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trophic leveltrophische Ebene (ger.)

  • Any of a hierarchy of levels of an ecosystem, each consisting of organisms sharing the same function in the food-web, and the same relationship to the primary producers. (OED)
    nutrition food-cycle level
    1942

    Elton ('27) pointed out that food-cycles rarely have more than five trophic levels.

    Lindeman, R.L. (1942). The trophic-dynamic aspect of ecology. Ecology 23, 399-417: 407.

Cook, R.E. (1977). Raymond Lindeman and the trophic-dynamic concept in ecology. Science 198, 22-26.