Which of These Ecosystems Has the Lowest Net Primary Production

Question

Which of these ecosystems has the lowest net primary production per square meter?
A) a salt marsh
B) an open ocean
C) a coral reef
D) a grassland
E) a tropical rain forest

Accepted Answer

The open ocean has the lowest net primary production per square meter due to the oligotrophic nature of the system, meaning there are low levels of nutrients and low productivity. This is in contrast to other ecosystems like salt marshes and grasslands, which have high levels of productivity and therefore higher net primary production per square meter.