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The early Toarcian (early Jurassic) ostracod extinction events in the Iberian Range: The effect of temperature changes and prolonged exposure to low dissolved oxygen concentrations

dc.contributor.authorArias Fernández, María del Carmen
dc.date.accessioned2023-06-19T13:25:30Z
dc.date.available2023-06-19T13:25:30Z
dc.date.issued2013
dc.description.abstractThe early Toarcian extinction event, once regarded as spanning in the late Pliensbachian–early Toarcian boundary period, actually occurred in two distinct phases in the early Toarcian of the Iberian Range. The first episode occurred in the Mirabile Subzone, Tenuicostatum Zone and is characterised by the disappearance of about 12% of ostracod species and one suborder, the Metacopina (Superfamily Healdioidea). This study shows that this suborder disappears during stratigraphical intervals that are considered to be representative of low oxygen conditions in the Iberian Range. The collapse of marine ecosystems (affecting up to 40% of ostracod species) in the Elegantulum Subzone, Serpentinum Zone was most likely triggered by a sudden and widespread lethal increase in seawater temperature. These combined processes of oxygenation and temperature change are considered to be responsible for the profound changes in marine environments that resulted in the early Toarcian ostracod extinction in the Iberian Range.
dc.description.departmentDepto. de Geodinámica, Estratigrafía y Paleontología
dc.description.facultyFac. de Ciencias Geológicas
dc.description.refereedTRUE
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/26708
dc.identifier.doi10.1016/j.palaeo.2013.07.004
dc.identifier.issn0031-0182
dc.identifier.officialurlhttp://www.elsevier.com/locate/palaeo
dc.identifier.urihttps://hdl.handle.net/20.500.14352/33644
dc.journal.titlePalaeogeography, palaeoclimatology, palaeoecology
dc.language.isoeng
dc.page.final55
dc.page.initial40
dc.publisherElsevier
dc.rights.accessRightsopen access
dc.subject.cdu565.33(234.1)
dc.subject.keywordEarly Jurassic
dc.subject.keywordMetacopine
dc.subject.keywordMass extinctions
dc.subject.keywordOstracoda
dc.subject.keywordLow oxygen episodes
dc.subject.keywordWater temperature
dc.subject.ucmPaleontología
dc.subject.unesco2416 Paleontología
dc.titleThe early Toarcian (early Jurassic) ostracod extinction events in the Iberian Range: The effect of temperature changes and prolonged exposure to low dissolved oxygen concentrations
dc.typejournal article
dc.volume.number387
dspace.entity.typePublication
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