Demise of the planktic foraminifer genus Morozovella during the early eocene climatic optimum: New records from ODP Site 1258 (Demerara Rise, western equatorial Atlantic) and Site 1263 (Walvis Ridge, south Atlantic)
Here we present relative abundances of planktic foraminifera that span the Early Eocene Climatic Optimum (EECO) at Ocean Drilling Program (ODP) Site 1258 in the western equatorial Atlantic. The EECO (~53.3−49.1 Ma) represents peak Cenozoic warmth, probably related to high atmospheric CO2, and when p...
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ftunivferrarair:oai:iris.unife.it:11392/2421160 2024-02-11T10:08:04+01:00 Demise of the planktic foraminifer genus Morozovella during the early eocene climatic optimum: New records from ODP Site 1258 (Demerara Rise, western equatorial Atlantic) and Site 1263 (Walvis Ridge, south Atlantic) D'onofrio R. Luciani V. Dickens G. R. Wade B. S. Turner S. K. D'Onofrio, R. Luciani, V. Dickens, G. R. Wade, B. S. Turner, S. K. 2020 STAMPA http://hdl.handle.net/11392/2421160 https://doi.org/10.3390/geosciences10030088 https://www.mdpi.com/2076-3263/10/3/88/pdf?version=1584598850 https://www.mdpi.com/2076-3263/10/3/88 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000523701300010 volume:10 issue:3 firstpage:88 lastpage:109 numberofpages:22 journal:GEOSCIENCES http://hdl.handle.net/11392/2421160 doi:10.3390/geosciences10030088 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85080992456 https://www.mdpi.com/2076-3263/10/3/88/pdf?version=1584598850 https://www.mdpi.com/2076-3263/10/3/88 info:eu-repo/semantics/openAccess Atlantic Ocean Bulk carbon isotope Early Eocene Climatic Optimum Morozovella decline Morozovella test-size reduction Paleobiogeography Planktic foraminiferal changes info:eu-repo/semantics/article 2020 ftunivferrarair https://doi.org/10.3390/geosciences10030088 2024-01-24T17:42:08Z Here we present relative abundances of planktic foraminifera that span the Early Eocene Climatic Optimum (EECO) at Ocean Drilling Program (ODP) Site 1258 in the western equatorial Atlantic. The EECO (~53.3−49.1 Ma) represents peak Cenozoic warmth, probably related to high atmospheric CO2, and when planktic foraminifera, a dominant component of marine sediment, exhibit a major biotic response. Consistent with previous work, the relative abundance of the genus Morozovella, which dominated early Paleogene tropical-subtropical assemblages, markedly and permanently declined from a mean percentage of ~32% to less than ~7% at the beginning of the EECO. The distinct decrease in Morozovella abundance occurred at Site 1258 within ~20 kyr before a negative excursion in δ13C records known as the J event and which defines the beginning of EECO. Moreover, all morozovellid species except M. aragonensis dropped in abundance permanently at Site 1258, and this is related to a reduction in test-size. Comparing our data with that from other locations, the remarkable switch in planktonic foraminifera assemblages appears to have begun first with unfavourable environmental conditions near the Equator and then extended to higher latitudes. Several potential stressors may explain observations, including some combination of algal photosymbiont inhibition (bleaching), a sustained increase in temperature, or an extended decrease in pH. Article in Journal/Newspaper Planktonic foraminifera Università degli Studi di Ferrara: CINECA IRIS Geosciences 10 3 88 |
institution |
Open Polar |
collection |
Università degli Studi di Ferrara: CINECA IRIS |
op_collection_id |
ftunivferrarair |
language |
English |
topic |
Atlantic Ocean Bulk carbon isotope Early Eocene Climatic Optimum Morozovella decline Morozovella test-size reduction Paleobiogeography Planktic foraminiferal changes |
spellingShingle |
Atlantic Ocean Bulk carbon isotope Early Eocene Climatic Optimum Morozovella decline Morozovella test-size reduction Paleobiogeography Planktic foraminiferal changes D'onofrio R. Luciani V. Dickens G. R. Wade B. S. Turner S. K. Demise of the planktic foraminifer genus Morozovella during the early eocene climatic optimum: New records from ODP Site 1258 (Demerara Rise, western equatorial Atlantic) and Site 1263 (Walvis Ridge, south Atlantic) |
