Question

The pyramid shows the relative biomass of zooplankton and phytoplankton in a marine ecosystem.
The biomass of the zooplanktons is higher than that of the phytoplanktons because

• A. The zooplanktons convert energy more efficiently
• B. The zooplanktons have a shorter life cycle than the phytoplanktons
• C. The phytoplanktons are individually much smaller than the zooplanktons
• D. The phytoplanktons have an extremely high turnover rate

Answer 1

The correct option is A The zooplanktons convert energy more efficiently

The biomass of the zooplanktons is higher than that of the phytoplanktons because of the following reasons-

• In Aquatic ecosystem Phytoplanktons grow and reproduce rapidly so their total weight at an instant is more compared to the preceding trophic level.
  
• The biomass of zooplankton is greater than phytoplankton because of their small size and low weight .
  
• The producer in ocean or aquatic ecosystem producers are zooplankton, have short life span and turn over and have lower mass than phytoplankatons.
  
• The biomass of tropic level is depend on the longevity of member.