Question

In most ecosystems, all the pyramids of number, biomass, and energy are upright. Suggest on occasion each where the pyramid of number and pyramid of biomass are inverted.

Answer 1

When a big tree is considered as an ecosystem- pyramid of number is inverted. Pyramid of biomass in sea is also inverted.

Answer 2

[1] Pyramid of number is inverted in case of Aquatic Ecosystem.

Here is an example:

Millions of phytoplanktons----- eaten by thousands of zooplanktons----- eaten by hundreds of small fishes----- eaten by few large fishes----- eaten by some (small in number) of fish eating birds.

[2] Pyramid of Mass is inverted in Parasitic Food Chain.

Here is an example:

One large tree----- many small sparrows residing on it------- many small bugs and lices feeding on sparrow----- many bacteria in bugs and lices.

[Consider mass of single organism belonging to each trophic level]