It indicates food / energy relationship between organisms at different trophic levels
(i) Pyramid of Number = example grassland ecosystem
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Producers are more in number than herbivores carnivores
(ii) Pyramid of Biomass example = forest / tree ecosystem
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Producers have more biomass than herbivores / carnivores
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Pyramid of biomass shows a sharp decrease in biomass in higher trophic levels
(iii) Pyramid of energy = example. grassland ecosystem
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Producers have more energy than herbivores / carnivores
(b) (i) Provides information of extinction of species
(ii) Regions with very high levels of species richness , high degree of endemism / species confined to that region and not found anywhere else are identified which need to be conserve all priority basis.
