The essential bioactive role of nickel in the oceans: Evidence from nickel isotopes
The role of nickel (Ni) in ocean biogeochemical cycles is both under-studied and controversial. Strong correlations between Ni and organic carbon in modern and ancient marine sediments suggest a prominent biogeochemical role over a substantial portion of Earth history. Addition of Ni to culturing an...
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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/541837 2023-12-31T10:20:33+01:00 The essential bioactive role of nickel in the oceans: Evidence from nickel isotopes Lemaitre, Nolwenn Du, Jianghui id_orcid:0 000-0002-3386-9314 De Souza, Gregory id_orcid:0 000-0002-0232-2690 Archer, Corey id_orcid:0 000-0002-6070-6297 Vance, Derek 2022-04-15 application/application/pdf https://hdl.handle.net/20.500.11850/541837 https://doi.org/10.3929/ethz-b-000541837 en eng Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2022.117513 info:eu-repo/semantics/altIdentifier/wos/000820946400010 info:eu-repo/grantAgreement/SNF/Projekte MINT/165904 info:eu-repo/grantAgreement/EC/H2020/891489 http://hdl.handle.net/20.500.11850/541837 doi:10.3929/ethz-b-000541837 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc/4.0/ Creative Commons Attribution-NonCommercial 4.0 International Earth and Planetary Science Letters, 584 nickel isotopes phytoplankton requirement bio-availability GEOTRACES info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2022 ftethz https://doi.org/20.500.11850/54183710.3929/ethz-b-00054183710.1016/j.epsl.2022.117513 2023-12-04T00:52:48Z The role of nickel (Ni) in ocean biogeochemical cycles is both under-studied and controversial. Strong correlations between Ni and organic carbon in modern and ancient marine sediments suggest a prominent biogeochemical role over a substantial portion of Earth history. Addition of Ni to culturing and seawater incubation experiments produces strong responses in terms of cell growth, particularly of nitrogen-fixing organisms. But the implied limiting role for phytoplankton growth is inconsistent with observations in the real ocean, specifically that photic zone Ni concentrations never descend to the very low values that characterise other bioactive, and often bio-limiting, metals like iron. These two observations can be reconciled if a large portion of the total dissolved Ni present in open-ocean surface waters is not bio-available on short timescales. Here we present new Ni concentration and stable isotope data from the GEOVIDE transect in the North Atlantic. We interpret these new data in the light of the growing database for Ni stable isotopes in the modern ocean, with implications for the biogeochemical importance of Ni. In the new North Atlantic dataset, the lowest Ni concentrations (1.8-2.6 nmol/L) and highest δ60Ni (up to +1.67‰) are associated with low nitrate, south of the subarctic front (SAF). By contrast, stations at latitudes north of the SAF, with higher surface nitrate, show very subdued variation in Ni concentrations throughout the entire depth of the water column (3.6±0.3 nmol/L, mean and 2SD), and no variation in δ60Ni beyond the narrow global deep-ocean range (+1.33±0.13 ‰). These North Atlantic Ni isotope data also show relationships with nitrogen isotope effects, observed in the same samples, that are suggestive of a link between Ni utilisation, isotope fractionation and nitrogen fixation. The global dataset, including the new data presented here, reveals a biogeochemical divide with Ni isotope fractionation only occurring in low latitude surface waters. A simple observationally constrained ... Article in Journal/Newspaper North Atlantic Subarctic ETH Zürich Research Collection |
institution |
Open Polar |
collection |
ETH Zürich Research Collection |
op_collection_id |
ftethz |
language |
English |
topic |
nickel isotopes phytoplankton requirement bio-availability GEOTRACES |
spellingShingle |
nickel isotopes phytoplankton requirement bio-availability GEOTRACES Lemaitre, Nolwenn Du, Jianghui id_orcid:0 000-0002-3386-9314 De Souza, Gregory id_orcid:0 000-0002-0232-2690 Archer, Corey id_orcid:0 000-0002-6070-6297 Vance, Derek The essential bioactive role of nickel in the oceans: Evidence from nickel isotopes |
