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Question
Which of the following is not used for construction of ecological pyramids?
Which of the following is not used for construction of ecological pyramids?
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Solution
The correct option is A Fresh weight
Ecological pyramids represent the trophic structure and function of an ecosystem. In an ecological pyramid, the first trophic level forms the base and the successive trophic levels, the tiers, make up the apex. Ecological pyramids may be of three general types: pyramid of numbers, pyramid of biomass and pyramid of energy.
Pyramid of biomass i.e. the living weight of the organisms of the food chain present at any time in the ecosystem forms the pyramids of biomass. The pyramid of biomass indicates the decrease or the gradual reduction in biomass at each trophic level from base to apex. Fresh weight is not used in ecological pyramids.
Dry weight is preferred over fresh weight as the fresh weight is liable to be influenced by seasonal moisture differences.
Ecological pyramids represent the trophic structure and function of an ecosystem. In an ecological pyramid, the first trophic level forms the base and the successive trophic levels, the tiers, make up the apex. Ecological pyramids may be of three general types: pyramid of numbers, pyramid of biomass and pyramid of energy.
Pyramid of biomass i.e. the living weight of the organisms of the food chain present at any time in the ecosystem forms the pyramids of biomass. The pyramid of biomass indicates the decrease or the gradual reduction in biomass at each trophic level from base to apex. Fresh weight is not used in ecological pyramids.
Dry weight is preferred over fresh weight as the fresh weight is liable to be influenced by seasonal moisture differences.
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