Combined effects of hydrographic structure and iron and copper availabilityon the phytoplankton growth in Terra Nova Bay Polynya(Ross Sea, Antarctica)
Surface water (o100 m) samples were collected from the Terra Nova Bay polynya region of the Ross Sea (Antarctica) in January 2006, with the aim of evaluating the individual and combined effects of hydrographic structure, iron and copper concentration and availability on the phytoplankton growth. The...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2012
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Online Access: | http://hdl.handle.net/11567/379664 https://doi.org/10.1016/j.dsr.2011.12.008 |
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ftunivgenova:oai:iris.unige.it:11567/379664 2024-02-11T09:56:48+01:00 Combined effects of hydrographic structure and iron and copper availabilityon the phytoplankton growth in Terra Nova Bay Polynya(Ross Sea, Antarctica) RIVARO, PAOLA FRANCESCA GROTTI, MARCO IANNI, MARIA CARMELA MAGI, EMANUELE M. L. Abelmoschi F. Margiotta S. Massolo V. Saggiomo Rivaro, PAOLA FRANCESCA M. L., Abelmoschi Grotti, Marco Ianni, MARIA CARMELA Magi, Emanuele F., Margiotta S., Massolo V., Saggiomo 2012 STAMPA http://hdl.handle.net/11567/379664 https://doi.org/10.1016/j.dsr.2011.12.008 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000302672000009 volume:62 firstpage:97 lastpage:110 numberofpages:14 journal:DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS http://hdl.handle.net/11567/379664 doi:10.1016/j.dsr.2011.12.008 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84856248510 info:eu-repo/semantics/article 2012 ftunivgenova https://doi.org/10.1016/j.dsr.2011.12.008 2024-01-17T17:52:43Z Surface water (o100 m) samples were collected from the Terra Nova Bay polynya region of the Ross Sea (Antarctica) in January 2006, with the aim of evaluating the individual and combined effects of hydrographic structure, iron and copper concentration and availability on the phytoplankton growth. The measurements were conducted within the framework of the Climatic Long Term Interaction for the Mass-balance in Antarctica (CLIMA) Project of the Programma Nazionale di Ricerca in Antartide activities. Dissolved oxygen, nutrients, phytoplankton pigments and concentration and complexation of dissolved trace metals were determined. Experimental data were elaborated by Principal Component Analysis (PCA). As a result of solar heating and freshwater inputs from melting sea-ice, the water column was strongly stratified with an Upper Mixed Layer 4–16 m deep. The integrated Chl a in the layer 0–100 m ranged from 60 mg m2 to 235 mg m2, with a mean value of 138 mg m2. The pigment analysis showed that diatoms dominated the phytoplankton assemblage. Major nutrients were generally high, with the lowest concentration at the surface and they were never fully depleted. The Si:N drawdown ratio was close to the expected value of 1 for Fe-replete diatoms. We evaluated both the total and the labile dissolved fraction of Fe and Cu. The labile fraction was operationally defined by employing the chelating resin Chelex-100, which retains free and loosely bound trace metal species. The total dissolved Fe ranged from 0.48 to 3.02 nM, while the total dissolved Cu from 3.68 to 6.84 nM. The dissolved labile Fe ranged from below the detection limit (0.15 nM) to 1.22 nM, and the dissolved labile Cu from 0.31 to 1.59 nM, respectively. The labile fractions measured at 20 m were significantly lower than values in 40–100 m samples. As two stations were re-sampled 5 days later, we evaluated the shortterm variability of the physical and biogeochemical properties. In particular, in a re-sampled station at 20 m, the total dissolved Fe increased and the ... Article in Journal/Newspaper Antarc* Antarctica Antartide Ross Sea Sea ice Università degli Studi di Genova: CINECA IRIS Ross Sea Terra Nova Bay Deep Sea Research Part I: Oceanographic Research Papers 62 97 110 |
institution |
Open Polar |
collection |
Università degli Studi di Genova: CINECA IRIS |
op_collection_id |
ftunivgenova |
language |
English |
description |
