EasyBotanyEcological pyramid
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Which of the following statements is true for the given ecological pyramid?
A
Small number of phytoplankton support large number of zooplankton
B
Small biomass of primary producers supports large number of primary consumers in aquatic habitats
C
A large number of herbivores is supported by small number of producers in aquatic habitats
D
A large standing crop of phytoplankton is supported by small standing crop of zooplankton
Explanation
The given ecological pyramid represents an inverted pyramid of biomass, which is characteristic of aquatic ecosystems. In such ecosystems, the primary producers (phytoplankton) have a small standing biomass at any given time because they are small in size and have very short life span, even though they reproduce rapidly. Despite their low biomass, they are capable of supporting a large biomass of primary consumers (zooplankton). This is why the bar representing primary consumers (PC = 21) is larger than that of primary producers (PP = 4). Therefore, the correct statement is that a small biomass of primary producers supports a large number of primary consumers in aquatic habitats, which corresponds to Option 2.
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