Geochemical imprints of genotypic variants of Globigerina bulloides in the Arabian Sea
Planktonic foraminifera record oceanic conditions in their shell geochemistry. Many palaeoenvironmental studies have used fossil planktonic foraminifera to constrain past seawater properties by defining species based on their shell morphology. Recent genetic studies, however, have identified ecologi...
Published in: | Paleoceanography |
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Main Authors: | , , , , , , , , , , , , |
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2016
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Online Access: | https://research.vu.nl/en/publications/66c073e5-982b-4f99-88de-825703098d8e https://doi.org/10.1002/2016PA002947 https://hdl.handle.net/1871.1/66c073e5-982b-4f99-88de-825703098d8e http://www.scopus.com/inward/record.url?scp=84995603564&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=84995603564&partnerID=8YFLogxK |
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ftvuamstcris:oai:research.vu.nl:publications/66c073e5-982b-4f99-88de-825703098d8e 2024-06-23T07:56:15+00:00 Geochemical imprints of genotypic variants of Globigerina bulloides in the Arabian Sea Sadekov, Aleksey Yu Darling, Kate F. Ishimura, Toyoho Wade, Christopher M. Kimoto, Katsunori Singh, Arun Deo Anand, Pallavi Kroon, Dick Jung, Simon Ganssen, Gerald Ganeshram, Raja Tsunogai, Urumu Elderfield, Henry 2016-10-01 https://research.vu.nl/en/publications/66c073e5-982b-4f99-88de-825703098d8e https://doi.org/10.1002/2016PA002947 https://hdl.handle.net/1871.1/66c073e5-982b-4f99-88de-825703098d8e http://www.scopus.com/inward/record.url?scp=84995603564&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=84995603564&partnerID=8YFLogxK eng eng https://research.vu.nl/en/publications/66c073e5-982b-4f99-88de-825703098d8e info:eu-repo/semantics/openAccess Sadekov , A Y , Darling , K F , Ishimura , T , Wade , C M , Kimoto , K , Singh , A D , Anand , P , Kroon , D , Jung , S , Ganssen , G , Ganeshram , R , Tsunogai , U & Elderfield , H 2016 , ' Geochemical imprints of genotypic variants of Globigerina bulloides in the Arabian Sea ' , Paleoceanography , vol. 31 , no. 10 , pp. 1440-1452 . https://doi.org/10.1002/2016PA002947 genetic variability geochemistry Mg/Ca thermometry paleoclimate planktonic foraminifera proxy reconstructions /dk/atira/pure/sustainabledevelopmentgoals/zero_hunger name=SDG 2 - Zero Hunger /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water article 2016 ftvuamstcris https://doi.org/10.1002/2016PA002947 2024-06-06T00:12:07Z Planktonic foraminifera record oceanic conditions in their shell geochemistry. Many palaeoenvironmental studies have used fossil planktonic foraminifera to constrain past seawater properties by defining species based on their shell morphology. Recent genetic studies, however, have identified ecologically distinct genotypes within traditionally recognized morphospecies, signaling potential repercussions for palaeoclimate reconstructions. Here we demonstrate how the presence of Globigerina bulloides cryptic genotypes in the Arabian Sea may influence geochemical signals of living and fossil assemblages of these morphospecies. We have identified two distinct genotypes of G. bulloides with either cool water (type-II) or warm water (type-I) temperature preferences in the Western Arabian Sea. We accompany these genetic studies with analyses of Mg/Ca and stable oxygen isotope (δ 18 O) compositions of individual G. bulloides shells. Both Mg/Ca and δ 18 O values display bimodal distribution patterns. The distribution of Mg/Ca values cannot be simply explained by seawater parameters, and we attribute it to genotype-specific biological controls on the shell geochemistry. The wide range of δ 18 O values in the fossil assemblage also suggests that similar controls likely influence this proxy in addition to environmental parameters. However, the magnitude of this effect on the δ 18 O signals is not clear from our data set, and further work is needed to clarify this. We also discuss current evidence of potential genotype-specific geochemical signals in published data on G. bulloides geochemistry and other planktonic foraminiferal species. We conclude that significant caution should be taken when utilizing G. bulloides geochemistry for paleoclimate reconstruction in the regions with upwelling activity or oceanographic fronts. Article in Journal/Newspaper Planktonic foraminifera Vrije Universiteit Amsterdam (VU): Research Portal Paleoceanography 31 10 1440 1452 |
institution |
Open Polar |
collection |
Vrije Universiteit Amsterdam (VU): Research Portal |
op_collection_id |
ftvuamstcris |
language |
English |
topic |
genetic variability geochemistry Mg/Ca thermometry paleoclimate planktonic foraminifera proxy reconstructions /dk/atira/pure/sustainabledevelopmentgoals/zero_hunger name=SDG 2 - Zero Hunger /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
