Distinct oxygen environments shape picoeukaryote assemblages thriving oxygen minimum zone waters off central Chile

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dc.contributor.authorDe la Iglesia, Rodrigo
dc.contributor.authorEchenique-Subiabre, Isidora
dc.contributor.authorRodriguez-Marconi, Susana
dc.contributor.authorPablo Espinoza, Juan
dc.contributor.authorvon Dassow, Peter
dc.contributor.authorUlloa, Osvaldo
dc.contributor.authorTrefault, Nicole
dc.date.accessioned2025-01-23T19:47:07Z
dc.date.available2025-01-23T19:47:07Z
dc.date.issued2020
dc.description.abstractOxygen minimum zones (OMZs) support ocean biogeochemical cycles of global importance. The OMZ off central Chile is characterized by seasonally variable oxygen concentrations due to upwelling events. Bacterial and archaeal communities from this area have been previously described; however, picoeukaryote communities remain largely unexplored. In order to improve our knowledge on picoeukaryote ecology and the effect of controlling factors on its community structure, environmental parameters and 18S rRNA metabarcoding analyses were performed in water samples collected at several depths at a time series station on the continental shelf in March, May and August. Our results showed that oxygen, nitrate, silicate and temperature are relevant factors shaping the picoeukaryote community structure. Overall, according to our sequence dataset, the OMZ was dominated by Dinophyceae members including marine parasitic dinoflagellates. Moreover, dysoxic and suboxic conditions were enriched by fungi and phagotrophic protists from Ustilaginomycetes, Bicoecea and Choanoflagellatea. The latter is particularly relevant in the understanding of metazoan evolution and the origins of multicellularity in low-oxygen environments. Picoeukaryote communities changed significantly over the 3 months sampled with variations in water column stratification, including the occurrence of a winter bloom of Mamiellales. Altogether, this study reveals a great diversity and dynamics of picoeukaryotes inhabiting a coastal OMZ.
dc.fuente.origenWOS
dc.identifier.doi10.1093/plankt/fbaa036
dc.identifier.eissn1464-3774
dc.identifier.issn0142-7873
dc.identifier.urihttps://doi.org/10.1093/plankt/fbaa036
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/100350
dc.identifier.wosidWOS:000593097700003
dc.issue.numero5
dc.language.isoen
dc.pagina.final529
dc.pagina.inicio514
dc.revistaJournal of plankton research
dc.rightsacceso restringido
dc.subjectoxygen minimum zone
dc.subjectpicoeukaryote diversity
dc.subject18S rRNA gene
dc.subjectnext-generation sequencing
dc.subjectlow oxygen
dc.subject.ods15 Life on Land
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.titleDistinct oxygen environments shape picoeukaryote assemblages thriving oxygen minimum zone waters off central Chile
dc.typeartículo
dc.volumen42
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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