Question

Q. Which of the following ecological pyramids is/are upright in case of an aquatic Ecosystem?

Select the correct answer using the code given below.

• A.
  1 and 2 only
• B.
  1 and 3 only
• C.
  2 and 3 only
• D.
  1, 2 and 3

Answer 1

The correct option is B

1 and 3 only
Explanation:

Statement 1 is correct: Pyramid of Energy is always upright.

Statement 2 is incorrect: In an aquatic system, the biomass increases at higher trophic levels as the carnivorous fish have the most abundant biomass. Thus, the pyramid of biomass is inverted.

Statement 3 is correct: In an aquatic ecosystem, the producers are phytoplankton such as algae, bacteria etc. which are maximum in number. The small herbivorous fishes are smaller in number than producers, while the small carnivorous fishes are even less in number. Lastly, the apex consumers are least in number. Therefore, the pyramid is upright.