Morphological abnormalities of planktonic foraminiferal tests in the SW pacific ocean over the last 550ky
This project was funded by “FAR 2012-2014” grants of the University of Pavia (Italy). The paper focuses on the occurrence of morphologically abnormal specimens of planktonic foraminifera observed over the last 550ky in IMAGES core MD 97-2114 (East of New Zealand, SW Pacific). Abnormal tests occurred...
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ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/9431 2023-07-02T03:33:30+02:00 Morphological abnormalities of planktonic foraminiferal tests in the SW pacific ocean over the last 550ky Mancin, Nicoletta Darling, Kate University of St Andrews. School of Geography and Geosciences 2016-09-05 application/pdf http://hdl.handle.net/10023/9431 https://doi.org/10.1016/j.marmicro.2015.08.003 eng eng Marine Micropaleontology Mancin , N & Darling , K 2015 , ' Morphological abnormalities of planktonic foraminiferal tests in the SW pacific ocean over the last 550ky ' , Marine Micropaleontology , vol. 120 , pp. 1-19 . https://doi.org/10.1016/j.marmicro.2015.08.003 0377-8398 PURE: 215400794 PURE UUID: 6228ae00-05e0-4f2d-93ec-81b0adce5c79 RIS: urn:32216041D1FE03417F6429B7BCE46750 Scopus: 84941265930 WOS: 000365064900001 http://hdl.handle.net/10023/9431 https://doi.org/10.1016/j.marmicro.2015.08.003 Copyright © 2015 Published by Elsevier B.V. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://dx.doi.org/10.1016/j.marmicro.2015.08.003 Planktonic foraminifera Abnormal test Environmental stressors Pleistocene SW pacific GE Environmental Sciences DAS GE Journal article 2016 ftstandrewserep https://doi.org/10.1016/j.marmicro.2015.08.003 2023-06-13T18:29:29Z This project was funded by “FAR 2012-2014” grants of the University of Pavia (Italy). The paper focuses on the occurrence of morphologically abnormal specimens of planktonic foraminifera observed over the last 550ky in IMAGES core MD 97-2114 (East of New Zealand, SW Pacific). Abnormal tests occurred throughout the entire record in all the morphospecies characterising the assemblages but were relatively rare, with percentages not exceeding 1.5% of the total assemblage. No mass abnormality events were found. A range of malformations were observed from slight deformity with smaller or overdeveloped chambers to more severe deformity, with misplaced chambers, distorted spirals or double tests forming twinned individuals. They exhibited several different categories of morphological abnormalities, even within the same sample. Test abnormalities were most abundant in the morphospecies Globorotalia inflata, Globigerina bulloides and Orbulina universa and were characterised by a long-term decreasing trend up core with an alternating % abundance pattern at the glacial to interglacial scale between MIS 14 to MIS 8, recording the highest percentages during the interglacials. Normalised total abundance and abnormal abundance curves co-varied very closely for G. bulloides and O. universa, but for G. inflata two opposing excursions were observed during MIS 13 and 6 which may be linked to water column states. Although abnormal numbers were proportionately low, there appears to be a “natural” background number of malformations in the G. inflata population through time. There was no relationship between volcanic ash production and test abnormalities. Postprint Peer reviewed Article in Journal/Newspaper Planktonic foraminifera University of St Andrews: Digital Research Repository New Zealand Pacific Marine Micropaleontology 120 1 19 |
institution |
Open Polar |
collection |
University of St Andrews: Digital Research Repository |
op_collection_id |
ftstandrewserep |
language |
English |
topic |
Planktonic foraminifera Abnormal test Environmental stressors Pleistocene SW pacific GE Environmental Sciences DAS GE |
spellingShingle |
Planktonic foraminifera Abnormal test Environmental stressors Pleistocene SW pacific GE Environmental Sciences DAS GE Mancin, Nicoletta Darling, Kate Morphological abnormalities of planktonic foraminiferal tests in the SW pacific ocean over the last 550ky |
