Sea ice diatom contributions to Holocene nutrient utilization in East Antarctica
Combined high-resolution Holocene d 30 Si diat and d 13 C diat paleorecords are presented from the Seasonal Ice Zone, East Antarctica. Both data sets reflect periods of increased nutrient utilization by diatoms during the Hypsithermal period (circa 7800 to 3500?calendar years (cal years) B.P.), coin...
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2014
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ftvliz:oai:oma.vliz.be:247032 2023-05-15T13:59:38+02:00 Sea ice diatom contributions to Holocene nutrient utilization in East Antarctica Panizzo, V Crespin, J Crosta, X. Shemesh, A Masse, G Yam, R Mattielli, N. Cardinal, D. 2014 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=247032 en eng info:eu-repo/semantics/altIdentifier/wos/000336026300004 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1002/2014PA002609 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=247032 info:eu-repo/semantics/restrictedAccess %3Ci%3EPaleoceanography+29%284%29%3C%2Fi%3E%3A+328-342.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1002%2F2014PA002609%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1002%2F2014PA002609%3C%2Fa%3E Bacillariophyceae [Featherlike diatoms] Fragilariopsis curta Fragilariopsis cylindrus Fragilariopsis kerguelensis info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2014 ftvliz https://doi.org/10.1002/2014PA002609 2022-05-01T10:26:58Z Combined high-resolution Holocene d 30 Si diat and d 13 C diat paleorecords are presented from the Seasonal Ice Zone, East Antarctica. Both data sets reflect periods of increased nutrient utilization by diatoms during the Hypsithermal period (circa 7800 to 3500?calendar years (cal years) B.P.), coincident with a higher abundance of open water diatom species ( Fragilariopsis kerguelensis ), increased biogenic silica productivity (%BSi), and higher regional summer temperatures. The Neoglacial period (after circa 3500?cal years B.P.) is reflected by an increase in sea ice indicative species ( Fragilariopsis curta and Fragilariopsis cylindrus , up to 50%) along with a decrease in %BSi and d 13 C diat (< -18‰ to -23‰). However, over this period, d 30 Si diat data show an increasing trend, to some of the highest values in the Holocene record (average of +0.43‰). Competing hypotheses are discussed to account for the decoupling trend in utilization proxies including iron fertilization, species-dependent fractionation effects, and diatom habitats. Based on mass balance calculations, we highlight that diatom species derived from the semi-enclosed sea ice environment may have a confounding effect upon d 30 Si downcore compositions of the seasonal sea ice zone. A diatom composition, with approximately 28% of biogenic silica derived from the sea ice environment (diat-SI) can account for the increased average composition of d 30 Si diat during the Neoglacial. These data highlight the significant role sea ice diatoms can play with relation to their export in sediment records, which has implications on productivity reconstructions from the seasonal ice zone. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Sea ice Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) East Antarctica Paleoceanography 29 4 328 343 |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
topic |
Bacillariophyceae [Featherlike diatoms] Fragilariopsis curta Fragilariopsis cylindrus Fragilariopsis kerguelensis |
spellingShingle |
Bacillariophyceae [Featherlike diatoms] Fragilariopsis curta Fragilariopsis cylindrus Fragilariopsis kerguelensis Panizzo, V Crespin, J Crosta, X. Shemesh, A Masse, G Yam, R Mattielli, N. Cardinal, D. Sea ice diatom contributions to Holocene nutrient utilization in East Antarctica |
topic_facet |
Bacillariophyceae [Featherlike diatoms] Fragilariopsis curta Fragilariopsis cylindrus Fragilariopsis kerguelensis |
description |
Combined high-resolution Holocene d 30 Si diat and d 13 C diat paleorecords are presented from the Seasonal Ice Zone, East Antarctica. Both data sets reflect periods of increased nutrient utilization by diatoms during the Hypsithermal period (circa 7800 to 3500?calendar years (cal years) B.P.), coincident with a higher abundance of open water diatom species ( Fragilariopsis kerguelensis ), increased biogenic silica productivity (%BSi), and higher regional summer temperatures. The Neoglacial period (after circa 3500?cal years B.P.) is reflected by an increase in sea ice indicative species ( Fragilariopsis curta and Fragilariopsis cylindrus , up to 50%) along with a decrease in %BSi and d 13 C diat (< -18‰ to -23‰). However, over this period, d 30 Si diat data show an increasing trend, to some of the highest values in the Holocene record (average of +0.43‰). Competing hypotheses are discussed to account for the decoupling trend in utilization proxies including iron fertilization, species-dependent fractionation effects, and diatom habitats. Based on mass balance calculations, we highlight that diatom species derived from the semi-enclosed sea ice environment may have a confounding effect upon d 30 Si downcore compositions of the seasonal sea ice zone. A diatom composition, with approximately 28% of biogenic silica derived from the sea ice environment (diat-SI) can account for the increased average composition of d 30 Si diat during the Neoglacial. These data highlight the significant role sea ice diatoms can play with relation to their export in sediment records, which has implications on productivity reconstructions from the seasonal ice zone. |
format |
Article in Journal/Newspaper |
author |
Panizzo, V Crespin, J Crosta, X. Shemesh, A Masse, G Yam, R Mattielli, N. Cardinal, D. |
author_facet |
Panizzo, V Crespin, J Crosta, X. Shemesh, A Masse, G Yam, R Mattielli, N. Cardinal, D. |
author_sort |
Panizzo, V |
title |
Sea ice diatom contributions to Holocene nutrient utilization in East Antarctica |
title_short |
Sea ice diatom contributions to Holocene nutrient utilization in East Antarctica |
title_full |
Sea ice diatom contributions to Holocene nutrient utilization in East Antarctica |
title_fullStr |
Sea ice diatom contributions to Holocene nutrient utilization in East Antarctica |
title_full_unstemmed |
Sea ice diatom contributions to Holocene nutrient utilization in East Antarctica |
title_sort |
sea ice diatom contributions to holocene nutrient utilization in east antarctica |
publishDate |
2014 |
url |
http://www.vliz.be/nl/open-marien-archief?module=ref&refid=247032 |
geographic |
East Antarctica |
geographic_facet |
East Antarctica |
genre |
Antarc* Antarctica East Antarctica Sea ice |
genre_facet |
Antarc* Antarctica East Antarctica Sea ice |
op_source |
%3Ci%3EPaleoceanography+29%284%29%3C%2Fi%3E%3A+328-342.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1002%2F2014PA002609%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1002%2F2014PA002609%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000336026300004 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1002/2014PA002609 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=247032 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1002/2014PA002609 |
container_title |
Paleoceanography |
container_volume |
29 |
container_issue |
4 |
container_start_page |
328 |
op_container_end_page |
343 |
_version_ |
1766268306493276160 |