Question

Choose the drawback(s) of ecological pyramids:

• A. It is difficult to place omnivores in the ecological pyramid.
• B. Saprophytes are not taken into consideration.
• C. They overlook seasonal and diurnal variations.
• D. It indicates the amount of energy present at each trophic level.

Answer 1

Answer: (A), (B), (C)

The correct options are
A It is difficult to place omnivores in the ecological pyramid.
B Saprophytes are not taken into consideration.
C They overlook seasonal and diurnal variations.

Ecological pyramids are structures having stacks/blocks representing trophic levels. there are different types such as pyramid of numbers, biomass and energy. In case of energy pyramids, the amount of energy present at each trophic level in shown. Since omnivores consume both plants and animals, so it is difficult to place them on a particular trophic level. Saprophytes consume dead and decayed material and are not placed on any trophic level while making an ecological pyramid. Also, ecological pyramids don't count the changes in the productivity during day and night and even during changes of seasons.