000111991 001__ 111991
000111991 005__ 20221004075845.0
000111991 0247_ $$2doi$$a10.1029/2021PA004241
000111991 0248_ $$2sideral$$a125762
000111991 037__ $$aART-2021-125762
000111991 041__ $$aeng
000111991 100__ $$aLowery C.M.
000111991 245__ $$aEarly paleocene paleoceanography and export productivity in the Chicxulub crater
000111991 260__ $$c2021
000111991 5060_ $$aAccess copy available to the general public$$fUnrestricted
000111991 5203_ $$aThe Chicxulub impact caused a crash in productivity in the world''s oceans which contributed to the extinction of ~75% of marine species. In the immediate aftermath of the extinction, export productivity was locally highly variable, with some sites, including the Chicxulub crater, recording elevated export production. The long-term transition back to more stable export productivity regimes has been poorly documented. Here, we present elemental abundances, foraminifer and calcareous nannoplankton assemblage counts, total organic carbon, and bulk carbonate carbon isotope data from the Chicxulub crater to reconstruct changes in export productivity during the first 3 Myr of the Paleocene. We show that export production was elevated for the first 320 kyr of the Paleocene, declined from 320 kyr to 1.2 Myr, and then remained low thereafter. A key interval in this long decline occurred 900 kyr to 1.2 Myr post impact, as calcareous nannoplankton assemblages began to diversify. This interval is associated with fluctuations in water column stratification and terrigenous flux, but these variables are uncorrelated to export productivity. Instead, we postulate that the turnover in the phytoplankton community from a post-extinction assemblage dominated by picoplankton (which promoted nutrient recycling in the euphotic zone) to a Paleocene pelagic community dominated by relatively larger primary producers like calcareous nannoplankton (which more efficiently removed nutrients from surface waters, leading to oligotrophy) is responsible for the decline in export production in the southern Gulf of Mexico. © 2021. American Geophysical Union. All Rights Reserved.
000111991 536__ $$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/CGL2015-64422-P$$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/PGC2018-093890-B-I00
000111991 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000111991 590__ $$a3.992$$b2021
000111991 592__ $$a1.568$$b2021
000111991 594__ $$a5.1$$b2021
000111991 591__ $$aOCEANOGRAPHY$$b11 / 66 = 0.167$$c2021$$dQ1$$eT1
000111991 593__ $$aOceanography$$c2021$$dQ1
000111991 591__ $$aPALEONTOLOGY$$b1 / 53 = 0.019$$c2021$$dQ1$$eT1
000111991 593__ $$aAtmospheric Science$$c2021$$dQ1
000111991 591__ $$aGEOSCIENCES, MULTIDISCIPLINARY$$b66 / 201 = 0.328$$c2021$$dQ2$$eT1
000111991 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000111991 700__ $$aJones H.L.
000111991 700__ $$aBralower T.J.
000111991 700__ $$aCruz L.P.
000111991 700__ $$aGebhardt C.
000111991 700__ $$aWhalen M.T.
000111991 700__ $$aChenot E.
000111991 700__ $$aSmit J.
000111991 700__ $$aPhillips M.P.
000111991 700__ $$aChoumiline K.
000111991 700__ $$0(orcid)0000-0003-4632-533X$$aArenillas I.$$uUniversidad de Zaragoza
000111991 700__ $$0(orcid)0000-0003-0063-8752$$aArz J.A.$$uUniversidad de Zaragoza
000111991 700__ $$aGarcia F.
000111991 700__ $$aFerrand M.
000111991 700__ $$aGulick S.P.S.
000111991 700__ $$aChristeson G.
000111991 700__ $$aClaeys P.
000111991 700__ $$aCockell C.
000111991 700__ $$aCoolen M.
000111991 700__ $$aFerrière L.
000111991 700__ $$aGoto K.
000111991 700__ $$aGreen S.
000111991 700__ $$aGrice K.
000111991 700__ $$aKring D.
000111991 700__ $$aLofi J.
000111991 700__ $$aMellett C.
000111991 700__ $$aMorgan J.
000111991 700__ $$aOcampo-Torres R.
000111991 700__ $$aPickersgill A.
000111991 700__ $$aPoelchau M.
000111991 700__ $$aRae A.
000111991 700__ $$aRasmussen C.
000111991 700__ $$aRebolledo-Vieyra M.
000111991 700__ $$aRiller U.
000111991 700__ $$aSato H.
000111991 700__ $$aSchaefer B.
000111991 700__ $$aTikoo S.
000111991 700__ $$aTomioka N.
000111991 700__ $$aUrrutia-Fucugauchi J.
000111991 700__ $$aWittmann A.
000111991 700__ $$aXiao L.
000111991 700__ $$aYamaguchi K.
000111991 700__ $$aZylberman W.
000111991 700__ $$aExpedition 364 Science Party
000111991 7102_ $$12000$$2655$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Paleontología
000111991 773__ $$g36, 11 (2021), 004241 [21 pp]$$tPaleoceanography and Paleoclimatology$$x2572-4525
000111991 8564_ $$s3160606$$uhttps://zaguan.unizar.es/record/111991/files/texto_completo.pdf$$yVersión publicada
000111991 8564_ $$s3256393$$uhttps://zaguan.unizar.es/record/111991/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000111991 909CO $$ooai:zaguan.unizar.es:111991$$particulos$$pdriver
000111991 951__ $$a2022-10-03-13:50:22
000111991 980__ $$aARTICLE