are least likely to be limited by carbon because it is abundant and easily obtainable from carbon dioxide in the atmosphere and dissolved in water. Nitrogen, phosphorus, iron, and zinc are all essential nutrients that may limit aquatic ecosystem productivity if they are in short supply.