Surface water (o100 m) samples were collected from the Terra Nova Bay polynya region of the Ross Sea (Antarctica) in January 2006, with the aim of evaluating the individual and combined effects of hydrographic structure, iron and copper concentration and availability on the phytoplankton growth. The measurements were conducted within the framework of the Climatic Long Term Interaction for the Mass-balance in Antarctica (CLIMA) Project of the Programma Nazionale di Ricerca in Antartide activities. Dissolved oxygen, nutrients, phytoplankton pigments and concentration and complexation of dissolved trace metals were determined. Experimental data were elaborated by Principal Component Analysis (PCA). As a result of solar heating and freshwater inputs from melting sea-ice, the water column was strongly stratified with an Upper Mixed Layer 4–16 m deep. The integrated Chl a in the layer 0–100 m ranged from 60 mg m2 to 235 mg m2, with a mean value of 138 mg m2. The pigment analysis showed that diatoms dominated the phytoplankton assemblage. Major nutrients were generally high, with the lowest concentration at the surface and they were never fully depleted. The Si:N drawdown ratio was close to the expected value of 1 for Fe-replete diatoms. We evaluated both the total and the labile dissolved fraction of Fe and Cu. The labile fraction was operationally defined by employing the chelating resin Chelex-100, which retains free and loosely bound trace metal species. The total dissolved Fe ranged from 0.48 to 3.02 nM, while the total dissolved Cu from 3.68 to 6.84 nM. The dissolved labile Fe ranged from below the detection limit (0.15 nM) to 1.22 nM, and the dissolved labile Cu from 0.31 to 1.59 nM, respectively. The labile fractions measured at 20 m were significantly lower than values in 40–100 m samples. As two stations were re-sampled 5 days later, we evaluated the shortterm variability of the physical and biogeochemical properties. In particular, in a re-sampled station at 20 m, the total dissolved Fe increased and the ... |
author2 |
Rivaro, PAOLA FRANCESCA M. L., Abelmoschi Grotti, Marco Ianni, MARIA CARMELA Magi, Emanuele F., Margiotta S., Massolo V., Saggiomo |
format |
Article in Journal/Newspaper |
author |
RIVARO, PAOLA FRANCESCA GROTTI, MARCO IANNI, MARIA CARMELA MAGI, EMANUELE M. L. Abelmoschi F. Margiotta S. Massolo V. Saggiomo |
spellingShingle |
RIVARO, PAOLA FRANCESCA GROTTI, MARCO IANNI, MARIA CARMELA MAGI, EMANUELE M. L. Abelmoschi F. Margiotta S. Massolo V. Saggiomo Combined effects of hydrographic structure and iron and copper availabilityon the phytoplankton growth in Terra Nova Bay Polynya(Ross Sea, Antarctica) |
author_facet |
RIVARO, PAOLA FRANCESCA GROTTI, MARCO IANNI, MARIA CARMELA MAGI, EMANUELE M. L. Abelmoschi F. Margiotta S. Massolo V. Saggiomo |
author_sort |
RIVARO, PAOLA FRANCESCA |
title |
Combined effects of hydrographic structure and iron and copper availabilityon the phytoplankton growth in Terra Nova Bay Polynya(Ross Sea, Antarctica) |
title_short |
Combined effects of hydrographic structure and iron and copper availabilityon the phytoplankton growth in Terra Nova Bay Polynya(Ross Sea, Antarctica) |
title_full |
Combined effects of hydrographic structure and iron and copper availabilityon the phytoplankton growth in Terra Nova Bay Polynya(Ross Sea, Antarctica) |
title_fullStr |
Combined effects of hydrographic structure and iron and copper availabilityon the phytoplankton growth in Terra Nova Bay Polynya(Ross Sea, Antarctica) |
title_full_unstemmed |
Combined effects of hydrographic structure and iron and copper availabilityon the phytoplankton growth in Terra Nova Bay Polynya(Ross Sea, Antarctica) |
title_sort |
combined effects of hydrographic structure and iron and copper availabilityon the phytoplankton growth in terra nova bay polynya(ross sea, antarctica) |
publishDate |
2012 |
url |
http://hdl.handle.net/11567/379664 https://doi.org/10.1016/j.dsr.2011.12.008 |
geographic |
Ross Sea Terra Nova Bay |
geographic_facet |
Ross Sea Terra Nova Bay |
genre |
Antarc* Antarctica Antartide Ross Sea Sea ice |
genre_facet |
Antarc* Antarctica Antartide Ross Sea Sea ice |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000302672000009 volume:62 firstpage:97 lastpage:110 numberofpages:14 journal:DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS http://hdl.handle.net/11567/379664 doi:10.1016/j.dsr.2011.12.008 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84856248510 |
op_doi |
https://doi.org/10.1016/j.dsr.2011.12.008 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
62 |
container_start_page |
97 |
op_container_end_page |
110 |
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1790606049898659840 |