Impact of water mass mixing on the biogeochemistry and microbiology of the North-East Atlantic Deep Water
The extent to which water mass mixing contributes to the biological activity of the dark ocean is essentially unknown. Using a multiparameter water mass analysis, we examined the impact of water mass mixing on the nutrient distribution and microbial activity of the Northeast Atlantic Deep Water (NEA...
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Centro Oceanográfico de A Coruña
2013
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Online Access: | http://hdl.handle.net/10508/8570 https://doi.org/10.1002/2013GB004634 |
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ftieo:oai:repositorio.ieo.es:10508/8570 2023-06-11T04:14:50+02:00 Impact of water mass mixing on the biogeochemistry and microbiology of the North-East Atlantic Deep Water Reinthaler, T. Álvarez-Salgado, X.S. Álvarez, M. (Marta) Van-Aken, H.M. (Hendrik M.) Herndl, G.J. Atlantic Ocean North Atlantic Northeast Atlantic 2013 http://hdl.handle.net/10508/8570 https://doi.org/10.1002/2013GB004634 unknown Centro Oceanográfico de A Coruña http://hdl.handle.net/10508/8570 Global Biogeochemical Cycles, 27. 2013: 1-12 1944-9224 doi:10.1002/2013GB004634 Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ open access research article 2013 ftieo https://doi.org/10.1002/2013GB004634 2023-05-02T23:49:00Z The extent to which water mass mixing contributes to the biological activity of the dark ocean is essentially unknown. Using a multiparameter water mass analysis, we examined the impact of water mass mixing on the nutrient distribution and microbial activity of the Northeast Atlantic Deep Water (NEADW) along an 8000 km long transect extending from 62°N to 5°S. Mixing of four water types (WT) and basin scale mineralization from the site where the WT where defined to the study area explained up to 95% of the variability in the distribution of inorganic nutrients and apparent oxygen utilization. Mixing-corrected average O2:N:P mineralization ratios of 127(±11):13.0(±0.7):1 in the core of the NEADW suggested preferential utilization of phosphorus compounds while dissolved organic carbon mineralization contributed a maximum of 20% to the oxygen demand of the NEADW. In conjunction with the calculated average mineralization ratios, our results indicate a major contribution of particulate organic matter to the biological activity in the NEADW. The variability in prokaryotic abundance, high nucleic acid containing cells, and prokaryotic heterotrophic production in the NEADW was explained by large scale (64–79%) and local mineralization processes (21–36%), consistent with the idea that deep-water prokaryotic communities are controlled by substrate supply. Overall, our results suggest a major impact of mixing on the distribution of inorganic nutrients and a weaker influence on the dissolved organic matter pool supporting prokaryotic activity in the NEADW. 5 Article in Journal/Newspaper North Atlantic North East Atlantic Northeast Atlantic Instituto Español de Oceanografía: e-IEO Global Biogeochemical Cycles 27 4 1151 1162 |
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Instituto Español de Oceanografía: e-IEO |
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The extent to which water mass mixing contributes to the biological activity of the dark ocean is essentially unknown. Using a multiparameter water mass analysis, we examined the impact of water mass mixing on the nutrient distribution and microbial activity of the Northeast Atlantic Deep Water (NEADW) along an 8000 km long transect extending from 62°N to 5°S. Mixing of four water types (WT) and basin scale mineralization from the site where the WT where defined to the study area explained up to 95% of the variability in the distribution of inorganic nutrients and apparent oxygen utilization. Mixing-corrected average O2:N:P mineralization ratios of 127(±11):13.0(±0.7):1 in the core of the NEADW suggested preferential utilization of phosphorus compounds while dissolved organic carbon mineralization contributed a maximum of 20% to the oxygen demand of the NEADW. In conjunction with the calculated average mineralization ratios, our results indicate a major contribution of particulate organic matter to the biological activity in the NEADW. The variability in prokaryotic abundance, high nucleic acid containing cells, and prokaryotic heterotrophic production in the NEADW was explained by large scale (64–79%) and local mineralization processes (21–36%), consistent with the idea that deep-water prokaryotic communities are controlled by substrate supply. Overall, our results suggest a major impact of mixing on the distribution of inorganic nutrients and a weaker influence on the dissolved organic matter pool supporting prokaryotic activity in the NEADW. 5 |
format |
Article in Journal/Newspaper |
author |
Reinthaler, T. Álvarez-Salgado, X.S. Álvarez, M. (Marta) Van-Aken, H.M. (Hendrik M.) Herndl, G.J. |
spellingShingle |
Reinthaler, T. Álvarez-Salgado, X.S. Álvarez, M. (Marta) Van-Aken, H.M. (Hendrik M.) Herndl, G.J. Impact of water mass mixing on the biogeochemistry and microbiology of the North-East Atlantic Deep Water |
author_facet |
Reinthaler, T. Álvarez-Salgado, X.S. Álvarez, M. (Marta) Van-Aken, H.M. (Hendrik M.) Herndl, G.J. |
author_sort |
Reinthaler, T. |
title |
Impact of water mass mixing on the biogeochemistry and microbiology of the North-East Atlantic Deep Water |
title_short |
Impact of water mass mixing on the biogeochemistry and microbiology of the North-East Atlantic Deep Water |
title_full |
Impact of water mass mixing on the biogeochemistry and microbiology of the North-East Atlantic Deep Water |
title_fullStr |
Impact of water mass mixing on the biogeochemistry and microbiology of the North-East Atlantic Deep Water |
title_full_unstemmed |
Impact of water mass mixing on the biogeochemistry and microbiology of the North-East Atlantic Deep Water |
title_sort |
impact of water mass mixing on the biogeochemistry and microbiology of the north-east atlantic deep water |
publisher |
Centro Oceanográfico de A Coruña |
publishDate |
2013 |
url |
http://hdl.handle.net/10508/8570 https://doi.org/10.1002/2013GB004634 |
op_coverage |
Atlantic Ocean North Atlantic Northeast Atlantic |
genre |
North Atlantic North East Atlantic Northeast Atlantic |
genre_facet |
North Atlantic North East Atlantic Northeast Atlantic |
op_relation |
http://hdl.handle.net/10508/8570 Global Biogeochemical Cycles, 27. 2013: 1-12 1944-9224 doi:10.1002/2013GB004634 |
op_rights |
Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ open access |
op_doi |
https://doi.org/10.1002/2013GB004634 |
container_title |
Global Biogeochemical Cycles |
container_volume |
27 |
container_issue |
4 |
container_start_page |
1151 |
op_container_end_page |
1162 |
_version_ |
1768371165571579904 |