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  2. Ecological pyramid - Wikipedia

    en.wikipedia.org/wiki/Ecological_pyramid

    Energy pyramids are necessarily upright in healthy ecosystems, that is, there must always be more energy available at a given level of the pyramid to support the energy and biomass requirement of the next trophic level. An ecological pyramid (also trophic pyramid, Eltonian pyramid, energy pyramid, or sometimes food pyramid) is a graphical ...

  3. Trophic level - Wikipedia

    en.wikipedia.org/wiki/Trophic_level

    The energy transferred between levels can also be thought of as approximating to a transfer in biomass, so energy pyramids can also be viewed as biomass pyramids, picturing the amount of biomass that results at higher levels from biomass consumed at lower levels. However, when primary producers grow rapidly and are consumed rapidly, the biomass ...

  4. Energy flow (ecology) - Wikipedia

    en.wikipedia.org/wiki/Energy_flow_(ecology)

    [2] [3] Each of the levels within the food chain is a trophic level. [1] In order to more efficiently show the quantity of organisms at each trophic level, these food chains are then organized into trophic pyramids. [1] The arrows in the food chain show that the energy flow is unidirectional, with the head of an arrow indicating the direction ...

  5. Food web - Wikipedia

    en.wikipedia.org/wiki/Food_web

    The intermediate levels are filled with omnivores that feed on more than one trophic level and cause energy to flow through several food pathways starting from a basal species. [14] In the simplest scheme, the first trophic level (level 1) is plants, then herbivores (level 2), and then carnivores (level 3).

  6. Biomass (ecology) - Wikipedia

    en.wikipedia.org/wiki/Biomass_(ecology)

    The pyramid then proceeds through the various trophic levels to the apex predators at the top. When energy is transferred from one trophic level to the next, typically only ten percent is used to build new biomass. The remaining ninety percent goes to metabolic processes or is dissipated as heat. This energy loss means that productivity ...

  7. Ecological efficiency - Wikipedia

    en.wikipedia.org/wiki/Ecological_efficiency

    The energy converted through photosynthesis is carried through the trophic levels of an ecosystem as organisms consume members of lower trophic levels. Primary production can be broken down into gross and net primary production. Gross primary production is a measure of the energy that a photoautotroph harvests from the sun.

  8. Depleted energy levels affect us all. But here's when they ...

    www.aol.com/depleted-energy-levels-affect-us...

    Because these and other medical conditions could explain unknown causes of depleted energy levels - especially if you've previously been feeling good - Beutler says it's worth talking to your ...

  9. Soil food web - Wikipedia

    en.wikipedia.org/wiki/Soil_food_web

    The phrase, trophic level, refers to the different levels or steps in the energy pathway. In other words, the producers, consumers, and decomposers are the main trophic levels. This chain of energy transferring from one species to another can continue several more times, but eventually ends.