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...
Published in: | Scientific Reports |
---|---|
Main Authors: | , , , , |
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 |
id |
ftpubmed:oai:pubmedcentral.nih.gov:4763226 |
---|---|
record_format |
openpolar |
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/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/srep21533 |
container_title |
Scientific Reports |
container_volume |
6 |
container_issue |
1 |
_version_ |
1766170197822013440 |