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单词 food web
释义
food web

Biology
  • A system of food chains that are linked with one another. In a food web a particular organism may feed at more than one trophic level. For example, in a pond food web a freshwater mussel may feed directly on green algae, in which case it is a primary consumer. However, it can also feed on protozoa, which are themselves primary consumers, in which case the mussel is the secondary consumer. A food web does not usually include the decomposers, but these organisms are very important in the flow of energy through a food web (see energy flow).


Geography
  • A series of interconnected and overlapping food chains in an ecosystem. A small change in the number of species in a food web can have consequences both for community structure and ecosystem processes (Emmerson et al. (2005) Glob. Change Biol. 11, 3).

    food web

    Food web


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