Which of the following ecosystems would likely have the largest net primary productivity per hectare and why?
A) open ocean, because of the total biomass of photosynthetic autotrophs
B) grassland, because of rapid growth, the small standing crop biomass that results from consumption by herbivores, and rapid decomposition
C) tundra, because of the incredibly rapid period of growth during the summer season
D) deep ocean, due to the high activity of chemoautotrophs at deep sea vents

Question

Quizplus · Accepted Answer

Grasslands typically have a high net primary productivity per hectare due to their rapid growth rates, efficient nutrient cycling, and the fact that much of the biomass produced is quickly consumed by herbivores or decomposed, allowing for continuous growth and nutrient reuse. This contrasts with ecosystems like the open ocean or deep ocean, where nutrient availability and light penetration can limit productivity, and the tundra, where the growing season is very short.

Which of the Following Ecosystems Would Likely Have the Largest