Isotopic disequilibrium in Globigerina bulloides and carbon isotope response to productivity increase in Southern Ocean

Oxygen and carbon isotope ratios in planktonic foraminifera Globigerina bulloides collected from tow samples along a transect from the equatorial Indian ocean to the Southern Ocean (45°E and 80°E and 10°N to 53°S) were analysed and compared with the equilibrium δ18O and δ13C values of calcite calcul...

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Published in:Scientific Reports
Main Authors: Prasanna, K., Ghosh, Prosenjit, Bhattacharya, S. K., Mohan, K., Anilkumar, N.
Format: Text
Language:English
Published: Nature Publishing Group 2016
Subjects:
Online Access:http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4763226/
http://www.ncbi.nlm.nih.gov/pubmed/26903274
https://doi.org/10.1038/srep21533
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spelling ftpubmed:oai:pubmedcentral.nih.gov:4763226 2023-05-15T18:00:55+02:00 Isotopic disequilibrium in Globigerina bulloides and carbon isotope response to productivity increase in Southern Ocean Prasanna, K. Ghosh, Prosenjit Bhattacharya, S. K. Mohan, K. Anilkumar, N. 2016-02-23 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4763226/ http://www.ncbi.nlm.nih.gov/pubmed/26903274 https://doi.org/10.1038/srep21533 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4763226/ http://www.ncbi.nlm.nih.gov/pubmed/26903274 http://dx.doi.org/10.1038/srep21533 Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ CC-BY Article Text 2016 ftpubmed https://doi.org/10.1038/srep21533 2016-03-06T01:33:51Z Oxygen and carbon isotope ratios in planktonic foraminifera Globigerina bulloides collected from tow samples along a transect from the equatorial Indian ocean to the Southern Ocean (45°E and 80°E and 10°N to 53°S) were analysed and compared with the equilibrium δ18O and δ13C values of calcite calculated using the temperature and isotopic composition of the water column. The results agree within ~0.25‰ for the region between 10°N and 40°S and 75–200 m water depth which is considered to be the habitat of Globigerina bulloides. Further south (from 40°S to 55°S), however, the measured δ18O and δ13C values are higher than the expected values by ~2‰ and ~1‰ respectively. These enrichments can be attributed to either a ‘vital effect’ or a higher calcification rate. An interesting pattern of increase in the δ13C(DIC) value of the surface water with latitude is observed between 35°S and~ 60°S, with a peak at~ 42°S. This can be caused by increased organic matter production and associated removal. A simple model accounting for the increase in the δ13C(DIC) values is proposed which fits well with the observed chlorophyll abundance as a function of latitude. Text Planktonic foraminifera Southern Ocean PubMed Central (PMC) Indian Southern Ocean Scientific Reports 6 1
institution Open Polar
collection PubMed Central (PMC)
op_collection_id ftpubmed
language English
topic Article
spellingShingle Article
Prasanna, K.
Ghosh, Prosenjit
Bhattacharya, S. K.
Mohan, K.
Anilkumar, N.
Isotopic disequilibrium in Globigerina bulloides and carbon isotope response to productivity increase in Southern Ocean
topic_facet Article
description Oxygen and carbon isotope ratios in planktonic foraminifera Globigerina bulloides collected from tow samples along a transect from the equatorial Indian ocean to the Southern Ocean (45°E and 80°E and 10°N to 53°S) were analysed and compared with the equilibrium δ18O and δ13C values of calcite calculated using the temperature and isotopic composition of the water column. The results agree within ~0.25‰ for the region between 10°N and 40°S and 75–200 m water depth which is considered to be the habitat of Globigerina bulloides. Further south (from 40°S to 55°S), however, the measured δ18O and δ13C values are higher than the expected values by ~2‰ and ~1‰ respectively. These enrichments can be attributed to either a ‘vital effect’ or a higher calcification rate. An interesting pattern of increase in the δ13C(DIC) value of the surface water with latitude is observed between 35°S and~ 60°S, with a peak at~ 42°S. This can be caused by increased organic matter production and associated removal. A simple model accounting for the increase in the δ13C(DIC) values is proposed which fits well with the observed chlorophyll abundance as a function of latitude.
format Text
author Prasanna, K.
Ghosh, Prosenjit
Bhattacharya, S. K.
Mohan, K.
Anilkumar, N.
author_facet Prasanna, K.
Ghosh, Prosenjit
Bhattacharya, S. K.
Mohan, K.
Anilkumar, N.
author_sort Prasanna, K.
title Isotopic disequilibrium in Globigerina bulloides and carbon isotope response to productivity increase in Southern Ocean
title_short Isotopic disequilibrium in Globigerina bulloides and carbon isotope response to productivity increase in Southern Ocean
title_full Isotopic disequilibrium in Globigerina bulloides and carbon isotope response to productivity increase in Southern Ocean
title_fullStr Isotopic disequilibrium in Globigerina bulloides and carbon isotope response to productivity increase in Southern Ocean
title_full_unstemmed Isotopic disequilibrium in Globigerina bulloides and carbon isotope response to productivity increase in Southern Ocean
title_sort isotopic disequilibrium in globigerina bulloides and carbon isotope response to productivity increase in southern ocean
publisher Nature Publishing Group
publishDate 2016
url http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4763226/
http://www.ncbi.nlm.nih.gov/pubmed/26903274
https://doi.org/10.1038/srep21533
geographic Indian
Southern Ocean
geographic_facet Indian
Southern Ocean
genre Planktonic foraminifera
Southern Ocean
genre_facet Planktonic foraminifera
Southern Ocean
op_relation http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4763226/
http://www.ncbi.nlm.nih.gov/pubmed/26903274
http://dx.doi.org/10.1038/srep21533
op_rights Copyright © 2016, Macmillan Publishers Limited
http://creativecommons.org/licenses/by/4.0/
This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
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op_doi https://doi.org/10.1038/srep21533
container_title Scientific Reports
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