The incorporation of zinc and iron into the frustule of the marine diatom Thalassiosira pseudonana
Zinc and iron uptake experiments were conducted with the marine diatom Thalassosira pseudonana , to investigate whether Zn and Fe are incorporated into the frustule of this diatom. Our results show that the uptake and deposition of Zn into opal has a sigmoidal relationship with the free Zn 2+ concen...
Published in: | Limnology and Oceanography |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2000
|
Subjects: | |
Online Access: | http://dx.doi.org/10.4319/lo.2000.45.7.1517 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2000.45.7.1517 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2000.45.7.1517 |
id |
crwiley:10.4319/lo.2000.45.7.1517 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.4319/lo.2000.45.7.1517 2024-09-15T17:47:23+00:00 The incorporation of zinc and iron into the frustule of the marine diatom Thalassiosira pseudonana Ellwood, Michael J. Hunter, Keith A. 2000 http://dx.doi.org/10.4319/lo.2000.45.7.1517 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2000.45.7.1517 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2000.45.7.1517 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 45, issue 7, page 1517-1524 ISSN 0024-3590 1939-5590 journal-article 2000 crwiley https://doi.org/10.4319/lo.2000.45.7.1517 2024-08-30T04:10:51Z Zinc and iron uptake experiments were conducted with the marine diatom Thalassosira pseudonana , to investigate whether Zn and Fe are incorporated into the frustule of this diatom. Our results show that the uptake and deposition of Zn into opal has a sigmoidal relationship with the free Zn 2+ concentration of the culture medium. The amount of Zn incorporated into the opal represents only 1–3% of the total amount of Zn taken up by the diatom; however, the exact reasons for Zn incorporation into the opal are not known. Even so, the consistent relationship between Zn levels in the opal and the culture medium suggests that fossil diatoms may be used as a recorder for historical changes in oceanic free Zn 2+ concentrations. These results also demonstrate that the Zn:Si(OH) 4 relationship observed in the Pacific and Antarctic Oceans is not a result of Zn released from biogenic opal. Fe uptake experiments also revealed that Fe is incorporated into diatom opal; however, the amount incorporated appears to be regulated by the diatom and did not increase with increasing Fe concentration within the diatom culture medium. This therefore eliminates the use of Fe incorporated within diatom opal as a possible proxy for dissolved Fe concentrations. Article in Journal/Newspaper Antarc* Antarctic Wiley Online Library Limnology and Oceanography 45 7 1517 1524 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Zinc and iron uptake experiments were conducted with the marine diatom Thalassosira pseudonana , to investigate whether Zn and Fe are incorporated into the frustule of this diatom. Our results show that the uptake and deposition of Zn into opal has a sigmoidal relationship with the free Zn 2+ concentration of the culture medium. The amount of Zn incorporated into the opal represents only 1–3% of the total amount of Zn taken up by the diatom; however, the exact reasons for Zn incorporation into the opal are not known. Even so, the consistent relationship between Zn levels in the opal and the culture medium suggests that fossil diatoms may be used as a recorder for historical changes in oceanic free Zn 2+ concentrations. These results also demonstrate that the Zn:Si(OH) 4 relationship observed in the Pacific and Antarctic Oceans is not a result of Zn released from biogenic opal. Fe uptake experiments also revealed that Fe is incorporated into diatom opal; however, the amount incorporated appears to be regulated by the diatom and did not increase with increasing Fe concentration within the diatom culture medium. This therefore eliminates the use of Fe incorporated within diatom opal as a possible proxy for dissolved Fe concentrations. |
format |
Article in Journal/Newspaper |
author |
Ellwood, Michael J. Hunter, Keith A. |
spellingShingle |
Ellwood, Michael J. Hunter, Keith A. The incorporation of zinc and iron into the frustule of the marine diatom Thalassiosira pseudonana |
author_facet |
Ellwood, Michael J. Hunter, Keith A. |
author_sort |
Ellwood, Michael J. |
title |
The incorporation of zinc and iron into the frustule of the marine diatom Thalassiosira pseudonana |
title_short |
The incorporation of zinc and iron into the frustule of the marine diatom Thalassiosira pseudonana |
title_full |
The incorporation of zinc and iron into the frustule of the marine diatom Thalassiosira pseudonana |
title_fullStr |
The incorporation of zinc and iron into the frustule of the marine diatom Thalassiosira pseudonana |
title_full_unstemmed |
The incorporation of zinc and iron into the frustule of the marine diatom Thalassiosira pseudonana |
title_sort |
incorporation of zinc and iron into the frustule of the marine diatom thalassiosira pseudonana |
publisher |
Wiley |
publishDate |
2000 |
url |
http://dx.doi.org/10.4319/lo.2000.45.7.1517 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2000.45.7.1517 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2000.45.7.1517 |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Limnology and Oceanography volume 45, issue 7, page 1517-1524 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.2000.45.7.1517 |
container_title |
Limnology and Oceanography |
container_volume |
45 |
container_issue |
7 |
container_start_page |
1517 |
op_container_end_page |
1524 |
_version_ |
1810496650829889536 |