Henrietta Dawson presents with a chief complaint of pain and weakness in her arms and neck. After an H&P and review of diagnostic tests that include a myelogram, her doctor diagnoses a herniated nucleus pulposus at the ______ level of her spine.
An ecological pyramid (also trophic pyramid, energy pyramid, or sometimes food pyramid) is a graphical representation designed to show the biomass or bio productivity at each trophic level in a given ecosystem. Biomass is the amount of living or organic matter present in an organism.Biomass pyramids show how much biomass is present in the organisms at each trophic level, while productivity pyramids show the production or turnover in biomass.n energy pyramid is a presentation of the trophic levels in an ecosystem. Energy from the sun is transferred through the ecosystem by passing through various trophic levels. Roughly 10% of the energy is transferred from one trophic level to the next, thus preventing a large amounts of trophic levels.
It is standard practice to place producers at the bottom of the pyramid, with primary consumers, secondary consumers, tertiary consumers etc above them. The width of each bar should be proportional to the quantity that is being displayed, and the height is usually the same for each bar. It is possible to produce pyramids to describe either a food chain or a food web. In the case of a food web, all the producers, primary consumers, secondary consumers, tertiary consumers are lumped together (into the appropriate categories!) Food pyramids are often used in order to show the efficiency of transfer from one trophic level to the next. Just as in constructing a building, a broad and firm foundation is necessary if the upper layers are to be properly supported.