Influence of the Amazon River on dissolved and intra-cellular metal concentrations in Trichodesmium colonies along the western boundary of the sub-tropical North Atlantic Ocean
9 páginas, 5 figuras, 2 tablas. Despite the ecological importance of Trichodesmium spp. for the global oceanic nitrogen budget, there is limited information on their trace metal composition in field samples. We report dissolved (<0.22 μm) metal concentrations measured in surface waters (Ag, Cd, C...
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ftcsic:oai:digital.csic.es:10261/47045 2024-02-11T10:06:24+01:00 Influence of the Amazon River on dissolved and intra-cellular metal concentrations in Trichodesmium colonies along the western boundary of the sub-tropical North Atlantic Ocean Tovar-Sánchez, Antonio Sañudo-Wilhelmy, Sergio A. 2011-01-28 http://hdl.handle.net/10261/47045 https://doi.org/10.5194/bg-8-217-2011 en eng European Geosciences Union http://dx.doi.org/10.5194/bg-8-217-2011 Biogeosciences 8 (1) : 217-225 (2011) 1726-4170 http://hdl.handle.net/10261/47045 doi:10.5194/bg-8-217-2011 1726-4189 open artículo http://purl.org/coar/resource_type/c_6501 2011 ftcsic https://doi.org/10.5194/bg-8-217-2011 2024-01-16T09:36:41Z 9 páginas, 5 figuras, 2 tablas. Despite the ecological importance of Trichodesmium spp. for the global oceanic nitrogen budget, there is limited information on their trace metal composition in field samples. We report dissolved (<0.22 μm) metal concentrations measured in surface waters (Ag, Cd, Co, Cu, Fe, Mo, Ni, P, Pb and V) and in the total and the intracellular pool (Ag, Al, Cd, Co, Cu, Fe, Mn, Mo, Ni, P, Pb, V) of Trichodesmium populations collected in the western subtropical North Atlantic Ocean (April–May 2003) within the influence of the Amazon River plume. Dissolved element distributions were strongly influenced by the River discharge, with concentrations of some elements varying directly (i.e. Cd, Mo and V) or inversely (Ag, Co, Cu, Fe, Ni, P and Pb) with surface salinity. Intracellular metal values to phosphorous ratios (mol:mol) for Cd, Co, Cu, Fe, Mn, Mo, Ni and V ranged from 9.0 × 10−6 for Cd to 4.4 × 10−2 for Fe. Although total metal composition was significantly correlated with the intracellular content in the Trichodesmium colonies for some elements (e.g., Co, Cu, V), metal pools in the phytoplankton did not co-vary with the dissolved metal concentrations, suggesting that water column measurements may not be good predictors of the intracellular metal concentrations. The impact of physical parameters and bioactive elements on biological processes such as nitrogen fixation, carbon drawdown and biomass production in Trichodesmium colonies was explored by using a principal component analysis test (PCA). The analysis indicated that the biological drawdown of dissolved inorganic carbon (DIC) by Trichodesmium seems to be influenced by the internal content of Fe, Co, Cd, and Cu, while nitrogen fixation seems more influenced by mixed layer depth and dissolved Fe and Ni concentrations. Soporte económico proviente del NOAA Carbon Sequestration Program (NA04OAR4310097) y de las becas del US National Science Foundation (OCE-0962209 y OCE 0850730)para S. A. Sañudo-Wilhelmy Peer reviewed Article in Journal/Newspaper North Atlantic Digital.CSIC (Spanish National Research Council) Biogeosciences 8 1 217 225 |
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Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
description |
