Each step is called a trophic level: producers are on the first trophic level 1, ... For example, a bar representing one tree will be largest as it has more mass than primary consumers.

For each of the 80 plots of the Jena Experiment, the researchers assembled trophic network models of the grassland ecosystem. These contain the standing biomass on every feeding level and the flow ...

For example, estuarine killifish ... including species richness, the total number of links, food chain length (the number of trophic levels in a web), and connectance (Lafferty et al. 2008).