Complex dynamics of tree cavities and nest webs in the Americas

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dc.contributor.authorCockle, Kristina
dc.contributor.authorIbarra Eliessetch, José Tomás
dc.contributor.authorTrzcinski, Kurtis
dc.contributor.authorWiebe, Karen L.
dc.contributor.authorAltamirano Oyarzún, Tomás Alberto
dc.contributor.authorEdworthy, Amanda
dc.contributor.authorMartin, Kathy
dc.date.accessioned2022-11-25T16:25:37Z
dc.date.available2022-11-25T16:25:37Z
dc.date.issued2018
dc.description.abstractThe Nest Web concept represents tree-cavity-nesting communities as hierarchical, commensal networks, whereby nesting cavities flow upward from trees to cavity producers (e.g., woodpeckers, decay organisms) to a diverse assemblage of non-excavators (e.g., parrots, songbirds). These nest webs are dynamic, complex, and often resilient. They include non-hierarchical feedback loops, such as facultative excavation, inter-guild predation and competition. For >20 years we studied >4000 nesting cavities in temperate British Columbia, Canada (1995-2016), temperate Chile (2010-2018) and subtropical Argentina (2006-2018), to examine the dynamics of cavity-nesting communities over time, at scales from individual cavities to whole nest webs. Individual cavities in large old-growth trees persisted longest. Cavities became larger as they aged, and were occupied by a succession of vertebrates (excavators, then small-bodied non-excavators, and finally largebodied non-excavators). Cavities produced 0–43 fledglings/cavity over their lifetime, but cavities with higher nest success were occupied fewer times by fewer species. At the nest web scale in Canada, an abundant facultative excavator declined in importance in the Nest Web during an insect outbreak that attracted obligate excavators, but then dramatically increased cavity production following wildfires. Logging resulted in disproportional biodiversity losses when it targeted key network hubs (large trees; Chile, Argentina) but not when a critical nesting tree species was retained (Canada). A nest web approach helped us understand interspecific interactions and test network theory; because these networks are strongly influenced by outside sources of uncertainty and non-linearity, a Complex Systems Science approach may improve predictions about their long-term dynamics
dc.fuente.origenSIPA
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/65803
dc.information.autorucSede regional de villarrica ; Ibarra Eliessetch, José Tomás ; 0000-0002-7705-3974 ; 120091
dc.language.isoen
dc.nota.accesoContenido parcial
dc.relation.ispartofInternational Ornithological Congress (27° : 2018 : Vancouver, Canada)
dc.rightsacceso abierto
dc.subjectOrnithologyes_ES
dc.subjectConservation biologyes_ES
dc.subjectTropical Ecologyes_ES
dc.subjectForest Ecology And Managementes_ES
dc.subjectEcologyes_ES
dc.subjectForest Ecologyes_ES
dc.titleComplex dynamics of tree cavities and nest webs in the Americases_ES
dc.typecomunicación de congreso
sipa.codpersvinculados120091
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