Seasonal dynamics of guild structure in a bird assemblage of the central Monte desert

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dc.contributor.authorLopez de Casenave, Javier
dc.contributor.authorCueto, Victor R.
dc.contributor.authorMarone, Luis
dc.date.accessioned2025-01-21T01:05:12Z
dc.date.available2025-01-21T01:05:12Z
dc.date.issued2008
dc.description.abstractMost studies of ecological guilds consider guild membership as a fixed attribute of species, and the guild structure as a fixed attribute of a community. Consequently, almost no study tackled the examination of temporal changes in the guild structure of a particular assemblage. We used data on foraging patterns of central Monte desert birds to assess seasonal differences in resource use by resident species, and to examine seasonal changes in the guild structure of the assemblage. From 1993 until 1999, we quantified the use of foraging substrates, manoeuvres, and height strata, and the utilisation of plants by 18 bird species. Resident species showed different kinds of seasonal dynamics, from no noticeable to drastic changes in their foraging patterns. Seasonal changes in guild structure were remarkable. Only two guilds were present all year round (ground foragers and foliage foragers), although they suffered important species turnover. Three other guilds had a seasonal occurrence: graminivores (during the non-breeding season), arboreal herbivores, and aerial feeders (during the breeding season). Two species changed from one guild to another between seasons. Both presence-absence of migrant species, and changes in the feeding ecology of resident species had an influence on the temporal dynamics of guild structure. These factors appeared to be related with changing resource availability, especially with the birds' ability for facing lean conditions through migration and with the opportunistic use of seasonally superabundant resources. Our results undermine the trust in studies in which guild structure was assessed irrespective of temporal variations. We show also that guild membership is not a fixed attribute of a species: we should rather evaluate the individuals' resource use in a given moment to assign them to a guild, instead of obtaining a single measure purporting to represent a species' fixed attribute. (C) 2007 Gesellschaft fur Okologie. Published by Elsevier GmbH. All rights reserved.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.baae.2006.08.006
dc.identifier.eissn1618-0089
dc.identifier.issn1439-1791
dc.identifier.urihttps://doi.org/10.1016/j.baae.2006.08.006
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95857
dc.identifier.wosidWOS:000253080500009
dc.issue.numero1
dc.language.isoen
dc.pagina.final90
dc.pagina.inicio78
dc.revistaBasic and applied ecology
dc.rightsacceso restringido
dc.subjectArgentina
dc.subjectcommunity ecology
dc.subjectfeeding ecology
dc.subjectforaging patterns
dc.subjectguild membership
dc.subjectmigration
dc.subjectopportunism
dc.subject.ods13 Climate Action
dc.subject.ods14 Life Below Water
dc.subject.ods15 Life on Land
dc.subject.odspa13 Acción por el clima
dc.subject.odspa14 Vida submarina
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.titleSeasonal dynamics of guild structure in a bird assemblage of the central Monte desert
dc.typeartículo
dc.volumen9
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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