Oxygen and carbon isotope composition of modern planktic foraminifera and near-surface waters in the Fram Strait (Arctic Ocean) – a case study
The upper 500 m of the water column and the sediment surface along an E–W transect in the Fram Strait were sampled for recent planktic foraminifera. The δ18O and δ13C values of the tests are compared to the stable isotope composition of the water samples taken from the same depths, and related to th...
Published in: | Biogeosciences |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
COPERNICUS GESELLSCHAFT MBH
2015
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/37627/ https://epic.awi.de/id/eprint/37627/1/bg-12-1733-2015.pdf http://www.biogeosciences.net/12/1733/2015/bg-12-1733-2015.html https://hdl.handle.net/10013/epic.45261 https://hdl.handle.net/10013/epic.45261.d001 |
id |
ftawi:oai:epic.awi.de:37627 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:37627 2024-09-15T17:51:36+00:00 Oxygen and carbon isotope composition of modern planktic foraminifera and near-surface waters in the Fram Strait (Arctic Ocean) – a case study Pados, T. Spielhagen, Robert F. Bauch, D. Meyer, Hanno Segl, M. 2015 application/pdf https://epic.awi.de/id/eprint/37627/ https://epic.awi.de/id/eprint/37627/1/bg-12-1733-2015.pdf http://www.biogeosciences.net/12/1733/2015/bg-12-1733-2015.html https://hdl.handle.net/10013/epic.45261 https://hdl.handle.net/10013/epic.45261.d001 unknown COPERNICUS GESELLSCHAFT MBH https://epic.awi.de/id/eprint/37627/1/bg-12-1733-2015.pdf https://hdl.handle.net/10013/epic.45261.d001 Pados, T. , Spielhagen, R. F. , Bauch, D. , Meyer, H. orcid:0000-0003-4129-4706 and Segl, M. (2015) Oxygen and carbon isotope composition of modern planktic foraminifera and near-surface waters in the Fram Strait (Arctic Ocean) – a case study , Biogeosciences, 12 , pp. 1733-1752 . doi:10.5194/bg-12-1733-2015 <https://doi.org/10.5194/bg-12-1733-2015> , hdl:10013/epic.45261 EPIC3Biogeosciences, COPERNICUS GESELLSCHAFT MBH, 12, pp. 1733-1752, ISSN: 1726-4170 Article isiRev 2015 ftawi https://doi.org/10.5194/bg-12-1733-2015 2024-06-24T04:11:05Z The upper 500 m of the water column and the sediment surface along an E–W transect in the Fram Strait were sampled for recent planktic foraminifera. The δ18O and δ13C values of the tests are compared to the stable isotope composition of the water samples taken from the same depths, and related to the characteristics of the water column. The polar species Neogloboquadrina pachyderma clearly dominates the species assemblage in the Fram Strait in the early summer, while the subpolar Turborotalita quinqueloba accounts only for 5–23%. In this area the average depth of calcification of N. pachyderma lies between 70–150 m water depth, T. quinqueloba shows a similar range with 50–120 m water depth. The δ18O values of N. pachyderma show an average vital effect of about −1.5‰ compared to calculated equilibrium calcite values. Except for the upper ∼75 m, the vertical profiles of δ13C of the net-sampled shells are nearly parallel to the values measured in the water column with an average offset of −1.6‰ and −3.6‰ for N. pachyderma and T. quinqueloba, respectively. The discrepancy found in the upper ~75 m might indicate an influence of the "carbonate ion effect" on the carbon isotope incorporation in the tests. Oxygen and carbon isotopes from the sediment surface yield higher values than those from the water column for both species. This may be because specimens from the water column reflect a modern snapshot only, while tests from surface sediments record environmental parameters from the past ~1000 years. Article in Journal/Newspaper Arctic Arctic Ocean Foraminifera* Fram Strait Neogloboquadrina pachyderma Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Biogeosciences 12 6 1733 1752 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
