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Question : Define ecological pyramids and describe with examples, pyramids of number and biomass. |
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Answer» SOLUTION :An ecological pyramid maybe defined as a graphicalrepresentation of the number or biomass or status of accumulated energy at different trophic levels in a food chain in an ecosystem . a.Pyramid of numbers : A pyramid of numbers is the GRAPHICAL representation depicting the arrangement of number of individuls of different trophic level in a food chain in an ecosystem . The pyramid of numbers is found in animal communities . The shape of the pyramids may be upringht . e.g. Food chain in a grassland ecosystem or pond ecosystem and INVERTED . e.g. Parasitive food chain . b. Pyramid of biomass : Pyramid of biomass is a graphicalrepresentation of biomass PRESENT per unit area in different trophic levels . e.g. Grassland and forest ecosystem . |
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