A pyramid of biomass shows the mass - in grams or kilograms - of the population of the trophic levels in a food chain. The bar for the producer at the bottom of the pyramid of number can be small ...

Integrating parasites into food webs also suggests that the classical Eltonian pyramid (Elton 1927) may need to be revised: if parasites feed at a trophic level above their hosts, parasites would ...