Coccolithus pelagicus subsp. pelagicus versus Coccolithus pelagicus subsp. braarudii (Coccolithophore, Haptophyta): A proxy for surface subarctic Atlantic waters off Iberia during the last 200 kyr
A Multivariate Morphon Analysis (MMA) of Coccolithus pelagicus (s. l.) coccoliths was performed on 178 samples from an oceanic core recovered off the Portuguese margin (MD95-2040), in order to define the morphometric boundaries of its morphotypes and their behaviour during the last two glacial cycle...
Published in: | Marine Micropaleontology |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2006
|
Subjects: | |
Online Access: | http://hdl.handle.net/10400.13/3843 https://doi.org/10.1016/j.marmicro.2005.12.001 |
id |
ftunivmadeira:oai:digituma.uma.pt:10400.13/3843 |
---|---|
record_format |
openpolar |
spelling |
ftunivmadeira:oai:digituma.uma.pt:10400.13/3843 2023-06-11T04:14:07+02:00 Coccolithus pelagicus subsp. pelagicus versus Coccolithus pelagicus subsp. braarudii (Coccolithophore, Haptophyta): A proxy for surface subarctic Atlantic waters off Iberia during the last 200 kyr Narciso, Áurea Cachão, Mario Abreu, Lúcia de 2006 http://hdl.handle.net/10400.13/3843 https://doi.org/10.1016/j.marmicro.2005.12.001 eng eng Elsevier info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBD%2F8944%2F2002/PT Narciso, A., Cachão, M., & de Abreu, L. (2006). Coccolithus pelagicus subsp. pelagicus versus Coccolithus pelagicus subsp. braarudii (Coccolithophore, Haptophyta): a proxy for surface subarctic Atlantic waters off Iberia during the last 200 kyr. Marine Micropaleontology, 59(1), 15-34. https://doi.org/10.1016/j.marmicro.2005.12.001 http://hdl.handle.net/10400.13/3843 doi:10.1016/j.marmicro.2005.12.001 openAccess http://creativecommons.org/licenses/by/4.0/ Palaeoceanography Palaeoecology Heinrich Layer Western Iberia Coccolithus pelagicus (s. l.) C. pelagicus subsp. pelagicus C. pelagicus subsp. braarudii Faculdade de Ciências da Vida article 2006 ftunivmadeira https://doi.org/10.1016/j.marmicro.2005.12.001 2023-05-28T07:05:55Z A Multivariate Morphon Analysis (MMA) of Coccolithus pelagicus (s. l.) coccoliths was performed on 178 samples from an oceanic core recovered off the Portuguese margin (MD95-2040), in order to define the morphometric boundaries of its morphotypes and their behaviour during the last two glacial cycles. The recurrent occurrence of the smaller morphotype of this taxon, C. pelagicus subsp. pelagicus, was recognized for the first time off the Portuguese coast. Three sections, around Heinrich Layers 1 and 6 and Termination II-Eemian, were selected to establish high resolution comparisons between C. pelagicus subsp. pelagicus and C. pelagicus subsp. braarudii and two independent proxies for cold water masses: the records of the planktonic foraminifera Neogloboquadrina pachyderma (sinistral) and ice-rafted detritus (IRD). There is an overall negative correlation between C. pelagicus subsp. pelagicus and C. pelagicus subsp. braarudii as expressed by MMA Factor 1, the scores of which respond similarly to those of two non-cocolithophore proxies and consequently, is proposed as a calcareous nannoplankton proxy for the influence of subpolar waters in the region. Detailed analysis, however, showed occasional decoupling amongst these three proxies, which are used to highlight significant changes between the cooling–warming sequences of distinct events off Iberia. info:eu-repo/semantics/publishedVersion Article in Journal/Newspaper Neogloboquadrina pachyderma Planktonic foraminifera Subarctic Universidade da Madeira: DigitUMa Marine Micropaleontology 59 1 15 34 |
institution |
Open Polar |
collection |
Universidade da Madeira: DigitUMa |
op_collection_id |
ftunivmadeira |
language |
English |
topic |
Palaeoceanography Palaeoecology Heinrich Layer Western Iberia Coccolithus pelagicus (s. l.) C. pelagicus subsp. pelagicus C. pelagicus subsp. braarudii Faculdade de Ciências da Vida |
spellingShingle |
Palaeoceanography Palaeoecology Heinrich Layer Western Iberia Coccolithus pelagicus (s. l.) C. pelagicus subsp. pelagicus C. pelagicus subsp. braarudii Faculdade de Ciências da Vida Narciso, Áurea Cachão, Mario Abreu, Lúcia de Coccolithus pelagicus subsp. pelagicus versus Coccolithus pelagicus subsp. braarudii (Coccolithophore, Haptophyta): A proxy for surface subarctic Atlantic waters off Iberia during the last 200 kyr |
