Open top chamber microclimate may limit photosynthetic processes in Antarctic lichen: Case study from King George Island, Antarctica

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datacite.alternateIdentifier.citationCzech Polar Reports, 9 (1), 77-61, 2019
datacite.alternateIdentifier.doi10.5817/CPR2019-1-6
datacite.alternateIdentifier.issn1805-0697
datacite.creatorCasanova-Katny, Angélica
datacite.creatorBarták, Milo
datacite.creatorGutierrez, Catalina
datacite.date2019
datacite.rightsAcceso abierto
datacite.subjectAntarctic Tundra
datacite.subjectChlorophyll Fluorescence
datacite.subjectCyanolichens
datacite.subjectElectron Transport Rate
datacite.subjectLong-term Exposition
datacite.subjectMonitoring Fluorometer
datacite.subjectPlacopsis Antarctica
datacite.titleOpen top chamber microclimate may limit photosynthetic processes in Antarctic lichen: Case study from King George Island, Antarctica
dc.contributor.authorCASANOVA KATNY, MARIA ANGELICA
dc.date.accessioned2025-10-06T14:21:49Z
dc.date.available2025-10-06T14:21:49Z
dc.description.abstractLong-term manipulated warming experiments using the open top chamber (OTC) approach tend to mimick the future climate and predict the changes in photosynthesis and production of vegetation under globally changed climate. In Antarctica, several longterm experiments are carried out recently. Here we report to the lichens grown in OTCs installed at the Fildes Peninsula (King George Island). The field study compares primary photochemical processes of photosynthesis in Antarctic lichen Placopsis antarctica grown for one year in OTC and compared to outside plot (control). We measured effective quantum yield of photosystem II (?<inf>PSII</inf>) of green algae part of thallus in 10 min. interval for 12 days. We examined the responses of diurnal ?<inf>PSII</inf> to PAR in relation to environmental factors through continuous 12-d-long monitoring of chlorophyll fluorescence parameters ?<inf>PSII</inf> in particular. Daily courses of ?<inf>PSII</inf> and photosynthetic electron transport rate (ETR) to photosynthetically active radiation (PAR) and hydration state of thallus have been assumed to reflect changes in physiological status of P. antarctica in changing Antarctic environment. The data indicate that OTC microenvironment may lead to partial limitation of photosynthetic processes in P. antarctica during austral summer season. The limitation is caused by accelerated dehydration of thallus in OTC compared to the outside generally colder control plot, and thus shortened physiologically active period of lichens in OTC. © 2020 Elsevier B.V., All rights reserved.
dc.description.ia_keywordantarctica, psii, processes, antarctic, thallus, photosynthetic, long
dc.formatPDF
dc.identifier.issn1805-0689
dc.identifier.urihttps://repositoriodigital.uct.cl/handle/10925/6816
dc.language.isoen
dc.publisherEmuni Press
dc.relationinstname: ANID
dc.relationreponame: Repositorio Digital RI2.0
dc.rights.driverinfo:eu-repo/semantics/openAccess
dc.sourceCzech Polar Reports
dc.subject.ia_odsODS 13: Acción por el clima
dc.subject.ia_oecd1nCiencias Naturales
dc.subject.ia_oecd2nCiencias Biológicas
dc.subject.ia_oecd3nCiencias del Medio Ambiente
dc.type.driverinfo:eu-repo/semantics/article
dc.type.driverhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.type.openaireinfo:eu-repo/semantics/publishedVersion
dspace.entity.typePublication
oaire.citationEdition2019
oaire.citationEndPage77
oaire.citationIssue1
oaire.citationStartPage61
oaire.citationTitleCzech Polar Reports
oaire.citationVolume9
oaire.fundingReferenceINACH RT2716
oaire.fundingReferenceANID FONDECYT 1181745 (Regular)
oaire.fundingReferenceCzech Ministry of Education LM2015078
oaire.fundingReferenceECOPOLARIS CZ.02.1.01/0.0/0.0/16_013/0001708
oaire.licenseConditionObra bajo licencia Creative Commons Atribución-No Comercial-Sin Derivadas 4.0 Internacional
oaire.licenseCondition.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
oaire.resourceTypeArtículo
oaire.resourceType.enArticle
relation.isAuthorOfPublicationa9399b7c-ca2e-4330-b761-690bd7ef26d8
relation.isAuthorOfPublication.latestForDiscoverya9399b7c-ca2e-4330-b761-690bd7ef26d8
uct.catalogadorjvu
uct.comunidadRecursos Naturalesen_US
uct.departamentoDepartamento de Ciencias Ambientales
uct.facultadFacultad de Recursos Naturales
uct.indizacionScopus
uct.indizacionWeb of Science
uct.indizacionCAB Abstracts
uct.indizacionCrossref
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