topic_facet |
Atlantic Ocean Bulk carbon isotope Early Eocene Climatic Optimum Morozovella decline Morozovella test-size reduction Paleobiogeography Planktic foraminiferal changes |
description |
Here we present relative abundances of planktic foraminifera that span the Early Eocene Climatic Optimum (EECO) at Ocean Drilling Program (ODP) Site 1258 in the western equatorial Atlantic. The EECO (~53.3−49.1 Ma) represents peak Cenozoic warmth, probably related to high atmospheric CO2, and when planktic foraminifera, a dominant component of marine sediment, exhibit a major biotic response. Consistent with previous work, the relative abundance of the genus Morozovella, which dominated early Paleogene tropical-subtropical assemblages, markedly and permanently declined from a mean percentage of ~32% to less than ~7% at the beginning of the EECO. The distinct decrease in Morozovella abundance occurred at Site 1258 within ~20 kyr before a negative excursion in δ13C records known as the J event and which defines the beginning of EECO. Moreover, all morozovellid species except M. aragonensis dropped in abundance permanently at Site 1258, and this is related to a reduction in test-size. Comparing our data with that from other locations, the remarkable switch in planktonic foraminifera assemblages appears to have begun first with unfavourable environmental conditions near the Equator and then extended to higher latitudes. Several potential stressors may explain observations, including some combination of algal photosymbiont inhibition (bleaching), a sustained increase in temperature, or an extended decrease in pH. |
author2 |
D'Onofrio, R. Luciani, V. Dickens, G. R. Wade, B. S. Turner, S. K. |
format |
Article in Journal/Newspaper |
author |
D'onofrio R. Luciani V. Dickens G. R. Wade B. S. Turner S. K. |
author_facet |
D'onofrio R. Luciani V. Dickens G. R. Wade B. S. Turner S. K. |
author_sort |
D'onofrio R. |
title |
Demise of the planktic foraminifer genus Morozovella during the early eocene climatic optimum: New records from ODP Site 1258 (Demerara Rise, western equatorial Atlantic) and Site 1263 (Walvis Ridge, south Atlantic) |
title_short |
Demise of the planktic foraminifer genus Morozovella during the early eocene climatic optimum: New records from ODP Site 1258 (Demerara Rise, western equatorial Atlantic) and Site 1263 (Walvis Ridge, south Atlantic) |
title_full |
Demise of the planktic foraminifer genus Morozovella during the early eocene climatic optimum: New records from ODP Site 1258 (Demerara Rise, western equatorial Atlantic) and Site 1263 (Walvis Ridge, south Atlantic) |
title_fullStr |
Demise of the planktic foraminifer genus Morozovella during the early eocene climatic optimum: New records from ODP Site 1258 (Demerara Rise, western equatorial Atlantic) and Site 1263 (Walvis Ridge, south Atlantic) |
title_full_unstemmed |
Demise of the planktic foraminifer genus Morozovella during the early eocene climatic optimum: New records from ODP Site 1258 (Demerara Rise, western equatorial Atlantic) and Site 1263 (Walvis Ridge, south Atlantic) |
title_sort |
demise of the planktic foraminifer genus morozovella during the early eocene climatic optimum: new records from odp site 1258 (demerara rise, western equatorial atlantic) and site 1263 (walvis ridge, south atlantic) |
publishDate |
2020 |
url |
http://hdl.handle.net/11392/2421160 https://doi.org/10.3390/geosciences10030088 https://www.mdpi.com/2076-3263/10/3/88/pdf?version=1584598850 https://www.mdpi.com/2076-3263/10/3/88 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000523701300010 volume:10 issue:3 firstpage:88 lastpage:109 numberofpages:22 journal:GEOSCIENCES http://hdl.handle.net/11392/2421160 doi:10.3390/geosciences10030088 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85080992456 https://www.mdpi.com/2076-3263/10/3/88/pdf?version=1584598850 https://www.mdpi.com/2076-3263/10/3/88 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3390/geosciences10030088 |
container_title |
Geosciences |
container_volume |
10 |
container_issue |
3 |
container_start_page |
88 |
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1790607017790930944 |