Geographical gradients of dissolved Vitamin B12 in the Mediterranean Sea
Most eukaryotic phytoplankton require vitamin B12 to grow. However, the cycling of this organic growth factor has received substantially less attention than other bioactive substances such as trace metals in the marine environment. This is especially true in the Mediterranean Sea, where direct measurements of dissolved vitamins have never been reported. We report here the first direct measurements of dissolved vitamin B12 across longitudinal gradients in Mediterranean waters. The range of vitamin B12 concentrations measured over the whole transect was 0.5-6.2 pM, which is slightly higher than the range (undetectable-4 pM) of ambient concentrations measured in other open ocean basins in the Pacific and Atlantic oceans. The concentrations measured in the western basin were significantly higher (p < 0.05) than those of the eastern basin. They were positively correlated with chlorophyll concentrations in the most western part of the basin, and did not show any significant correlation with any other biological variables in other regions of the sampling transect. © 2013 Bonnet, Tovar-Sánchez, Panzeca, Duarte, Ortega-Retuerta and Sañudo-Wilhelmy.
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2013
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dig-icm-es-10261-887872021-12-27T16:01:51Z Geographical gradients of dissolved Vitamin B12 in the Mediterranean Sea Bonnet, Sophie Tovar-Sánchez, Antonio Panzeca, Caterina Duarte, Carlos M. Ortega-Retuerta, E. Sañudo-Wilhelmy, Sergio A. Most eukaryotic phytoplankton require vitamin B12 to grow. However, the cycling of this organic growth factor has received substantially less attention than other bioactive substances such as trace metals in the marine environment. This is especially true in the Mediterranean Sea, where direct measurements of dissolved vitamins have never been reported. We report here the first direct measurements of dissolved vitamin B12 across longitudinal gradients in Mediterranean waters. The range of vitamin B12 concentrations measured over the whole transect was 0.5-6.2 pM, which is slightly higher than the range (undetectable-4 pM) of ambient concentrations measured in other open ocean basins in the Pacific and Atlantic oceans. The concentrations measured in the western basin were significantly higher (p < 0.05) than those of the eastern basin. They were positively correlated with chlorophyll concentrations in the most western part of the basin, and did not show any significant correlation with any other biological variables in other regions of the sampling transect. © 2013 Bonnet, Tovar-Sánchez, Panzeca, Duarte, Ortega-Retuerta and Sañudo-Wilhelmy. Peer Reviewed 2013-12-18T09:52:55Z 2013-12-18T09:52:55Z 2013 2013-12-18T09:52:56Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.3389/fmicb.2013.00126 issn: 1664-302X Frontiers in Microbiology 4: 126 (2013) http://hdl.handle.net/10261/88787 10.3389/fmicb.2013.00126 23772225 en http://dx.doi.org/10.3389/fmicb.2013.00126 open Frontiers Media |
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Most eukaryotic phytoplankton require vitamin B12 to grow. However, the cycling of this organic growth factor has received substantially less attention than other bioactive substances such as trace metals in the marine environment. This is especially true in the Mediterranean Sea, where direct measurements of dissolved vitamins have never been reported. We report here the first direct measurements of dissolved vitamin B12 across longitudinal gradients in Mediterranean waters. The range of vitamin B12 concentrations measured over the whole transect was 0.5-6.2 pM, which is slightly higher than the range (undetectable-4 pM) of ambient concentrations measured in other open ocean basins in the Pacific and Atlantic oceans. The concentrations measured in the western basin were significantly higher (p < 0.05) than those of the eastern basin. They were positively correlated with chlorophyll concentrations in the most western part of the basin, and did not show any significant correlation with any other biological variables in other regions of the sampling transect. © 2013 Bonnet, Tovar-Sánchez, Panzeca, Duarte, Ortega-Retuerta and Sañudo-Wilhelmy. |
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artículo |
author |
Bonnet, Sophie Tovar-Sánchez, Antonio Panzeca, Caterina Duarte, Carlos M. Ortega-Retuerta, E. Sañudo-Wilhelmy, Sergio A. |
spellingShingle |
Bonnet, Sophie Tovar-Sánchez, Antonio Panzeca, Caterina Duarte, Carlos M. Ortega-Retuerta, E. Sañudo-Wilhelmy, Sergio A. Geographical gradients of dissolved Vitamin B12 in the Mediterranean Sea |
author_facet |
Bonnet, Sophie Tovar-Sánchez, Antonio Panzeca, Caterina Duarte, Carlos M. Ortega-Retuerta, E. Sañudo-Wilhelmy, Sergio A. |
author_sort |
Bonnet, Sophie |
title |
Geographical gradients of dissolved Vitamin B12 in the Mediterranean Sea |
title_short |
Geographical gradients of dissolved Vitamin B12 in the Mediterranean Sea |
title_full |
Geographical gradients of dissolved Vitamin B12 in the Mediterranean Sea |
title_fullStr |
Geographical gradients of dissolved Vitamin B12 in the Mediterranean Sea |
title_full_unstemmed |
Geographical gradients of dissolved Vitamin B12 in the Mediterranean Sea |
title_sort |
geographical gradients of dissolved vitamin b12 in the mediterranean sea |
publisher |
Frontiers Media |
publishDate |
2013 |
url |
http://hdl.handle.net/10261/88787 |
work_keys_str_mv |
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