Which was the habitat of early Eocene planktic foraminifer Chiloguembelina? Stable isotope paleobiology from the Atlantic Ocean and implication for paleoceanographic reconstructions
The planktic foraminiferal genus Chiloguembelina is characterized by tiny test and biserial disposition of chambers. Largely accepted ecological interpretation ascribes biserial planktic foraminifera as eutrophic and low-oxygen tolerant forms inhabiting the Oxygen Minimum Zone (OMZ). However, this e...
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Online Access: | http://hdl.handle.net/11392/2421164 https://doi.org/10.1016/j.gloplacha.2020.103216 https://www.sciencedirect.com/science/article/pii/S0921818120301077 |
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ftunivferrarair:oai:iris.unife.it:11392/2421164 2024-02-11T10:07:14+01:00 Which was the habitat of early Eocene planktic foraminifer Chiloguembelina? Stable isotope paleobiology from the Atlantic Ocean and implication for paleoceanographic reconstructions Luciani V. D'Onofrio R. Filippi G. Moretti S. Luciani, V. D'Onofrio, R. Filippi, G. Moretti, S. 2020 STAMPA http://hdl.handle.net/11392/2421164 https://doi.org/10.1016/j.gloplacha.2020.103216 https://www.sciencedirect.com/science/article/pii/S0921818120301077 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000540178200011 volume:191 firstpage:103216-1 lastpage:103216-12 numberofpages:12 journal:GLOBAL AND PLANETARY CHANGE http://hdl.handle.net/11392/2421164 doi:10.1016/j.gloplacha.2020.103216 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85085271472 https://www.sciencedirect.com/science/article/pii/S0921818120301077 info:eu-repo/semantics/openAccess Atlantic Ocean Chiloguembelina habitat Denitrification Early Eocene Climatic Optimum Paleoceanography Planktic foraminifera Stable carbon and oxygen isotopes info:eu-repo/semantics/article 2020 ftunivferrarair https://doi.org/10.1016/j.gloplacha.2020.103216 2024-01-24T17:42:13Z The planktic foraminiferal genus Chiloguembelina is characterized by tiny test and biserial disposition of chambers. Largely accepted ecological interpretation ascribes biserial planktic foraminifera as eutrophic and low-oxygen tolerant forms inhabiting the Oxygen Minimum Zone (OMZ). However, this ecological interpretation does not agree with all available data from Cenozoic record. Actually, chiloguembelinid stable isotope paleobiology is highly variable through time and space as it indicates mixed-layer habitat on earliest Eocene, middle Eocene and Late Oligocene but thermocline habitat during middle Eocene from northwest Atlantic Ocean. However, chiloguembelinid stable-isotope data were so far lacking from the early Eocene. This interval includes the early Eocene Climatic Optimum (EECO, ~53–48 Ma) that is the crucial time when Earth's surface temperatures and pCO2 reached their maximum levels in the Cenozoic. We present here new chiloguembelinid oxygen and carbon stable-isotope data from early Eocene Atlantic Ocean Drilling Program (ODP) Sites 1051, 1258, 1263 and 690. We also generate new data on Chiloguembelina abundance from Site 1051 and compare our record with those previously published from sites 1263 and 1258 in order to correlate the early Eocene paleoceanographic distribution of this genus through the Atlantic Ocean. Interestingly, Chiloguembelina became virtually absent at the beginning of the EECO in the subtropical, equatorial and temperate Atlantic sites. Our findings clearly prove that early Eocene Chiloguembelina occupied a deep-water niche throughout the Atlantic Ocean as demonstrated by its stable isotope signature close to the deep-dweller Subbotina and benthic foraminifera. These evidences provide critical paleoceanographic implications suggesting that intermediate water temperatures probably rose significantly during the EECO thus becoming too warm for this genus. Elevated ocean temperatures enhanced the rate of bacterial respiration and remineralization significantly thus resulting in ... Article in Journal/Newspaper Northwest Atlantic Università degli Studi di Ferrara: CINECA IRIS Global and Planetary Change 191 103216 |
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Open Polar |
collection |
Università degli Studi di Ferrara: CINECA IRIS |
op_collection_id |
ftunivferrarair |
language |
English |
topic |
Atlantic Ocean Chiloguembelina habitat Denitrification Early Eocene Climatic Optimum Paleoceanography Planktic foraminifera Stable carbon and oxygen isotopes |
spellingShingle |
Atlantic Ocean Chiloguembelina habitat Denitrification Early Eocene Climatic Optimum Paleoceanography Planktic foraminifera Stable carbon and oxygen isotopes Luciani V. D'Onofrio R. Filippi G. Moretti S. Which was the habitat of early Eocene planktic foraminifer Chiloguembelina? Stable isotope paleobiology from the Atlantic Ocean and implication for paleoceanographic reconstructions |