9 páginas, 5 figuras, 2 tablas. Despite the ecological importance of Trichodesmium spp. for the global oceanic nitrogen budget, there is limited information on their trace metal composition in field samples. We report dissolved (<0.22 μm) metal concentrations measured in surface waters (Ag, Cd, Co, Cu, Fe, Mo, Ni, P, Pb and V) and in the total and the intracellular pool (Ag, Al, Cd, Co, Cu, Fe, Mn, Mo, Ni, P, Pb, V) of Trichodesmium populations collected in the western subtropical North Atlantic Ocean (April–May 2003) within the influence of the Amazon River plume. Dissolved element distributions were strongly influenced by the River discharge, with concentrations of some elements varying directly (i.e. Cd, Mo and V) or inversely (Ag, Co, Cu, Fe, Ni, P and Pb) with surface salinity. Intracellular metal values to phosphorous ratios (mol:mol) for Cd, Co, Cu, Fe, Mn, Mo, Ni and V ranged from 9.0 × 10−6 for Cd to 4.4 × 10−2 for Fe. Although total metal composition was significantly correlated with the intracellular content in the Trichodesmium colonies for some elements (e.g., Co, Cu, V), metal pools in the phytoplankton did not co-vary with the dissolved metal concentrations, suggesting that water column measurements may not be good predictors of the intracellular metal concentrations. The impact of physical parameters and bioactive elements on biological processes such as nitrogen fixation, carbon drawdown and biomass production in Trichodesmium colonies was explored by using a principal component analysis test (PCA). The analysis indicated that the biological drawdown of dissolved inorganic carbon (DIC) by Trichodesmium seems to be influenced by the internal content of Fe, Co, Cd, and Cu, while nitrogen fixation seems more influenced by mixed layer depth and dissolved Fe and Ni concentrations. Soporte económico proviente del NOAA Carbon Sequestration Program (NA04OAR4310097) y de las becas del US National Science Foundation (OCE-0962209 y OCE 0850730)para S. A. Sañudo-Wilhelmy Peer reviewed |
format |
Article in Journal/Newspaper |
author |
Tovar-Sánchez, Antonio Sañudo-Wilhelmy, Sergio A. |
spellingShingle |
Tovar-Sánchez, Antonio Sañudo-Wilhelmy, Sergio A. Influence of the Amazon River on dissolved and intra-cellular metal concentrations in Trichodesmium colonies along the western boundary of the sub-tropical North Atlantic Ocean |
author_facet |
Tovar-Sánchez, Antonio Sañudo-Wilhelmy, Sergio A. |
author_sort |
Tovar-Sánchez, Antonio |
title |
Influence of the Amazon River on dissolved and intra-cellular metal concentrations in Trichodesmium colonies along the western boundary of the sub-tropical North Atlantic Ocean |
title_short |
Influence of the Amazon River on dissolved and intra-cellular metal concentrations in Trichodesmium colonies along the western boundary of the sub-tropical North Atlantic Ocean |
title_full |
Influence of the Amazon River on dissolved and intra-cellular metal concentrations in Trichodesmium colonies along the western boundary of the sub-tropical North Atlantic Ocean |
title_fullStr |
Influence of the Amazon River on dissolved and intra-cellular metal concentrations in Trichodesmium colonies along the western boundary of the sub-tropical North Atlantic Ocean |
title_full_unstemmed |
Influence of the Amazon River on dissolved and intra-cellular metal concentrations in Trichodesmium colonies along the western boundary of the sub-tropical North Atlantic Ocean |
title_sort |
influence of the amazon river on dissolved and intra-cellular metal concentrations in trichodesmium colonies along the western boundary of the sub-tropical north atlantic ocean |
publisher |
European Geosciences Union |
publishDate |
2011 |
url |
http://hdl.handle.net/10261/47045 https://doi.org/10.5194/bg-8-217-2011 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://dx.doi.org/10.5194/bg-8-217-2011 Biogeosciences 8 (1) : 217-225 (2011) 1726-4170 http://hdl.handle.net/10261/47045 doi:10.5194/bg-8-217-2011 1726-4189 |
op_rights |
open |
op_doi |
https://doi.org/10.5194/bg-8-217-2011 |
container_title |
Biogeosciences |
container_volume |
8 |
container_issue |
1 |
container_start_page |
217 |
op_container_end_page |
225 |
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1790604092964339712 |