topic_facet |
nickel isotopes phytoplankton requirement bio-availability GEOTRACES |
description |
The role of nickel (Ni) in ocean biogeochemical cycles is both under-studied and controversial. Strong correlations between Ni and organic carbon in modern and ancient marine sediments suggest a prominent biogeochemical role over a substantial portion of Earth history. Addition of Ni to culturing and seawater incubation experiments produces strong responses in terms of cell growth, particularly of nitrogen-fixing organisms. But the implied limiting role for phytoplankton growth is inconsistent with observations in the real ocean, specifically that photic zone Ni concentrations never descend to the very low values that characterise other bioactive, and often bio-limiting, metals like iron. These two observations can be reconciled if a large portion of the total dissolved Ni present in open-ocean surface waters is not bio-available on short timescales. Here we present new Ni concentration and stable isotope data from the GEOVIDE transect in the North Atlantic. We interpret these new data in the light of the growing database for Ni stable isotopes in the modern ocean, with implications for the biogeochemical importance of Ni. In the new North Atlantic dataset, the lowest Ni concentrations (1.8-2.6 nmol/L) and highest δ60Ni (up to +1.67‰) are associated with low nitrate, south of the subarctic front (SAF). By contrast, stations at latitudes north of the SAF, with higher surface nitrate, show very subdued variation in Ni concentrations throughout the entire depth of the water column (3.6±0.3 nmol/L, mean and 2SD), and no variation in δ60Ni beyond the narrow global deep-ocean range (+1.33±0.13 ‰). These North Atlantic Ni isotope data also show relationships with nitrogen isotope effects, observed in the same samples, that are suggestive of a link between Ni utilisation, isotope fractionation and nitrogen fixation. The global dataset, including the new data presented here, reveals a biogeochemical divide with Ni isotope fractionation only occurring in low latitude surface waters. A simple observationally constrained ... |
format |
Article in Journal/Newspaper |
author |
Lemaitre, Nolwenn Du, Jianghui id_orcid:0 000-0002-3386-9314 De Souza, Gregory id_orcid:0 000-0002-0232-2690 Archer, Corey id_orcid:0 000-0002-6070-6297 Vance, Derek |
author_facet |
Lemaitre, Nolwenn Du, Jianghui id_orcid:0 000-0002-3386-9314 De Souza, Gregory id_orcid:0 000-0002-0232-2690 Archer, Corey id_orcid:0 000-0002-6070-6297 Vance, Derek |
author_sort |
Lemaitre, Nolwenn |
title |
The essential bioactive role of nickel in the oceans: Evidence from nickel isotopes |
title_short |
The essential bioactive role of nickel in the oceans: Evidence from nickel isotopes |
title_full |
The essential bioactive role of nickel in the oceans: Evidence from nickel isotopes |
title_fullStr |
The essential bioactive role of nickel in the oceans: Evidence from nickel isotopes |
title_full_unstemmed |
The essential bioactive role of nickel in the oceans: Evidence from nickel isotopes |
title_sort |
essential bioactive role of nickel in the oceans: evidence from nickel isotopes |
publisher |
Elsevier |
publishDate |
2022 |
url |
https://hdl.handle.net/20.500.11850/541837 https://doi.org/10.3929/ethz-b-000541837 |
genre |
North Atlantic Subarctic |
genre_facet |
North Atlantic Subarctic |
op_source |
Earth and Planetary Science Letters, 584 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2022.117513 info:eu-repo/semantics/altIdentifier/wos/000820946400010 info:eu-repo/grantAgreement/SNF/Projekte MINT/165904 info:eu-repo/grantAgreement/EC/H2020/891489 http://hdl.handle.net/20.500.11850/541837 doi:10.3929/ethz-b-000541837 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc/4.0/ Creative Commons Attribution-NonCommercial 4.0 International |
op_doi |
https://doi.org/20.500.11850/54183710.3929/ethz-b-00054183710.1016/j.epsl.2022.117513 |
_version_ |
1786830987616845824 |