Why is pyramid of biomass better than pyramid of numbers and difference between a pyramid of biomass and a pyramid of numbers?
Because a biomass pyramid accurately depicts the amount of live organic matter at each trophic level, it is a more useful tool for illustrating how energy moves through a food chain. It provides a visual representation of how energy availability decreases as one moves up the food chain. Differences with a pyramid of productivity: Productivity is the rate of energy generation over time, whereas biomass is the total mass of living things at a given point in time. Because productivity shows the flow of energy across time, biomass represents a snapshot in time. While productivity pyramids can take on many shapes based on ecological dynamics, biomass pyramids are typically shaped like a pyramid.