Avian diversity above the clouds: comparing elevational patterns in north and south temperate mountains

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dc.contributor.authorAltamirano Oyarzún, Tomás Alberto
dc.contributor.authorDe Zwaan, Devin
dc.contributor.authorIbarra Eliessetch, José Tomás
dc.contributor.authorMartin, Kathy
dc.date.accessioned2022-11-22T19:38:10Z
dc.date.available2022-11-22T19:38:10Z
dc.date.issued2018
dc.description.abstractMountain ecosystems comprise 24% of the land-base of the Americas, and are critical components of the life-cycle for 35% of North American bird species. Globally, however, high elevation avian communities are poorly monitored, with taxonomic and functional diversity receiving little attention. In 2017, we initiated a temperate montane bird study, comparing: i) taxonomic and functional turnover across three habitats increasing in elevation: upper montane (>50% tree cover), subalpine (5-50% tree cover), and alpine (<5% tree cover), and ii) the breeding strategies of alpine birds in North and South America. We conducted 600 diurnal bird point counts in six North temperate (British Columbia, Canada; 54°N latitude) and 10 South temperate mountains (Chile; 39°S latitude). Species richness was comparable between sites (49-54 species), but decreased with elevation in Canada (upper montane: 31, alpine: 16) compared to remaining consistent across elevation in the Chilean Andes (~33 in each habitat). Species composition among mountains was highly variable in both hemispheres (Jaccard index < 0.5) indicating potential variation in drivers such as habitat structure. We found contrasting patterns in alpine breeding strategies, as open-cup nesters made up 88% (14/16 species) of the Canadian alpine community, while 100% of the 37 nests (6 species) found in the Chilean alpine were cavity nesters (rock crevices or ground excavations). Comparing high elevation temperate ecosystems in the Americas provides a strong framework to address avian breeding dynamics in stochastic environments, as well as understand the potential conservation value of mountain habitats as refugia for avian populations with environmental change
dc.fuente.origenSIPA
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/65649
dc.information.autorucSede regional de villarrica ; Ibarra Eliessetch, José Tomás ; 0000-0002-7705-3974 ; 120091
dc.language.isoen
dc.nota.accesoContenido parcial
dc.relation.ispartofAmerican Ornithological Meeting (2018 : Tucson, Estados Unidos)
dc.rightsacceso abierto
dc.subjectBotanyes_ES
dc.subjectOrnithologyes_ES
dc.subjectConservation biologyes_ES
dc.subjectEcologyes_ES
dc.subjectAndeses_ES
dc.subjectFunctional diversityes_ES
dc.titleAvian diversity above the clouds: comparing elevational patterns in north and south temperate mountainses_ES
dc.typecomunicación de congreso
sipa.codpersvinculados120091
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