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Dynamic cloud regimes, incident sunlight, and leaf temperatures in espeletia grandiflora and Chusquea tessellata, two representative species of the Andean Páramo, Colombia

dc.creatorSánchez Andrade, Adriana
dc.creatorPosada Hostettler, Juan Manuel Robertospa
dc.creatorSmith, William K.spa
dc.date.accessioned2020-05-25T23:58:41Z
dc.date.available2020-05-25T23:58:41Z
dc.date.created2014spa
dc.description.abstractThe alpine páramo of Chingaza National Park, Colombia, has a highly variable cloud regime typical of many tropical alpine areas. Yet, little information is available regarding the effects of such dynamic sunlight regimes on alpine temperatures. A close association between changes in incident sunlight and corresponding air (Ta) and leaf (Tl) temperatures occurred in two dominant species with strongly contrasting leaf form and whole-plant architecture. Spikes in sunlight incidence of and gt;3000 ?mol m-2 s-1 occurred during cloud cover and corresponded to increases in Tl of 4-5 °C in a 1-min-interval in both species. Although Tl was predominately above Ta, during the day, depressions below Ta of over 6 °C occurred during cloudy conditions when photosynthetic photon flux density (PFDs) was and lt;400 ?mol m-2 s-1. The greatest frequency (69%) of changes in incident sunlight (PFDs; over 2-min intervals) was less than 100 ?mol m-2 s-1, although changes and gt;1000 ?mol m-2 s-1 occurred for 2.4% of the day, including a maximum change of 1512 ?mol m-2 s-1. These data may be valuable for predicting the ecophysiological impact of climate warming and associated changes in future cloud regimes experienced by tropical alpine species.eng
dc.format.mimetypeapplication/pdf
dc.identifier.doihttps://doi.org/10.1657/1938-4246-46.2.371
dc.identifier.issn15230430
dc.identifier.urihttps://repository.urosario.edu.co/handle/10336/22911
dc.language.isoengspa
dc.publisherInstitute of Arctic and Alpine Researchspa
dc.relation.citationEndPage378
dc.relation.citationIssueNo. 2
dc.relation.citationStartPage371
dc.relation.citationTitleArctic, Antarctic, and Alpine Research
dc.relation.citationVolumeVol. 46
dc.relation.ispartofArctic, Antarctic, and Alpine Research, ISSN:15230430, Vol.46, No.2 (2014); pp. 371-378spa
dc.relation.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84902194634&doi=10.1657%2f1938-4246-46.2.371&partnerID=40&md5=c50c6fecea2ddea3f9a0a332cb24daa1spa
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.keywordAir temperaturespa
dc.subject.keywordClimate changespa
dc.subject.keywordCloud coverspa
dc.subject.keywordDicotyledonspa
dc.subject.keywordEcophysiologyspa
dc.subject.keywordSolar radiationspa
dc.subject.keywordTundraspa
dc.subject.keywordAndesspa
dc.subject.keywordChingaza national parkspa
dc.subject.keywordColombiaspa
dc.titleDynamic cloud regimes, incident sunlight, and leaf temperatures in espeletia grandiflora and Chusquea tessellata, two representative species of the Andean Páramo, Colombiaspa
dc.typearticleeng
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersion
dc.type.spaArtículospa
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