topic_facet |
Planktonic foraminifera Abnormal test Environmental stressors Pleistocene SW pacific GE Environmental Sciences DAS GE |
description |
This project was funded by “FAR 2012-2014” grants of the University of Pavia (Italy). The paper focuses on the occurrence of morphologically abnormal specimens of planktonic foraminifera observed over the last 550ky in IMAGES core MD 97-2114 (East of New Zealand, SW Pacific). Abnormal tests occurred throughout the entire record in all the morphospecies characterising the assemblages but were relatively rare, with percentages not exceeding 1.5% of the total assemblage. No mass abnormality events were found. A range of malformations were observed from slight deformity with smaller or overdeveloped chambers to more severe deformity, with misplaced chambers, distorted spirals or double tests forming twinned individuals. They exhibited several different categories of morphological abnormalities, even within the same sample. Test abnormalities were most abundant in the morphospecies Globorotalia inflata, Globigerina bulloides and Orbulina universa and were characterised by a long-term decreasing trend up core with an alternating % abundance pattern at the glacial to interglacial scale between MIS 14 to MIS 8, recording the highest percentages during the interglacials. Normalised total abundance and abnormal abundance curves co-varied very closely for G. bulloides and O. universa, but for G. inflata two opposing excursions were observed during MIS 13 and 6 which may be linked to water column states. Although abnormal numbers were proportionately low, there appears to be a “natural” background number of malformations in the G. inflata population through time. There was no relationship between volcanic ash production and test abnormalities. Postprint Peer reviewed |
author2 |
University of St Andrews. School of Geography and Geosciences |
format |
Article in Journal/Newspaper |
author |
Mancin, Nicoletta Darling, Kate |
author_facet |
Mancin, Nicoletta Darling, Kate |
author_sort |
Mancin, Nicoletta |
title |
Morphological abnormalities of planktonic foraminiferal tests in the SW pacific ocean over the last 550ky |
title_short |
Morphological abnormalities of planktonic foraminiferal tests in the SW pacific ocean over the last 550ky |
title_full |
Morphological abnormalities of planktonic foraminiferal tests in the SW pacific ocean over the last 550ky |
title_fullStr |
Morphological abnormalities of planktonic foraminiferal tests in the SW pacific ocean over the last 550ky |
title_full_unstemmed |
Morphological abnormalities of planktonic foraminiferal tests in the SW pacific ocean over the last 550ky |
title_sort |
morphological abnormalities of planktonic foraminiferal tests in the sw pacific ocean over the last 550ky |
publishDate |
2016 |
url |
http://hdl.handle.net/10023/9431 https://doi.org/10.1016/j.marmicro.2015.08.003 |
geographic |
New Zealand Pacific |
geographic_facet |
New Zealand Pacific |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
Marine Micropaleontology Mancin , N & Darling , K 2015 , ' Morphological abnormalities of planktonic foraminiferal tests in the SW pacific ocean over the last 550ky ' , Marine Micropaleontology , vol. 120 , pp. 1-19 . https://doi.org/10.1016/j.marmicro.2015.08.003 0377-8398 PURE: 215400794 PURE UUID: 6228ae00-05e0-4f2d-93ec-81b0adce5c79 RIS: urn:32216041D1FE03417F6429B7BCE46750 Scopus: 84941265930 WOS: 000365064900001 http://hdl.handle.net/10023/9431 https://doi.org/10.1016/j.marmicro.2015.08.003 |
op_rights |
Copyright © 2015 Published by Elsevier B.V. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://dx.doi.org/10.1016/j.marmicro.2015.08.003 |
op_doi |
https://doi.org/10.1016/j.marmicro.2015.08.003 |
container_title |
Marine Micropaleontology |
container_volume |
120 |
container_start_page |
1 |
op_container_end_page |
19 |
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1770273477709791232 |