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Trophic and individual efficiencies of size-structured communities

Författare:
Publiceringsår: 2009
Språk: Engelska
Sidor: 109-114
Publikation/Tidskrift/Serie: Proceedings of the Royal Society - B Biological Sciences
Volym: 276
Nummer: 1654
Dokumenttyp: Artikel
Förlag: Royal Society

Sammanfattning

Individual and trophic efficiencies of size-structured communities are derived from mechanistically based principles at the individual level. The derivations are relevant for communities with a size-based trophic structure, i.e. where trophic level is strongly correlated with individual size as in many aquatic systems. The derivations are used to link Lindeman's trophic theory and trophic theory based on average individuals with explicit individual-level size spectrum theory. The trophic efficiency based on the transfer of mass between trophic levels through predator-prey interactions is demonstrated to be valid only when somatic growth can be ignored. Taking somatic growth into account yields an average individual growth efficiency that is smaller than the trophic efficiency.

Disputation

Nyckelord

  • Biology and Life Sciences
  • structured populations
  • ecological efficiency
  • trophic efficiency
  • trophic level
  • size spectrum

Övriga

Published
Yes
  • ISSN: 0962-8452

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