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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
18/11/1997 |
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Data da última atualização: |
05/04/2017 |
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Autoria: |
STRANGE, E. M.; MOYLE, P. B.; FOIN, T. C. |
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Título: |
Interactions between stochastic and deterministic processes in stream fish community assembly. |
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Ano de publicação: |
1992 |
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Fonte/Imprenta: |
Environmental Biology of Fishes, v.36, p.1-15, 1992. |
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Idioma: |
Inglês |
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Conteúdo: |
Numerous studies have attempted to determine whether stream fish communities are structured primarily by deterministic or stochastic processes. Previous work has assumed that stream communities will show either persistence about an equilibrium because of strong density-dependent processes or random variation in structure as a result of environmental stochasticity. In a 10-year studi of a California stream, fish community structure changed under the influence of storm-induced high events that impacted recruitment. Species' relative abundances were altered as pre-recruitment stream discharges differentially influenced year-class strength among species with contrasting life histories. Simulation of stream fish community assembly under flow-driven recruitment variation indicates that community structure will vary depending on how particular high-flow events affect species' relative abundances and ongoing density-dependent processes, including competition and predation. Results suggest that stream fish communities are likely to show alternate states rather than a single persistent equilibrium. However, community assembly will not be random but will depended on situation-specific interactions between density-independent and density-dependent process. |
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Palavras-Chave: |
Comunidade; Desenvolvimento; Environmental stochasticity; Fluxo; Natural variation; Stream fish; Variacao natural. |
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Thesagro: |
Peixe. |
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Thesaurus Nal: |
community development. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01972naa a2200253 a 4500
001 1791927
005 2017-04-05
008 1992 bl --- 0-- u #d
100 1 $aSTRANGE, E. M.
245 $aInteractions between stochastic and deterministic processes in stream fish community assembly.
260 $c1992
520 $aNumerous studies have attempted to determine whether stream fish communities are structured primarily by deterministic or stochastic processes. Previous work has assumed that stream communities will show either persistence about an equilibrium because of strong density-dependent processes or random variation in structure as a result of environmental stochasticity. In a 10-year studi of a California stream, fish community structure changed under the influence of storm-induced high events that impacted recruitment. Species' relative abundances were altered as pre-recruitment stream discharges differentially influenced year-class strength among species with contrasting life histories. Simulation of stream fish community assembly under flow-driven recruitment variation indicates that community structure will vary depending on how particular high-flow events affect species' relative abundances and ongoing density-dependent processes, including competition and predation. Results suggest that stream fish communities are likely to show alternate states rather than a single persistent equilibrium. However, community assembly will not be random but will depended on situation-specific interactions between density-independent and density-dependent process.
650 $acommunity development
650 $aPeixe
653 $aComunidade
653 $aDesenvolvimento
653 $aEnvironmental stochasticity
653 $aFluxo
653 $aNatural variation
653 $aStream fish
653 $aVariacao natural
700 1 $aMOYLE, P. B.
700 1 $aFOIN, T. C.
773 $tEnvironmental Biology of Fishes$gv.36, p.1-15, 1992.
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Registro original: |
Embrapa Pantanal (CPAP) |
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