A pyramid of biomass is always shaped like a pyramid because the biomass always goes down from one trophic level to the next.

What can you say about the number of organisms as you move along the food chain from producer up the trophic levels?

The energy-flow paradigm ... Plecoptera (0.57). Trophic position is calculated from the flow web (Figure 1) and is shown along with trophic level in Figure 2. There are 5 trophic levels in this ...

Trophic cascades by definition must occur across a minimum of three feeding levels. Indeed, this is how they most commonly occur, although evidence of 4- and 5-level trophic cascades have been ...