topic_facet |
Palaeoceanography Palaeoecology Heinrich Layer Western Iberia Coccolithus pelagicus (s. l.) C. pelagicus subsp. pelagicus C. pelagicus subsp. braarudii Faculdade de Ciências da Vida |
description |
A Multivariate Morphon Analysis (MMA) of Coccolithus pelagicus (s. l.) coccoliths was performed on 178 samples from an oceanic core recovered off the Portuguese margin (MD95-2040), in order to define the morphometric boundaries of its morphotypes and their behaviour during the last two glacial cycles. The recurrent occurrence of the smaller morphotype of this taxon, C. pelagicus subsp. pelagicus, was recognized for the first time off the Portuguese coast. Three sections, around Heinrich Layers 1 and 6 and Termination II-Eemian, were selected to establish high resolution comparisons between C. pelagicus subsp. pelagicus and C. pelagicus subsp. braarudii and two independent proxies for cold water masses: the records of the planktonic foraminifera Neogloboquadrina pachyderma (sinistral) and ice-rafted detritus (IRD). There is an overall negative correlation between C. pelagicus subsp. pelagicus and C. pelagicus subsp. braarudii as expressed by MMA Factor 1, the scores of which respond similarly to those of two non-cocolithophore proxies and consequently, is proposed as a calcareous nannoplankton proxy for the influence of subpolar waters in the region. Detailed analysis, however, showed occasional decoupling amongst these three proxies, which are used to highlight significant changes between the cooling–warming sequences of distinct events off Iberia. info:eu-repo/semantics/publishedVersion |
format |
Article in Journal/Newspaper |
author |
Narciso, Áurea Cachão, Mario Abreu, Lúcia de |
author_facet |
Narciso, Áurea Cachão, Mario Abreu, Lúcia de |
author_sort |
Narciso, Áurea |
title |
Coccolithus pelagicus subsp. pelagicus versus Coccolithus pelagicus subsp. braarudii (Coccolithophore, Haptophyta): A proxy for surface subarctic Atlantic waters off Iberia during the last 200 kyr |
title_short |
Coccolithus pelagicus subsp. pelagicus versus Coccolithus pelagicus subsp. braarudii (Coccolithophore, Haptophyta): A proxy for surface subarctic Atlantic waters off Iberia during the last 200 kyr |
title_full |
Coccolithus pelagicus subsp. pelagicus versus Coccolithus pelagicus subsp. braarudii (Coccolithophore, Haptophyta): A proxy for surface subarctic Atlantic waters off Iberia during the last 200 kyr |
title_fullStr |
Coccolithus pelagicus subsp. pelagicus versus Coccolithus pelagicus subsp. braarudii (Coccolithophore, Haptophyta): A proxy for surface subarctic Atlantic waters off Iberia during the last 200 kyr |
title_full_unstemmed |
Coccolithus pelagicus subsp. pelagicus versus Coccolithus pelagicus subsp. braarudii (Coccolithophore, Haptophyta): A proxy for surface subarctic Atlantic waters off Iberia during the last 200 kyr |
title_sort |
coccolithus pelagicus subsp. pelagicus versus coccolithus pelagicus subsp. braarudii (coccolithophore, haptophyta): a proxy for surface subarctic atlantic waters off iberia during the last 200 kyr |
publisher |
Elsevier |
publishDate |
2006 |
url |
http://hdl.handle.net/10400.13/3843 https://doi.org/10.1016/j.marmicro.2005.12.001 |
genre |
Neogloboquadrina pachyderma Planktonic foraminifera Subarctic |
genre_facet |
Neogloboquadrina pachyderma Planktonic foraminifera Subarctic |
op_relation |
info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBD%2F8944%2F2002/PT Narciso, A., Cachão, M., & de Abreu, L. (2006). Coccolithus pelagicus subsp. pelagicus versus Coccolithus pelagicus subsp. braarudii (Coccolithophore, Haptophyta): a proxy for surface subarctic Atlantic waters off Iberia during the last 200 kyr. Marine Micropaleontology, 59(1), 15-34. https://doi.org/10.1016/j.marmicro.2005.12.001 http://hdl.handle.net/10400.13/3843 doi:10.1016/j.marmicro.2005.12.001 |
op_rights |
openAccess http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1016/j.marmicro.2005.12.001 |
container_title |
Marine Micropaleontology |
container_volume |
59 |
container_issue |
1 |
container_start_page |
15 |
op_container_end_page |
34 |
_version_ |
1768391900028469248 |