1. The argument is made in terms of the ecological pyramid. 2. When an ecosystem is healthy, this graph produces a standard " ecological pyramid ". 3. Ecological pyramids place the primary producers at the base. 4. Graphic representations of the biomass or productivity at each tropic level are called ecological pyramids or trophic pyramids. 5. File : Ecological Pyramid . svg | An energy pyramid is a presentation of the trophic levels in an ecosystem. 6. Ecological pyramids are graphical representations, along the lines of the diagram at the right, which show how process of photosynthesis. 7. An ecological pyramid is a graphical representation that shows, for a given ecosystem, the relationship between biomass or biological productivity and trophic levels. 8. :( Edit conflict ) There's also the ecological pyramid to consider : there's a * lot * of grass, rather fewer grass-eaters, and even fewer grass-eater-eaters. 9. Among marine animals, pesticide concentrations are higher in carnivorous fishes, and even more so in the fish-eating birds and mammals at the top of the ecological pyramid. 10. Wolves dominated those landscapes throughout most of history, occupying the summit of the ecological pyramid until recently, when they were shot, trapped and poisoned nearly out of existence.