The upper 500 m of the water column and the sediment surface along an E–W transect in the Fram Strait were sampled for recent planktic foraminifera. The δ18O and δ13C values of the tests are compared to the stable isotope composition of the water samples taken from the same depths, and related to the characteristics of the water column. The polar species Neogloboquadrina pachyderma clearly dominates the species assemblage in the Fram Strait in the early summer, while the subpolar Turborotalita quinqueloba accounts only for 5–23%. In this area the average depth of calcification of N. pachyderma lies between 70–150 m water depth, T. quinqueloba shows a similar range with 50–120 m water depth. The δ18O values of N. pachyderma show an average vital effect of about −1.5‰ compared to calculated equilibrium calcite values. Except for the upper ∼75 m, the vertical profiles of δ13C of the net-sampled shells are nearly parallel to the values measured in the water column with an average offset of −1.6‰ and −3.6‰ for N. pachyderma and T. quinqueloba, respectively. The discrepancy found in the upper ~75 m might indicate an influence of the "carbonate ion effect" on the carbon isotope incorporation in the tests. Oxygen and carbon isotopes from the sediment surface yield higher values than those from the water column for both species. This may be because specimens from the water column reflect a modern snapshot only, while tests from surface sediments record environmental parameters from the past ~1000 years. |
format |
Article in Journal/Newspaper |
author |
Pados, T. Spielhagen, Robert F. Bauch, D. Meyer, Hanno Segl, M. |
spellingShingle |
Pados, T. Spielhagen, Robert F. Bauch, D. Meyer, Hanno Segl, M. Oxygen and carbon isotope composition of modern planktic foraminifera and near-surface waters in the Fram Strait (Arctic Ocean) – a case study |
author_facet |
Pados, T. Spielhagen, Robert F. Bauch, D. Meyer, Hanno Segl, M. |
author_sort |
Pados, T. |
title |
Oxygen and carbon isotope composition of modern planktic foraminifera and near-surface waters in the Fram Strait (Arctic Ocean) – a case study |
title_short |
Oxygen and carbon isotope composition of modern planktic foraminifera and near-surface waters in the Fram Strait (Arctic Ocean) – a case study |
title_full |
Oxygen and carbon isotope composition of modern planktic foraminifera and near-surface waters in the Fram Strait (Arctic Ocean) – a case study |
title_fullStr |
Oxygen and carbon isotope composition of modern planktic foraminifera and near-surface waters in the Fram Strait (Arctic Ocean) – a case study |
title_full_unstemmed |
Oxygen and carbon isotope composition of modern planktic foraminifera and near-surface waters in the Fram Strait (Arctic Ocean) – a case study |
title_sort |
oxygen and carbon isotope composition of modern planktic foraminifera and near-surface waters in the fram strait (arctic ocean) – a case study |
publisher |
COPERNICUS GESELLSCHAFT MBH |
publishDate |
2015 |
url |
https://epic.awi.de/id/eprint/37627/ https://epic.awi.de/id/eprint/37627/1/bg-12-1733-2015.pdf http://www.biogeosciences.net/12/1733/2015/bg-12-1733-2015.html https://hdl.handle.net/10013/epic.45261 https://hdl.handle.net/10013/epic.45261.d001 |
genre |
Arctic Arctic Ocean Foraminifera* Fram Strait Neogloboquadrina pachyderma |
genre_facet |
Arctic Arctic Ocean Foraminifera* Fram Strait Neogloboquadrina pachyderma |
op_source |
EPIC3Biogeosciences, COPERNICUS GESELLSCHAFT MBH, 12, pp. 1733-1752, ISSN: 1726-4170 |
op_relation |
https://epic.awi.de/id/eprint/37627/1/bg-12-1733-2015.pdf https://hdl.handle.net/10013/epic.45261.d001 Pados, T. , Spielhagen, R. F. , Bauch, D. , Meyer, H. orcid:0000-0003-4129-4706 and Segl, M. (2015) Oxygen and carbon isotope composition of modern planktic foraminifera and near-surface waters in the Fram Strait (Arctic Ocean) – a case study , Biogeosciences, 12 , pp. 1733-1752 . doi:10.5194/bg-12-1733-2015 <https://doi.org/10.5194/bg-12-1733-2015> , hdl:10013/epic.45261 |
op_doi |
https://doi.org/10.5194/bg-12-1733-2015 |
container_title |
Biogeosciences |
container_volume |
12 |
container_issue |
6 |
container_start_page |
1733 |
op_container_end_page |
1752 |
_version_ |
1810293540140351488 |