Distributions of particulate Heme b in the Atlantic and Southern Oceans-Implications for electron transport in phytoplankton
Concentrations of heme b, the iron-containing component of b-type hemoproteins, ranged from < 0.4 to 5.3 pM with an average of 1.18 ± 0.8 pM (± 1σ; n = 86) in the Iceland Basin (IB), from < 0.4 to 19.1 pM with an average of 2.24 ± 1.67 pM (n = 269) in the tropical northeast Atlantic (TNA) and...
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2013
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ftoceanrep:oai:oceanrep.geomar.de:22989 2023-05-15T16:51:12+02:00 Distributions of particulate Heme b in the Atlantic and Southern Oceans-Implications for electron transport in phytoplankton Gledhill, Martha Achterberg, Eric P. Honey, David J. Nielsdottir, Maria C. Rijkenberg, Micha J. A. 2013-12 text https://oceanrep.geomar.de/id/eprint/22989/ https://oceanrep.geomar.de/id/eprint/22989/1/Gledhill%20et.al.pdf https://doi.org/10.1002/2013GB004639 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/22989/1/Gledhill%20et.al.pdf Gledhill, M. , Achterberg, E. P. , Honey, D. J., Nielsdottir, M. C. and Rijkenberg, M. J. A. (2013) Distributions of particulate Heme b in the Atlantic and Southern Oceans-Implications for electron transport in phytoplankton. Open Access Global Biogeochemical Cycles, 27 (4). pp. 1072-1082. DOI 10.1002/2013GB004639 <https://doi.org/10.1002/2013GB004639>. doi:10.1002/2013GB004639 info:eu-repo/semantics/openAccess Article PeerReviewed 2013 ftoceanrep https://doi.org/10.1002/2013GB004639 2023-04-07T15:11:38Z Concentrations of heme b, the iron-containing component of b-type hemoproteins, ranged from < 0.4 to 5.3 pM with an average of 1.18 ± 0.8 pM (± 1σ; n = 86) in the Iceland Basin (IB), from < 0.4 to 19.1 pM with an average of 2.24 ± 1.67 pM (n = 269) in the tropical northeast Atlantic (TNA) and from 0.6 to 21 pM with an average of 5.1 ± 4.8 pM (n = 34) in the Scotia Sea (SS). Heme b concentrations were enhanced in the photic zone and decreased with depth. Heme b concentrations correlated positively with chlorophyll a (chl a) in the TNA (r = 0.41, p < 0.01, n = 269). Heme b did not correlate with chl a in the IB or SS. In the IB and SS, stations with high-chlorophyll and low-nutrient (Fe and/or Si) concentrations exhibited low heme b concentrations relative to particulate organic carbon (< 0.1 μmol mol−1), and high chl a:heme b ratios (> 500). High chl a:heme b ratios resulted from relative decreases in heme b, suggesting proteins such as cytochrome b6f, the core complex of photosystem II, and eukaryotic nitrate reductase were depleted relative to proteins containing chlorophyll such as the eukaryotic light-harvesting antenna. Relative variations in heme b, particulate organic carbon, and chl a can thus be indicative of a physiological response of the phytoplankton community to the prevailing growth conditions, within the context of large-scale changes in phytoplankton community composition. Article in Journal/Newspaper Iceland Northeast Atlantic Scotia Sea OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Scotia Sea Global Biogeochemical Cycles 27 4 1072 1082 |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Concentrations of heme b, the iron-containing component of b-type hemoproteins, ranged from < 0.4 to 5.3 pM with an average of 1.18 ± 0.8 pM (± 1σ; n = 86) in the Iceland Basin (IB), from < 0.4 to 19.1 pM with an average of 2.24 ± 1.67 pM (n = 269) in the tropical northeast Atlantic (TNA) and from 0.6 to 21 pM with an average of 5.1 ± 4.8 pM (n = 34) in the Scotia Sea (SS). Heme b concentrations were enhanced in the photic zone and decreased with depth. Heme b concentrations correlated positively with chlorophyll a (chl a) in the TNA (r = 0.41, p < 0.01, n = 269). Heme b did not correlate with chl a in the IB or SS. In the IB and SS, stations with high-chlorophyll and low-nutrient (Fe and/or Si) concentrations exhibited low heme b concentrations relative to particulate organic carbon (< 0.1 μmol mol−1), and high chl a:heme b ratios (> 500). High chl a:heme b ratios resulted from relative decreases in heme b, suggesting proteins such as cytochrome b6f, the core complex of photosystem II, and eukaryotic nitrate reductase were depleted relative to proteins containing chlorophyll such as the eukaryotic light-harvesting antenna. Relative variations in heme b, particulate organic carbon, and chl a can thus be indicative of a physiological response of the phytoplankton community to the prevailing growth conditions, within the context of large-scale changes in phytoplankton community composition. |
format |
Article in Journal/Newspaper |
author |
Gledhill, Martha Achterberg, Eric P. Honey, David J. Nielsdottir, Maria C. Rijkenberg, Micha J. A. |
spellingShingle |
Gledhill, Martha Achterberg, Eric P. Honey, David J. Nielsdottir, Maria C. Rijkenberg, Micha J. A. Distributions of particulate Heme b in the Atlantic and Southern Oceans-Implications for electron transport in phytoplankton |
author_facet |
Gledhill, Martha Achterberg, Eric P. Honey, David J. Nielsdottir, Maria C. Rijkenberg, Micha J. A. |
author_sort |
Gledhill, Martha |
title |
Distributions of particulate Heme b in the Atlantic and Southern Oceans-Implications for electron transport in phytoplankton |
title_short |
Distributions of particulate Heme b in the Atlantic and Southern Oceans-Implications for electron transport in phytoplankton |
title_full |
Distributions of particulate Heme b in the Atlantic and Southern Oceans-Implications for electron transport in phytoplankton |
title_fullStr |
Distributions of particulate Heme b in the Atlantic and Southern Oceans-Implications for electron transport in phytoplankton |
title_full_unstemmed |
Distributions of particulate Heme b in the Atlantic and Southern Oceans-Implications for electron transport in phytoplankton |
title_sort |
distributions of particulate heme b in the atlantic and southern oceans-implications for electron transport in phytoplankton |
publisher |
AGU (American Geophysical Union) |
publishDate |
2013 |
url |
https://oceanrep.geomar.de/id/eprint/22989/ https://oceanrep.geomar.de/id/eprint/22989/1/Gledhill%20et.al.pdf https://doi.org/10.1002/2013GB004639 |
geographic |
Scotia Sea |
geographic_facet |
Scotia Sea |
genre |
Iceland Northeast Atlantic Scotia Sea |
genre_facet |
Iceland Northeast Atlantic Scotia Sea |
op_relation |
https://oceanrep.geomar.de/id/eprint/22989/1/Gledhill%20et.al.pdf Gledhill, M. , Achterberg, E. P. , Honey, D. J., Nielsdottir, M. C. and Rijkenberg, M. J. A. (2013) Distributions of particulate Heme b in the Atlantic and Southern Oceans-Implications for electron transport in phytoplankton. Open Access Global Biogeochemical Cycles, 27 (4). pp. 1072-1082. DOI 10.1002/2013GB004639 <https://doi.org/10.1002/2013GB004639>. doi:10.1002/2013GB004639 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2013GB004639 |
container_title |
Global Biogeochemical Cycles |
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27 |
container_issue |
4 |
container_start_page |
1072 |
op_container_end_page |
1082 |
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1766041302757015552 |