The turnover of biomass at each trophic level is represented by

An ecological pyramid of productivity is often more useful, showing the production or turnover of biomass at each trophic level. Instead of showing a single snapshot in time, productivity pyramids show the flow of energy through the food chain. Typical units would be grams per meter²  per year or calories per meter²  per year. As with the others, this graph begins with producers at the bottom and places higher trophic levels on top.