1.

What does an Ecological Pyramid indicate ? Explain the three different types of upright Pyramids in nature with the help of an example each.

Answer»

It indicates food / energy relationship between organisms at different trophic levels
(i) Pyramid of Number = example grassland ecosystem 
                    ↓
Producers are more in number than herbivores carnivores
(ii) Pyramid of Biomass example = forest / tree ecosystem 
                    ↓
Producers have more biomass than herbivores / carnivores
//
Pyramid of biomass shows a sharp decrease in biomass in higher trophic levels
(iii) Pyramid of energy = example. grassland ecosystem 
                    ↓
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.


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