Which of the Following Ecosystems Would Likely Have a Larger

Multiple Choice

Which of the following ecosystems would likely have a larger net primary productivity/hectare, and why?

A) open ocean, because of the total biomass of photosynthetic autotrophs
B) a temperate grassland, because of the small standing crop biomass that results from consumption by herbivores and rapid decomposition
C) tropical rain forest, because of the long growing season and large amount of leaf surface area
D) a cave, due to the lack of photosynthetic autotrophs
E) tundra, because of the incredibly rapid period of growth during the summer season