Reconstructing calcification in ancient coccolithophores: Individual coccolith weight and morphology of Coccolithus pelagicus (sensu lato)
We have adapted an existing method to estimate coccolith calcite weight using birefringence (Beaufort,2005) to suit the large coccoliths of Coccolithus pelagicus , which are only partially birefringent under crosspolarisedlight microscopy. Fossil and sediment trap material from the South Tasman Rise...
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Online Access: | https://doi.org/10.1016/j.marmicro.2012.04.005 http://ecite.utas.edu.au/77927 |
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ftunivtasecite:oai:ecite.utas.edu.au:77927 2023-05-15T18:25:31+02:00 Reconstructing calcification in ancient coccolithophores: Individual coccolith weight and morphology of Coccolithus pelagicus (sensu lato) Cubillos, JC Henderiks, J Beaufort, L Howard, WR Hallegraeff, GM 2012 https://doi.org/10.1016/j.marmicro.2012.04.005 http://ecite.utas.edu.au/77927 en eng Elsevier Science Bv http://dx.doi.org/10.1016/j.marmicro.2012.04.005 http://purl.org/au-research/grants/arc/DP1093801 Cubillos, JC and Henderiks, J and Beaufort, L and Howard, WR and Hallegraeff, GM, Reconstructing calcification in ancient coccolithophores: Individual coccolith weight and morphology of Coccolithus pelagicus (sensu lato), Marine Micropaleontology, 92-93 pp. 29-39. ISSN 0377-8398 (2012) [Refereed Article] http://ecite.utas.edu.au/77927 Biological Sciences Plant Biology Phycology (incl. Marine Grasses) Refereed Article PeerReviewed 2012 ftunivtasecite https://doi.org/10.1016/j.marmicro.2012.04.005 2019-12-13T21:43:53Z We have adapted an existing method to estimate coccolith calcite weight using birefringence (Beaufort,2005) to suit the large coccoliths of Coccolithus pelagicus , which are only partially birefringent under crosspolarisedlight microscopy. Fossil and sediment trap material from the South Tasman Rise region of theSouthern Ocean was used for calibration and validation. Our approach was tested with only the coccolith centralarea (CA) considered for measurement, to avoid relying on the less robust proximal shields. Thus our resultsare relative and intend to quantify intra-specific variations in volumetric calcite weight, expressed as aWeight Index (WI). Our results were overall consistent with mass estimation based on distal shield lengths.However, the WI approach clearly has the advantage in exploring allometric scaling between coccolith sizeand weight, as well as in measuring the degree of calcification in similarly sized morphotypes. CombiningWI and morphometry data (distal shield length, DSL), we demonstrate subtle, but statistically significantchanges in shape and thus calcification degree both within and between the tested Coccolithus populations.Most strikingly, it appears that modern Coccolithus populations in the Southern Ocean are, on average,more heavily calcified than their fossil counterparts. Article in Journal/Newspaper Southern Ocean eCite UTAS (University of Tasmania) South Tasman Rise ENVELOPE(148.000,148.000,-47.500,-47.500) Southern Ocean Marine Micropaleontology 92-93 29 39 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Biological Sciences Plant Biology Phycology (incl. Marine Grasses) |
spellingShingle |
Biological Sciences Plant Biology Phycology (incl. Marine Grasses) Cubillos, JC Henderiks, J Beaufort, L Howard, WR Hallegraeff, GM Reconstructing calcification in ancient coccolithophores: Individual coccolith weight and morphology of Coccolithus pelagicus (sensu lato) |
topic_facet |
Biological Sciences Plant Biology Phycology (incl. Marine Grasses) |
description |
We have adapted an existing method to estimate coccolith calcite weight using birefringence (Beaufort,2005) to suit the large coccoliths of Coccolithus pelagicus , which are only partially birefringent under crosspolarisedlight microscopy. Fossil and sediment trap material from the South Tasman Rise region of theSouthern Ocean was used for calibration and validation. Our approach was tested with only the coccolith centralarea (CA) considered for measurement, to avoid relying on the less robust proximal shields. Thus our resultsare relative and intend to quantify intra-specific variations in volumetric calcite weight, expressed as aWeight Index (WI). Our results were overall consistent with mass estimation based on distal shield lengths.However, the WI approach clearly has the advantage in exploring allometric scaling between coccolith sizeand weight, as well as in measuring the degree of calcification in similarly sized morphotypes. CombiningWI and morphometry data (distal shield length, DSL), we demonstrate subtle, but statistically significantchanges in shape and thus calcification degree both within and between the tested Coccolithus populations.Most strikingly, it appears that modern Coccolithus populations in the Southern Ocean are, on average,more heavily calcified than their fossil counterparts. |
format |
Article in Journal/Newspaper |
author |
Cubillos, JC Henderiks, J Beaufort, L Howard, WR Hallegraeff, GM |
author_facet |
Cubillos, JC Henderiks, J Beaufort, L Howard, WR Hallegraeff, GM |
author_sort |
Cubillos, JC |
title |
Reconstructing calcification in ancient coccolithophores: Individual coccolith weight and morphology of Coccolithus pelagicus (sensu lato) |
title_short |
Reconstructing calcification in ancient coccolithophores: Individual coccolith weight and morphology of Coccolithus pelagicus (sensu lato) |
title_full |
Reconstructing calcification in ancient coccolithophores: Individual coccolith weight and morphology of Coccolithus pelagicus (sensu lato) |
title_fullStr |
Reconstructing calcification in ancient coccolithophores: Individual coccolith weight and morphology of Coccolithus pelagicus (sensu lato) |
title_full_unstemmed |
Reconstructing calcification in ancient coccolithophores: Individual coccolith weight and morphology of Coccolithus pelagicus (sensu lato) |
title_sort |
reconstructing calcification in ancient coccolithophores: individual coccolith weight and morphology of coccolithus pelagicus (sensu lato) |
publisher |
Elsevier Science Bv |
publishDate |
2012 |
url |
https://doi.org/10.1016/j.marmicro.2012.04.005 http://ecite.utas.edu.au/77927 |
long_lat |
ENVELOPE(148.000,148.000,-47.500,-47.500) |
geographic |
South Tasman Rise Southern Ocean |
geographic_facet |
South Tasman Rise Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
http://dx.doi.org/10.1016/j.marmicro.2012.04.005 http://purl.org/au-research/grants/arc/DP1093801 Cubillos, JC and Henderiks, J and Beaufort, L and Howard, WR and Hallegraeff, GM, Reconstructing calcification in ancient coccolithophores: Individual coccolith weight and morphology of Coccolithus pelagicus (sensu lato), Marine Micropaleontology, 92-93 pp. 29-39. ISSN 0377-8398 (2012) [Refereed Article] http://ecite.utas.edu.au/77927 |
op_doi |
https://doi.org/10.1016/j.marmicro.2012.04.005 |
container_title |
Marine Micropaleontology |
container_volume |
92-93 |
container_start_page |
29 |
op_container_end_page |
39 |
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1766207033766313984 |