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Which of the following statements are correctly matched? a) Pyramid of number in Grassland Ecosystem is upright. b) Pyramid of Biomass in Pond Ecosystem is inverted. c) Pyramid of Energy is always upright. d) Pyramid of Biomass in Forest Ecosystem is inverted. Choose the correct answer

Which of the following statements are correctly matched? a) Pyramid of number in Grassland Ecosystem is upright. b) Pyramid of Biomass in Pond Ecosystem is inverted. c) Pyramid of Energy is always upright. d) Pyramid of Biomass in Forest Ecosystem is inverted. Choose the correct answer Correct Answer (a), (b) and (c)

Explanation:

The correct option is-

  • Pyramid of number in Grassland Ecosystem is upright
  • Pyramid of Biomass in Pond Ecosystem is inverted.
  • Pyramid of Energy is always upright.

An ecological pyramid is a pictorial representation of the relationship between different organisms in an ecosystem.

Pyramid of numbers:

  • It depicts the numbers of individual organisms at different trophic levels of the food chain.
  • It is helpful to calculate the changes observed in the number of organisms in each trophic level.
  • An upright pyramid of numbers, the number of individuals decreases from the lower level to the higher level.
  • This type of pyramid is usually found in the grassland ecosystem and the pond ecosystem.
  • The grass in a grassland ecosystem occupies the lowest trophic level because of its abundance  
  • We can identify which level is in the endangered zone and need to be saved. But its limitation is we cannot count a number of all organisms accurately.

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Pyramid of Biomass:

  • Biomass is the dry weight of the organism.
  • A pyramid of biomass indicates a decrease of biomass in each tropical level from base to apex.
  • With higher tropical level biomass decreases for ecosystem on land and its inverse for an aquatic ecosystem where biomass increases with higher trophic level.
  • Biomass Pyramid - Land - Upright.
  • Biomass pyramid - Aquatic - Inverted


Pyramid of Energy:

An energy pyramid shows how much energy is needed as it flows upwards to support the next trophic level. Here the pyramid is always upward.

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Hence, only the option with Pyramid of Biomass in Forest Ecosystem is inverted is wrong because it is upright in forest and inverted in aquatic system.

Related Questions

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