Fe and Zn Effects on the Si Cycle and Diatom Community Structure in Two Contrasting High and Low-silicate HNLC Areas
We compared the importance of Fe, Zn and Si availability for diatom growth and silicification through microcosm enrichment experiments in two contrasting HNLC systems of the Sub-Arctic and Sub-Antarctic Pacific. The Bering Sea was characterized by low Fe and Zn concentrations (Pseudo-nitzschiasp. an...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
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Digital Commons @ University of South Florida
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Online Access: | https://digitalcommons.usf.edu/msc_facpub/617 https://doi.org/10.1016/j.dsr.2005.06.005 |
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ftusouthflorida:oai:digitalcommons.usf.edu:msc_facpub-1621 2023-07-30T03:56:47+02:00 Fe and Zn Effects on the Si Cycle and Diatom Community Structure in Two Contrasting High and Low-silicate HNLC Areas Leblanc, Karine Hare, Clinton Boyd, P. W. Bruland, Kenneth Sohst, Bettina Pickmere, Stuart Lohan, Maeve Buck, Kristen N. Ellwood, Michael Hutchins, David 2005-10-01T07:00:00Z https://digitalcommons.usf.edu/msc_facpub/617 https://doi.org/10.1016/j.dsr.2005.06.005 unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/msc_facpub/617 doi:10.1016/j.dsr.2005.06.005 https://doi.org/10.1016/j.dsr.2005.06.005 Marine Science Faculty Publications Iron Zinc Silicate Diatoms HNLC HNLSiLC Trace metal limitation Life Sciences article 2005 ftusouthflorida https://doi.org/10.1016/j.dsr.2005.06.005 2023-07-13T20:45:14Z We compared the importance of Fe, Zn and Si availability for diatom growth and silicification through microcosm enrichment experiments in two contrasting HNLC systems of the Sub-Arctic and Sub-Antarctic Pacific. The Bering Sea was characterized by low Fe and Zn concentrations (Pseudo-nitzschiasp. and Cylindrotheca closterium), an increase in Chl a, biogenic silica, and particulate organic carbon and nitrogen, and a 2–3-fold decrease in the average cellular Si content. Zn had no impact on biomass parameters or diatom community structure in this region. The Sub-Antarctic Zone (SAZ) was a low Si-HNLC system, with initial silicic acid levels of 0.45 μM and Fe and Zn concentrations Pseudo-nitzschiasp.) towards a smaller and less silicified solitary pennate (Cylindrotheca closterium), potentially prone to more rapid silica dissolution in the surface layer. Despite the dominance by the same two diatom genera, these two high-latitude regimes exhibited different nutrient limitation scenarios. Diatom growth in the Bering Sea was strongly Fe-limited, while the SAZ was mainly limited by Si and only secondarily by Fe. Article in Journal/Newspaper Antarc* Antarctic Arctic Bering Sea University of South Florida St. Petersburg: Digital USFSP Antarctic Arctic Bering Sea Pacific Deep Sea Research Part I: Oceanographic Research Papers 52 10 1842 1864 |
institution |
Open Polar |
collection |
University of South Florida St. Petersburg: Digital USFSP |
op_collection_id |
ftusouthflorida |
language |
unknown |
topic |
Iron Zinc Silicate Diatoms HNLC HNLSiLC Trace metal limitation Life Sciences |
spellingShingle |
Iron Zinc Silicate Diatoms HNLC HNLSiLC Trace metal limitation Life Sciences Leblanc, Karine Hare, Clinton Boyd, P. W. Bruland, Kenneth Sohst, Bettina Pickmere, Stuart Lohan, Maeve Buck, Kristen N. Ellwood, Michael Hutchins, David Fe and Zn Effects on the Si Cycle and Diatom Community Structure in Two Contrasting High and Low-silicate HNLC Areas |
topic_facet |
Iron Zinc Silicate Diatoms HNLC HNLSiLC Trace metal limitation Life Sciences |
description |
We compared the importance of Fe, Zn and Si availability for diatom growth and silicification through microcosm enrichment experiments in two contrasting HNLC systems of the Sub-Arctic and Sub-Antarctic Pacific. The Bering Sea was characterized by low Fe and Zn concentrations (Pseudo-nitzschiasp. and Cylindrotheca closterium), an increase in Chl a, biogenic silica, and particulate organic carbon and nitrogen, and a 2–3-fold decrease in the average cellular Si content. Zn had no impact on biomass parameters or diatom community structure in this region. The Sub-Antarctic Zone (SAZ) was a low Si-HNLC system, with initial silicic acid levels of 0.45 μM and Fe and Zn concentrations Pseudo-nitzschiasp.) towards a smaller and less silicified solitary pennate (Cylindrotheca closterium), potentially prone to more rapid silica dissolution in the surface layer. Despite the dominance by the same two diatom genera, these two high-latitude regimes exhibited different nutrient limitation scenarios. Diatom growth in the Bering Sea was strongly Fe-limited, while the SAZ was mainly limited by Si and only secondarily by Fe. |
format |
Article in Journal/Newspaper |
author |
Leblanc, Karine Hare, Clinton Boyd, P. W. Bruland, Kenneth Sohst, Bettina Pickmere, Stuart Lohan, Maeve Buck, Kristen N. Ellwood, Michael Hutchins, David |
author_facet |
Leblanc, Karine Hare, Clinton Boyd, P. W. Bruland, Kenneth Sohst, Bettina Pickmere, Stuart Lohan, Maeve Buck, Kristen N. Ellwood, Michael Hutchins, David |
author_sort |
Leblanc, Karine |
title |
Fe and Zn Effects on the Si Cycle and Diatom Community Structure in Two Contrasting High and Low-silicate HNLC Areas |
title_short |
Fe and Zn Effects on the Si Cycle and Diatom Community Structure in Two Contrasting High and Low-silicate HNLC Areas |
title_full |
Fe and Zn Effects on the Si Cycle and Diatom Community Structure in Two Contrasting High and Low-silicate HNLC Areas |
title_fullStr |
Fe and Zn Effects on the Si Cycle and Diatom Community Structure in Two Contrasting High and Low-silicate HNLC Areas |
title_full_unstemmed |
Fe and Zn Effects on the Si Cycle and Diatom Community Structure in Two Contrasting High and Low-silicate HNLC Areas |
title_sort |
fe and zn effects on the si cycle and diatom community structure in two contrasting high and low-silicate hnlc areas |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2005 |
url |
https://digitalcommons.usf.edu/msc_facpub/617 https://doi.org/10.1016/j.dsr.2005.06.005 |
geographic |
Antarctic Arctic Bering Sea Pacific |
geographic_facet |
Antarctic Arctic Bering Sea Pacific |
genre |
Antarc* Antarctic Arctic Bering Sea |
genre_facet |
Antarc* Antarctic Arctic Bering Sea |
op_source |
Marine Science Faculty Publications |
op_relation |
https://digitalcommons.usf.edu/msc_facpub/617 doi:10.1016/j.dsr.2005.06.005 https://doi.org/10.1016/j.dsr.2005.06.005 |
op_doi |
https://doi.org/10.1016/j.dsr.2005.06.005 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
52 |
container_issue |
10 |
container_start_page |
1842 |
op_container_end_page |
1864 |
_version_ |
1772814611597230080 |