topic_facet |
Atlantic Ocean Chiloguembelina habitat Denitrification Early Eocene Climatic Optimum Paleoceanography Planktic foraminifera Stable carbon and oxygen isotopes |
description |
The planktic foraminiferal genus Chiloguembelina is characterized by tiny test and biserial disposition of chambers. Largely accepted ecological interpretation ascribes biserial planktic foraminifera as eutrophic and low-oxygen tolerant forms inhabiting the Oxygen Minimum Zone (OMZ). However, this ecological interpretation does not agree with all available data from Cenozoic record. Actually, chiloguembelinid stable isotope paleobiology is highly variable through time and space as it indicates mixed-layer habitat on earliest Eocene, middle Eocene and Late Oligocene but thermocline habitat during middle Eocene from northwest Atlantic Ocean. However, chiloguembelinid stable-isotope data were so far lacking from the early Eocene. This interval includes the early Eocene Climatic Optimum (EECO, ~53–48 Ma) that is the crucial time when Earth's surface temperatures and pCO2 reached their maximum levels in the Cenozoic. We present here new chiloguembelinid oxygen and carbon stable-isotope data from early Eocene Atlantic Ocean Drilling Program (ODP) Sites 1051, 1258, 1263 and 690. We also generate new data on Chiloguembelina abundance from Site 1051 and compare our record with those previously published from sites 1263 and 1258 in order to correlate the early Eocene paleoceanographic distribution of this genus through the Atlantic Ocean. Interestingly, Chiloguembelina became virtually absent at the beginning of the EECO in the subtropical, equatorial and temperate Atlantic sites. Our findings clearly prove that early Eocene Chiloguembelina occupied a deep-water niche throughout the Atlantic Ocean as demonstrated by its stable isotope signature close to the deep-dweller Subbotina and benthic foraminifera. These evidences provide critical paleoceanographic implications suggesting that intermediate water temperatures probably rose significantly during the EECO thus becoming too warm for this genus. Elevated ocean temperatures enhanced the rate of bacterial respiration and remineralization significantly thus resulting in ... |
author2 |
Luciani, V. D'Onofrio, R. Filippi, G. Moretti, S. |
format |
Article in Journal/Newspaper |
author |
Luciani V. D'Onofrio R. Filippi G. Moretti S. |
author_facet |
Luciani V. D'Onofrio R. Filippi G. Moretti S. |
author_sort |
Luciani V. |
title |
Which was the habitat of early Eocene planktic foraminifer Chiloguembelina? Stable isotope paleobiology from the Atlantic Ocean and implication for paleoceanographic reconstructions |
title_short |
Which was the habitat of early Eocene planktic foraminifer Chiloguembelina? Stable isotope paleobiology from the Atlantic Ocean and implication for paleoceanographic reconstructions |
title_full |
Which was the habitat of early Eocene planktic foraminifer Chiloguembelina? Stable isotope paleobiology from the Atlantic Ocean and implication for paleoceanographic reconstructions |
title_fullStr |
Which was the habitat of early Eocene planktic foraminifer Chiloguembelina? Stable isotope paleobiology from the Atlantic Ocean and implication for paleoceanographic reconstructions |
title_full_unstemmed |
Which was the habitat of early Eocene planktic foraminifer Chiloguembelina? Stable isotope paleobiology from the Atlantic Ocean and implication for paleoceanographic reconstructions |
title_sort |
which was the habitat of early eocene planktic foraminifer chiloguembelina? stable isotope paleobiology from the atlantic ocean and implication for paleoceanographic reconstructions |
publishDate |
2020 |
url |
http://hdl.handle.net/11392/2421164 https://doi.org/10.1016/j.gloplacha.2020.103216 https://www.sciencedirect.com/science/article/pii/S0921818120301077 |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000540178200011 volume:191 firstpage:103216-1 lastpage:103216-12 numberofpages:12 journal:GLOBAL AND PLANETARY CHANGE http://hdl.handle.net/11392/2421164 doi:10.1016/j.gloplacha.2020.103216 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85085271472 https://www.sciencedirect.com/science/article/pii/S0921818120301077 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.gloplacha.2020.103216 |
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Global and Planetary Change |
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191 |
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103216 |
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