How do you measure biomass of the trophic levels of a biotic pyramid?

Question

i dont know how to measure.

the producer of my pyramid is grass, trees

the priamry consumor is mosquitos(male)

the secondary consumor is dragonfly, frog, toad

the tertiary consumor is a snake

the decomposer is a wormand a cricket.

i dont know how to find the biomass of each of these trophic levels. please help ii've looked everywhere

Answer 1

This might help:

http://users.rcn.com/jkimball.ma.ultrane...