Past responses of modern phytoplankton and subfossil diatoms to volcanism in an Andean lake (central Chile)

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dc.catalogadoraba
dc.contributor.authorCarrevedo, María Laura
dc.contributor.authorCaputo, Luciano
dc.contributor.authorAlfaro Ayllón, Fernando Daniel
dc.contributor.authorHerrera, Ana Luisa
dc.contributor.authorFrugone-alvarez, Matias
dc.contributor.authorGarces, Blas Valero
dc.contributor.authorLatorre H., Claudio
dc.date.accessioned2025-06-04T22:26:32Z
dc.date.available2025-06-04T22:26:32Z
dc.date.issued2025
dc.description.abstractLaguna del Maule is a volcanic basin lake in the Central Chilean Andes that contains a peculiar and poorly understood algal flora from an ecological perspective. We present a comprehensive list of modern phytoplankton and limnological parameters (measured in 2011 and 2015), as well as a subfossil diatom assemblage spanning the past similar to 700 years. We examined the relationship between the past assemblages and two Holocene tephra layers, pH, and the impact of recent warming. Chlorophyll values (1.3-1.8 mu g l-1) are indicative of an oligotrophic lake. Counts (past and modern specimens) totalled two hundred fifty-four taxa: Bacillariophyceae (239, mainly subfossil), Chlorophyta (4), Chrysophyta (3), Cryptophyta (3), Cyanophyta (3) and Dinophyta (2). Diatom groups included: twelve centric (the most abundant specimens) and two hundred twenty-seven pennate taxa; of the latter, thirty-three were araphid and one hundred and ninety-four were either monoraphid or biraphid. An increased richness was observed after deposition of the tephra layers, along with different diatom assemblages associated with each tephra. Alkaliphilous-circumneutral taxa dominated, in concordance with the alkaline basin conditions of Laguna del Maule. A recent megadrought brought a shift from planktic to benthic diatoms, as coastal areas expanded, fostering a higher diversity of biraphid genera. Records of past and present dynamics of Andean lacustrine microorganisms are necessary to further evaluate responses to critical global environmental change and for high-altitude aquatic ecosystem conservation efforts.
dc.description.funderFONDECYT
dc.format.extent21 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1080/0269249X.2024.2432356
dc.identifier.eissn2159-8347
dc.identifier.issn0269-249X
dc.identifier.urihttps://doi.org/10.1080/0269249X.2024.2432356
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/104594
dc.identifier.wosidWOS:001425397200001
dc.information.autorucFacultad de Ciencias Biológicas; Carrevedo, María Laura; S/I; 209411
dc.information.autorucFacultad de Ciencias Biológicas; Alfaro Ayllón, Fernando Daniel; S/I; 168690
dc.information.autorucFacultad de Ciencias Biológicas; Latorre H., Claudio; 0000-0003-4708-7599; 55090
dc.language.isoen
dc.nota.accesocontenido parcial
dc.revistaDIATOM RESEARCH
dc.rightsacceso restringido
dc.subjectPhotosynthetic aquatic microorganisms
dc.subjectCircumneutrality
dc.subjectDiversity
dc.subjectHabitat
dc.subjecttephra
dc.subject.ddc570
dc.subject.deweyBiologíaes_ES
dc.subject.ods06 Clean water and sanitation
dc.subject.ods14 Life below water
dc.subject.ods15 Life on land
dc.subject.odspa06 Agua limpia y saneamiento
dc.subject.odspa14 Vida submarina
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.titlePast responses of modern phytoplankton and subfossil diatoms to volcanism in an Andean lake (central Chile)
dc.typeartículo
sipa.codpersvinculados209411
sipa.codpersvinculados168690
sipa.codpersvinculados55090
sipa.trazabilidadWOS;2025-03-01
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