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trophic chain

См. также в других словарях:

  • Trophic cascade — Trophic cascades occur when predators in a food chain suppress the abundance of their prey, thereby releasing the next lower trophic level from predation (or herbivory if the intermediate trophic level is an herbivore). For example, if the… …   Wikipedia

  • Trophic level — First trophic level The plants in this image, and the algae and phytoplankton in the lake, are primary producers. They take nutrients from the soil or the water, and manufacture their own food by photosynthesis, using energy from the sun. The… …   Wikipedia

  • Trophic dynamics — In ecology, trophic dynamics is the system of trophic levels (Greek trophē , food), which describe the position that an organism occupies in a food chain what it eats, and what eats it. Energy economy Ecologists study the energy economies of… …   Wikipedia

  • Trophic state index — The quantities of nitrogen, phosphorus, and other biologically useful nutrients are the primary determinants of a body of water s trophic state index (TSI). Nutrients such as nitrogen and phosphorus tend to be limiting resources in standing water …   Wikipedia

  • trophic level — ▪ ecology  step in a nutritive series, or food chain, of an ecosystem. The organisms of a chain are classified into these levels on the basis of their feeding behaviour. The first and lowest level contains the producers, green plants (plant). The …   Universalium

  • trophic level — /trɒfɪk ˈlɛvəl/ (say trofik levuhl) noun a level in a food chain, represented as one of a succession of steps in the transfer of matter and energy in an ecosystem. The natural flow of energy in an ecosystem is from the sun to the plants (the… …  

  • trophic level — noun : one of the hierarchical strata of a food web characterized by organisms which are the same number of steps removed from the primary producers * * * ˌtrophic ˈlevel 7 [trophic level] noun (technical) each of several levels in an ↑ecosystem …   Useful english dictionary

  • trophic levels —    Feeding levels in a food chain, such as producers, herbivores, and so on. Most food chains include a maximum of four or five trophic levels [23] …   Lexicon of Cave and Karst Terminology

  • trophic cascade — a disruption of the food chain by the removal of a key species, often a predator, ramifying through the ecosystem allowing prey to flourish and with a marked effect even on numbers of zooplankton near the base of the food chain. This alters the… …   Dictionary of ichthyology

  • trophic class — the position in the food chain or web occupied by a species …   Dictionary of ichthyology

  • trophic — adjective a) Of or pertaining to nutrition b) Describing the relationships between the feeding habits of organisms in a food chain …   Wiktionary

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