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Predation and competition effects on the size diversity of aquatic communities

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dc.contributor Universitat de Vic. Escola Politècnica Superior
dc.contributor Universitat de Vic - Universitat Central de Catalunya. Centre Tecnològic BETA
dc.contributor.author Quintana, Xavier D.
dc.contributor.author Arim, Matías
dc.contributor.author Badosa, Anna
dc.contributor.author Blanco, José María
dc.contributor.author Boix, Dani
dc.contributor.author Brucet Balmaña, Sandra
dc.contributor.author Compte, Jordi
dc.contributor.author Egozcue, Juan J.
dc.contributor.author Eyto, Elvira de
dc.contributor.author Gaedke, Ursula
dc.contributor.author Gascón, Stéphanie
dc.contributor.author Gil de Solá, Luis
dc.contributor.author Irvine, Kenneth
dc.contributor.author Jeppesen, Erik
dc.contributor.author Lauridsen, Torben L.
dc.contributor.author López-Flores, Rocío
dc.contributor.author Mehner, Thomas
dc.contributor.author Romo, Susana
dc.contributor.author SondergaarD, Martin
dc.date.accessioned 2015-01-16T11:02:07Z
dc.date.available 2015-01-16T11:02:07Z
dc.date.issued 2015
dc.identifier.citation Quintana, X. D., Arim, M., Badosa, A., Blanco, J. M., Boix, D., Brucet, S., et al. (2015). Predation and competition effects on the size diversity of aquatic communities. Aquatic Sciences, 77(1), 45-57. ca_ES
dc.identifier.issn 1015-1621
dc.identifier.uri http://hdl.handle.net/10854/3813
dc.description.abstract Body size has been widely recognised as a key factor determining community structure in ecosystems. We analysed size diversity patterns of phytoplankton, zooplankton and fish assemblages in 13 data sets from freshwater and marine sites with the aim to assess whether there is a general trend in the effect of predation and resource competition on body size distribution across a wide range of aquatic ecosystems. We used size diversity as a measure of the shape of size distribution. Size diversity was computed based on the Shannon-Wiener diversity expression, adapted to a continuous variable, i.e. as body size. Our results show that greater predation pressure was associated with reduced size diversity of prey at all trophic levels. In contrast, competition effects depended on the trophic level considered. At upper trophic levels (zooplankton and fish), size distributions were more diverse when potential resource availability was low, suggesting that competitive interactions for resources promote diversification of aquatic communities by size. This pattern was not found for phytoplankton size distributions where size diversity mostly increased with low zooplankton grazing and increasing nutrient availability. Relationships we found were weak, indicating that predation and competition are not the only determinants of size distribution. Our results suggest that predation pressure leads to accumulation of organisms in the less predated sizes, while resource competition tends to favour a wider size distribution. ca_ES
dc.format application/pdf
dc.format.extent 13 p. ca_ES
dc.language.iso eng ca_ES
dc.publisher Springer ca_ES
dc.rights Tots els drets reservats ca_ES
dc.rights (c) Springer (The original publication is available at www.springerlink.com)
dc.subject.other Biologia ca_ES
dc.title Predation and competition effects on the size diversity of aquatic communities ca_ES
dc.type info:eu-repo/semantics/article ca_ES
dc.identifier.doi https://doi.org/10.1007/s00027-014-0368-1
dc.rights.accesRights info:eu-repo/semantics/closedAccess ca_ES
dc.type.version info:eu-repo/publishedVersion ca_ES
dc.indexacio Indexat a SCOPUS
dc.indexacio Indexat a WOS/JCR ca_ES

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