000060919 001__ 60919
000060919 005__ 20170504082929.0
000060919 0247_ $$2doi$$a10.1073/pnas.1110601109
000060919 0248_ $$2sideral$$a76062
000060919 037__ $$aART-2012-76062
000060919 041__ $$aeng
000060919 100__ $$0(orcid)0000-0002-8801-9544$$aAlegret, L.$$uUniversidad de Zaragoza
000060919 245__ $$aEnd-Cretaceous marine mass extinction not caused by productivity collapse
000060919 260__ $$c2012
000060919 5060_ $$aAccess copy available to the general public$$fUnrestricted
000060919 5203_ $$aAn asteroid impact at the end of the Cretaceous caused mass extinction, but extinction mechanisms are not well-understood. The collapse of sea surface to sea floor carbon isotope gradients has been interpreted as reflecting a global collapse of primary productivity (Strangelove Ocean) or export productivity (Living Ocean), which caused mass extinction higher in the marine food chain. Phytoplankton-dependent benthic foraminifera on the deep-sea floor, however, did not suffer significant extinction, suggesting that export productivity persisted at a level sufficient to support their populations. We compare benthic foraminiferal records with benthic and bulk stable carbon isotope records from the Pacific, Southeast Atlantic, and Southern Oceans. We conclude that end-Cretaceous decrease in export productivity was moderate, regional, and insufficient to explain marine mass extinction. A transient episode of surface ocean acidification may have been the main cause of extinction of calcifying plankton and ammonites, and recovery of productivity may have been as fast in the oceans as on land.
000060919 536__ $$9info:eu-repo/grantAgreement/ES/MICINN/CGL2007-63724-BTE$$9info:eu-repo/grantAgreement/ES/MICINN/CGL2009-07101-E
000060919 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000060919 590__ $$a9.737$$b2012
000060919 591__ $$aMULTIDISCIPLINARY SCIENCES$$b4 / 56 = 0.071$$c2012$$dQ1$$eT1
000060919 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000060919 700__ $$aThomas, E.
000060919 700__ $$aLohmann, K.C.
000060919 7102_ $$12000$$2655$$aUniversidad de Zaragoza$$bDepartamento de Ciencias de la Tierra$$cPaleontología
000060919 773__ $$g109, 3 (2012), 728-732$$pProc. Natl. Acad. Sci.$$tProceedings of the National Academy of Sciences$$x0027-8424
000060919 8564_ $$s415224$$uhttps://zaguan.unizar.es/record/60919/files/texto_completo.pdf$$yVersión publicada
000060919 8564_ $$s146058$$uhttps://zaguan.unizar.es/record/60919/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000060919 909CO $$ooai:zaguan.unizar.es:60919$$particulos$$pdriver
000060919 951__ $$a2017-05-04-08:24:15
000060919 980__ $$aARTICLE