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Importance of natural cloud regimes to ecophysiology in the alpine species, Caltha leptosepala and Arnica parryi, Snowy Range Mountains, southeast Wyoming, USA

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dc.creatorSánchez Andrade, Adriana
dc.creatorHughes, Nicole M.spa
dc.creatorSmith, William K.spa
dc.date.accessioned2020-05-26T00:08:40Z
dc.date.available2020-05-26T00:08:40Z
dc.date.created2015spa
dc.description.abstractThe south-central Rocky Mountains, USA, are characterised by a dry, continental mesoclimate with typical convective cloud formation during the afternoon. Little is known about the specific influence of such predictable cloud patterns on the microclimate and ecophysiology of associated species. During the summer of 2012, days with afternoon clouds were most common (50% of all days) compared with completely clear (24%) or cloudy days (6.5%). In two representative alpine species, Caltha leptosepala DC. and Arnica parryi A. Gray, fully overcast days reduced mean daily photosynthesis (A) by nearly 50% relative to fully clear days. Mean afternoon A was significantly lower on fully cloudy days relative to days with afternoon clouds only or no clouds in both species. Notably, A did not differ during afternoon cloud days relative to clear afternoons. Afternoon clouds significantly reduced transpiration (E) in C. leptosepala relative to clear days, and both species showed mean reductions in plant water stress (i.e. higher ?), though this difference was not significant. Water use efficiency (WUE) (A/E) decreased from morning to afternoon, especially on cloudy days, and the presence of clouds had a positive effect on the light reactions of photosynthesis based on fluorescence measurements (Fv?/Fm?), in both species. Cloudy days were characterised by higher Fv/Fm than afternoon clouds and clear days during both the morning and the afternoon (especially for A. parryi) and recovery to near pre-dawn values for cloudy and afternoon cloud day types, but not clear days. Overall, similar ecophysiological advantages of this typical afternoon cloud pattern was apparent in both species, although their spatial microsite differences related to winter snow accumulation may also play an important role. © 2015 CSIRO.eng
dc.format.mimetypeapplication/pdf
dc.identifier.doihttps://doi.org/10.1071/FP14096
dc.identifier.issn14454408
dc.identifier.urihttps://repository.urosario.edu.co/handle/10336/24104
dc.language.isoengspa
dc.publisherCSIROspa
dc.relation.citationEndPage197
dc.relation.citationIssueNo. 2
dc.relation.citationStartPage186
dc.relation.citationTitleFunctional Plant Biology
dc.relation.citationVolumeVol. 42
dc.relation.ispartofFunctional Plant Biology, ISSN:14454408, Vol.42, No.2 (2015); pp. 186-197spa
dc.relation.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84920720684&doi=10.1071%2fFP14096&partnerID=40&md5=b7a89c176e5c9c9f8f7500f52505067bspa
dc.rights.accesRightsinfo:eu-repo/semantics/openAccess
dc.rights.accesoAbierto (Texto Completo)spa
dc.source.instnameinstname:Universidad del Rosariospa
dc.source.reponamereponame:Repositorio Institucional EdocURspa
dc.subject.keywordAlpine environmentspa
dc.subject.keywordChlorophyllspa
dc.subject.keywordCloud coverspa
dc.subject.keywordConvective cloudspa
dc.subject.keywordDicotyledonspa
dc.subject.keywordEcophysiologyspa
dc.subject.keywordFluorescencespa
dc.subject.keywordMicroclimatespa
dc.subject.keywordPhotosynthesisspa
dc.subject.keywordSpatiotemporal analysisspa
dc.subject.keywordTranspirationspa
dc.subject.keywordWater stressspa
dc.subject.keywordWater use efficiencyspa
dc.subject.keywordRocky mountainsspa
dc.subject.keywordSnowy rangespa
dc.subject.keywordUnited statesspa
dc.subject.keywordWyomingspa
dc.subject.keywordArnica parryispa
dc.subject.keywordCaltha leptosepalaspa
dc.subject.keywordChlorophyll fluorescencespa
dc.subject.keywordPhotosynthesisspa
dc.subject.keywordTranspirationspa
dc.subject.keywordWater use efficiencyspa
dc.titleImportance of natural cloud regimes to ecophysiology in the alpine species, Caltha leptosepala and Arnica parryi, Snowy Range Mountains, southeast Wyoming, USAspa
dc.typearticleeng
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersion
dc.type.spaArtículospa
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