Class 12 · Ecosystem

Ecological Pyramids: Structure and Types — NEET Biology

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This, relationship is expressed in terms of number, biomass or energy. The base of each pyramid represents the producers or the first trophic level while the apex represents tertiary or top level consumer. The three types of ecological pyramids that are usually studied are (a) pyramid of number; (b) pyramid of biomass and (c) pyramid of energy. For detail.

🖼️Related NCERT figure: A pyramid diagram showing trophic levels with number of individuals. The pyramid shows four levels from bottom to top: P (Producer) with 5,842,000, PC (Primary consumer) with 708,000, SC (Secondary consumer) with 3,54,000, and TC (Tertiary consumer) with 3. (Figure 12.4 (a) Pyramid of numbers in a grassland ecosystem. Only three top-carnivores are supported in an ecosystem based on production of nearly 6 millions plants)
NCERT Biology · Class 12 · Chapter 12 · Paragraph 30
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QuestionPractice Question

Match the following: Column I A. Fragmentation B. Net Primary Productivity C. Tertiary Consumer D. Pyramid of Numbers in grassland Column II 1. Top carnivore 2. Biomass available to heterotrophs 3. Upright 4. Breakdown of detritus into smaller particles

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