Answer:
Ecological pyramids are graphical representations
of the relationship between organisms of different trophic levies that can be
expressed in terms of number, biomass or energy,
In most ecosystems, the pyramid of
number is upright, i.e., producers are more in number than the herbivores and herbivores
are more in number than the carnivores. But, the pyramid of number may be
inverted as in a forest ecosystem, where the number of insects(primary
consumers) are greater than the number of trees (producers).
The pyramid of biomass is
upright, generally, as the biomass of producers is more than biomass of
herbivores and that of herbivores is more than biomass of carnivores. But, it
is inverted in ecosystems like sea ecosystem, where the biomass of fishes
(primary consumers)exceeds than phytoplankton (producers).
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