Direct measurements of the light dependence of gross photosynthesis and oxygen consumption in the ocean
We measured the light dependence of gross photosynthesis and oxygen uptake rates by membrane inlet mass spectrometry in two open ocean regions: the Amundsen Sea (Antarctica), dominated by Phaeocystis antarctica , and the North Atlantic, dominated by Emiliania huxleyi . In the North Atlantic, respira...
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Format: | Article in Journal/Newspaper |
Language: | English |
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2017
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ftvliz:oai:oma.vliz.be:293731 2023-05-15T13:23:36+02:00 Direct measurements of the light dependence of gross photosynthesis and oxygen consumption in the ocean Bailleul, B. Park, J. Brown, C.M. Bidle, K.D. Lee, S.H. Falkowski, P.G. 2017 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=293731 en eng info:eu-repo/semantics/altIdentifier/wos/000402907100013 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1002/lno.10486 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=293731 info:eu-repo/semantics/restrictedAccess %3Ci%3ELimnol.+Oceanogr.+62%283%29%3C%2Fi%3E%3A+1066-1079.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1002%2Flno.10486%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1002%2Flno.10486%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2017 ftvliz https://doi.org/10.1002/lno.10486 2022-05-01T10:58:15Z We measured the light dependence of gross photosynthesis and oxygen uptake rates by membrane inlet mass spectrometry in two open ocean regions: the Amundsen Sea (Antarctica), dominated by Phaeocystis antarctica , and the North Atlantic, dominated by Emiliania huxleyi . In the North Atlantic, respiration was independent of irradiance and was higher than the gross photosynthetic rate at all irradiances. In contrast, in the Amundsen Sea, oxygen uptake processes were light dependent; dark respiration was one order of magnitude lower than the maximal gross photosynthetic rate, but the oxygen uptake rate increased by 10 fold at surface irradiances. Our results suggest the light dependence of oxygen uptake in Amundsen Sea has two sources: one is independent of photosynthesis, and is possibly associated with the photo‐reduction of O 2 mediated by dissolved organic matter; the second reflects the activity of an oxidase fueled in the light with photosynthetic electron flow. Our results highlight the importance of improving our understanding of oxygen consuming reactions in the euphotic zone. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctica North Atlantic Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Amundsen Sea Limnology and Oceanography 62 3 1066 1079 |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
description |
We measured the light dependence of gross photosynthesis and oxygen uptake rates by membrane inlet mass spectrometry in two open ocean regions: the Amundsen Sea (Antarctica), dominated by Phaeocystis antarctica , and the North Atlantic, dominated by Emiliania huxleyi . In the North Atlantic, respiration was independent of irradiance and was higher than the gross photosynthetic rate at all irradiances. In contrast, in the Amundsen Sea, oxygen uptake processes were light dependent; dark respiration was one order of magnitude lower than the maximal gross photosynthetic rate, but the oxygen uptake rate increased by 10 fold at surface irradiances. Our results suggest the light dependence of oxygen uptake in Amundsen Sea has two sources: one is independent of photosynthesis, and is possibly associated with the photo‐reduction of O 2 mediated by dissolved organic matter; the second reflects the activity of an oxidase fueled in the light with photosynthetic electron flow. Our results highlight the importance of improving our understanding of oxygen consuming reactions in the euphotic zone. |
format |
Article in Journal/Newspaper |
author |
Bailleul, B. Park, J. Brown, C.M. Bidle, K.D. Lee, S.H. Falkowski, P.G. |
spellingShingle |
Bailleul, B. Park, J. Brown, C.M. Bidle, K.D. Lee, S.H. Falkowski, P.G. Direct measurements of the light dependence of gross photosynthesis and oxygen consumption in the ocean |
author_facet |
Bailleul, B. Park, J. Brown, C.M. Bidle, K.D. Lee, S.H. Falkowski, P.G. |
author_sort |
Bailleul, B. |
title |
Direct measurements of the light dependence of gross photosynthesis and oxygen consumption in the ocean |
title_short |
Direct measurements of the light dependence of gross photosynthesis and oxygen consumption in the ocean |
title_full |
Direct measurements of the light dependence of gross photosynthesis and oxygen consumption in the ocean |
title_fullStr |
Direct measurements of the light dependence of gross photosynthesis and oxygen consumption in the ocean |
title_full_unstemmed |
Direct measurements of the light dependence of gross photosynthesis and oxygen consumption in the ocean |
title_sort |
direct measurements of the light dependence of gross photosynthesis and oxygen consumption in the ocean |
publishDate |
2017 |
url |
http://www.vliz.be/nl/open-marien-archief?module=ref&refid=293731 |
geographic |
Amundsen Sea |
geographic_facet |
Amundsen Sea |
genre |
Amundsen Sea Antarc* Antarctica North Atlantic |
genre_facet |
Amundsen Sea Antarc* Antarctica North Atlantic |
op_source |
%3Ci%3ELimnol.+Oceanogr.+62%283%29%3C%2Fi%3E%3A+1066-1079.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1002%2Flno.10486%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1002%2Flno.10486%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000402907100013 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1002/lno.10486 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=293731 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1002/lno.10486 |
container_title |
Limnology and Oceanography |
container_volume |
62 |
container_issue |
3 |
container_start_page |
1066 |
op_container_end_page |
1079 |
_version_ |
1766373451112644608 |