Practicing Success
The pyramid of biomass in sea is generally inverted because: |
sunlight is filtered through sea water leading to less photosynthesis of the high salt content of sea water the biomass of phytoplankton far exceeds that of fishes the biomass of fishes far exceeds that of phytoplankton |
the biomass of fishes far exceeds that of phytoplankton |
The correct answer is Option (4) – the biomass of fishes far exceeds that of phytoplankton The pyramid of biomass in the sea is often inverted due to the higher biomass of fishes compared to phytoplankton. Phytoplankton, which are microscopic photosynthetic organisms, serve as the primary producers in marine ecosystems. They convert sunlight and nutrients into organic matter and form the base of the food chain. The pyramid of biomass in sea is generally inverted because the biomass of fishes far exceeds that of phytoplankton.The producers are smallest organisms while carnivores are large in size. Consequently , there is a gradual increase in biomass of organisms at successive trophic levels from producers onwards to top carnivores resulting in inverted pyramid. Thus, the biomass of phytoplanktons will be smaller than that of zooplanktons; the biomass of zooplanktons will be lesser than of primary carnivores ( e.g., small fishes). |