spellingShingle |
genetic variability geochemistry Mg/Ca thermometry paleoclimate planktonic foraminifera proxy reconstructions /dk/atira/pure/sustainabledevelopmentgoals/zero_hunger name=SDG 2 - Zero Hunger /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water Sadekov, Aleksey Yu Darling, Kate F. Ishimura, Toyoho Wade, Christopher M. Kimoto, Katsunori Singh, Arun Deo Anand, Pallavi Kroon, Dick Jung, Simon Ganssen, Gerald Ganeshram, Raja Tsunogai, Urumu Elderfield, Henry Geochemical imprints of genotypic variants of Globigerina bulloides in the Arabian Sea |
topic_facet |
genetic variability geochemistry Mg/Ca thermometry paleoclimate planktonic foraminifera proxy reconstructions /dk/atira/pure/sustainabledevelopmentgoals/zero_hunger name=SDG 2 - Zero Hunger /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
description |
Planktonic foraminifera record oceanic conditions in their shell geochemistry. Many palaeoenvironmental studies have used fossil planktonic foraminifera to constrain past seawater properties by defining species based on their shell morphology. Recent genetic studies, however, have identified ecologically distinct genotypes within traditionally recognized morphospecies, signaling potential repercussions for palaeoclimate reconstructions. Here we demonstrate how the presence of Globigerina bulloides cryptic genotypes in the Arabian Sea may influence geochemical signals of living and fossil assemblages of these morphospecies. We have identified two distinct genotypes of G. bulloides with either cool water (type-II) or warm water (type-I) temperature preferences in the Western Arabian Sea. We accompany these genetic studies with analyses of Mg/Ca and stable oxygen isotope (δ 18 O) compositions of individual G. bulloides shells. Both Mg/Ca and δ 18 O values display bimodal distribution patterns. The distribution of Mg/Ca values cannot be simply explained by seawater parameters, and we attribute it to genotype-specific biological controls on the shell geochemistry. The wide range of δ 18 O values in the fossil assemblage also suggests that similar controls likely influence this proxy in addition to environmental parameters. However, the magnitude of this effect on the δ 18 O signals is not clear from our data set, and further work is needed to clarify this. We also discuss current evidence of potential genotype-specific geochemical signals in published data on G. bulloides geochemistry and other planktonic foraminiferal species. We conclude that significant caution should be taken when utilizing G. bulloides geochemistry for paleoclimate reconstruction in the regions with upwelling activity or oceanographic fronts. |
format |
Article in Journal/Newspaper |
author |
Sadekov, Aleksey Yu Darling, Kate F. Ishimura, Toyoho Wade, Christopher M. Kimoto, Katsunori Singh, Arun Deo Anand, Pallavi Kroon, Dick Jung, Simon Ganssen, Gerald Ganeshram, Raja Tsunogai, Urumu Elderfield, Henry |
author_facet |
Sadekov, Aleksey Yu Darling, Kate F. Ishimura, Toyoho Wade, Christopher M. Kimoto, Katsunori Singh, Arun Deo Anand, Pallavi Kroon, Dick Jung, Simon Ganssen, Gerald Ganeshram, Raja Tsunogai, Urumu Elderfield, Henry |
author_sort |
Sadekov, Aleksey Yu |
title |
Geochemical imprints of genotypic variants of Globigerina bulloides in the Arabian Sea |
title_short |
Geochemical imprints of genotypic variants of Globigerina bulloides in the Arabian Sea |
title_full |
Geochemical imprints of genotypic variants of Globigerina bulloides in the Arabian Sea |
title_fullStr |
Geochemical imprints of genotypic variants of Globigerina bulloides in the Arabian Sea |
title_full_unstemmed |
Geochemical imprints of genotypic variants of Globigerina bulloides in the Arabian Sea |
title_sort |
geochemical imprints of genotypic variants of globigerina bulloides in the arabian sea |
publishDate |
2016 |
url |
https://research.vu.nl/en/publications/66c073e5-982b-4f99-88de-825703098d8e https://doi.org/10.1002/2016PA002947 https://hdl.handle.net/1871.1/66c073e5-982b-4f99-88de-825703098d8e http://www.scopus.com/inward/record.url?scp=84995603564&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=84995603564&partnerID=8YFLogxK |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Sadekov , A Y , Darling , K F , Ishimura , T , Wade , C M , Kimoto , K , Singh , A D , Anand , P , Kroon , D , Jung , S , Ganssen , G , Ganeshram , R , Tsunogai , U & Elderfield , H 2016 , ' Geochemical imprints of genotypic variants of Globigerina bulloides in the Arabian Sea ' , Paleoceanography , vol. 31 , no. 10 , pp. 1440-1452 . https://doi.org/10.1002/2016PA002947 |
op_relation |
https://research.vu.nl/en/publications/66c073e5-982b-4f99-88de-825703098d8e |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2016PA002947 |
container_title |
Paleoceanography |
container_volume |
31 |
container_issue |
10 |
container_start_page |
1440 |
op_container_end_page |
1452 |
_version_ |
1802649232555900928 |