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Coupled microbial bloom and oxygenation decline recorded by magnetofossils during the Palaeocene-Eocene Thermal Maximum

Chang, Liao; Harrison, R J; Zeng, Fan; Berndt, Thomas A.; Roberts, Andrew P.; Heslop, David; Zhao, Xiang

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Understanding marine environmental change and associated biological turnover across the Palaeocene–Eocene Thermal Maximum (PETM; ~56 Ma)—the most pronounced Cenozoic short-term global warming event—is important because of the potential role of the ocean in atmospheric CO2 drawdown, yet proxies for tracing marine productivity and oxygenation across the PETM are limited and results remain controversial. Here we show that a high-resolution record of South Atlantic Ocean bottom water oxygenation...[Show more]

dc.contributor.authorChang, Liao
dc.contributor.authorHarrison, R J
dc.contributor.authorZeng, Fan
dc.contributor.authorBerndt, Thomas A.
dc.contributor.authorRoberts, Andrew P.
dc.contributor.authorHeslop, David
dc.contributor.authorZhao, Xiang
dc.date.accessioned2020-01-10T04:43:19Z
dc.date.available2020-01-10T04:43:19Z
dc.identifier.issn2041-1723
dc.identifier.urihttp://hdl.handle.net/1885/196916
dc.description.abstractUnderstanding marine environmental change and associated biological turnover across the Palaeocene–Eocene Thermal Maximum (PETM; ~56 Ma)—the most pronounced Cenozoic short-term global warming event—is important because of the potential role of the ocean in atmospheric CO2 drawdown, yet proxies for tracing marine productivity and oxygenation across the PETM are limited and results remain controversial. Here we show that a high-resolution record of South Atlantic Ocean bottom water oxygenation can be extracted from exceptionally preserved magnetofossils—the bioinorganic magnetite nanocrystals produced by magnetotactic bacteria (MTB) using a new multiscale environmental magnetic approach. Our results suggest that a transient MTB bloom occurred due to increased nutrient supply. Bottom water oxygenation decreased gradually from the onset to the peak PETM. These observations provide a record of microbial response to the PETM and establish the value of magnetofossils as palaeoenvironmental indicators.
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherNature Research
dc.rights© The Author(s) 2018
dc.rights.urihttp://creativecommons.org/ licenses/by/4.0/
dc.sourceNature Communications
dc.titleCoupled microbial bloom and oxygenation decline recorded by magnetofossils during the Palaeocene-Eocene Thermal Maximum
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume9
dc.date.issued2018
local.identifier.absfor040406 - Magnetism and Palaeomagnetism
local.identifier.absfor040605 - Palaeoclimatology
local.identifier.ariespublicationu4485658xPUB1581
local.publisher.urlhttps://www.nature.com/
local.type.statusPublished Version
local.contributor.affiliationChang, Liao, Peking University
local.contributor.affiliationHarrison, R J, University of Cambridge
local.contributor.affiliationZeng, Fan, Peking University
local.contributor.affiliationBerndt, Thomas A., Peking University
local.contributor.affiliationRoberts, Andrew, College of Science, ANU
local.contributor.affiliationHeslop, David, College of Science, ANU
local.contributor.affiliationZhao, Xiang, College of Science, ANU
dc.relationhttp://purl.org/au-research/grants/arc/DP120103952
dc.relationhttp://purl.org/au-research/grants/arc/DP140104544
dc.relationhttp://purl.org/au-research/grants/arc/DP160100805
dc.relationhttp://purl.org/au-research/grants/arc/LE140100047
local.bibliographicCitation.issue4007
local.bibliographicCitation.startpage1
local.bibliographicCitation.lastpage9
local.identifier.doi10.1038/s41467-018-06472-y
local.identifier.absseo970104 - Expanding Knowledge in the Earth Sciences
local.identifier.absseo960399 - Climate and Climate Change not elsewhere classified
dc.date.updated2019-08-25T08:19:51Z
local.identifier.scopusID2-s2.0-85054058287
local.identifier.thomsonID000446113000009
dcterms.accessRightsOpen Access
dc.provenanceThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/ licenses/by/4.0/.
dc.rights.licenseCreative Commons Attribution 4.0 International License
CollectionsANU Research Publications

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