Phosphonate cycling supports methane and ethylene supersaturation in the phosphate‐depleted western North Atlantic Ocean
Abstract In oligotrophic ocean regions, dissolved organic phosphorus (DOP) plays a prominent role as a source of phosphorus (P) to microorganisms. An important bioavailable component of DOP is phosphonates, organophosphorus compounds with a carbon‐phosphorus (C‐P) bond, which are ubiquitous in high...
Published in: | Limnology and Oceanography |
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Online Access: | http://dx.doi.org/10.1002/lno.11463 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.11463 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11463 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11463 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11463 |
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crwiley:10.1002/lno.11463 2024-06-23T07:54:59+00:00 Phosphonate cycling supports methane and ethylene supersaturation in the phosphate‐depleted western North Atlantic Ocean Sosa, Oscar A. Burrell, Timothy J. Wilson, Samuel T. Foreman, Rhea K. Karl, David M. Repeta, Daniel J. Division of Ocean Sciences Gordon and Betty Moore Foundation Simons Foundation 2020 http://dx.doi.org/10.1002/lno.11463 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.11463 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11463 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11463 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11463 en eng Wiley http://creativecommons.org/licenses/by-nc/4.0/ http://creativecommons.org/licenses/by-nc/4.0/ Limnology and Oceanography volume 65, issue 10, page 2443-2459 ISSN 0024-3590 1939-5590 journal-article 2020 crwiley https://doi.org/10.1002/lno.11463 2024-06-06T04:23:57Z Abstract In oligotrophic ocean regions, dissolved organic phosphorus (DOP) plays a prominent role as a source of phosphorus (P) to microorganisms. An important bioavailable component of DOP is phosphonates, organophosphorus compounds with a carbon‐phosphorus (C‐P) bond, which are ubiquitous in high molecular weight dissolved organic matter (HMWDOM). In addition to being a source of P, the degradation of phosphonates by the bacterial C‐P lyase enzymatic pathway causes the release of trace hydrocarbon gases relevant to climate and atmospheric chemistry. In this study, we investigated the roles of phosphate and phosphonate cycling in the production of methane (CH 4 ) and ethylene (C 2 H 4 ) in the western North Atlantic Ocean, a region that features a transition in phosphate concentrations from coastal to open ocean waters. We observed an inverse relationship between phosphate and the saturation state of CH 4 and C 2 H 4 in the water column, and between phosphate and the relative abundance of the C‐P lyase marker gene phnJ . In phosphate‐depleted waters, methylphosphonate and 2‐hydroxyethylphosphonate, the C‐P lyase substrates that yield CH 4 and C 2 H 4 , respectively, were readily degraded in proportions consistent with their abundance and bioavailability in HMWDOM and with the concentrations of CH 4 and C 2 H 4 in the water column. We conclude that phosphonate degradation through the C‐P lyase pathway is an important source and a common production pathway of CH 4 and C 2 H 4 in the phosphate‐depleted surface waters of the western North Atlantic Ocean and that phosphate concentration can be an important control on the saturation state of these gases in the upper ocean. Article in Journal/Newspaper North Atlantic Wiley Online Library Limnology and Oceanography 65 10 2443 2459 |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract In oligotrophic ocean regions, dissolved organic phosphorus (DOP) plays a prominent role as a source of phosphorus (P) to microorganisms. An important bioavailable component of DOP is phosphonates, organophosphorus compounds with a carbon‐phosphorus (C‐P) bond, which are ubiquitous in high molecular weight dissolved organic matter (HMWDOM). In addition to being a source of P, the degradation of phosphonates by the bacterial C‐P lyase enzymatic pathway causes the release of trace hydrocarbon gases relevant to climate and atmospheric chemistry. In this study, we investigated the roles of phosphate and phosphonate cycling in the production of methane (CH 4 ) and ethylene (C 2 H 4 ) in the western North Atlantic Ocean, a region that features a transition in phosphate concentrations from coastal to open ocean waters. We observed an inverse relationship between phosphate and the saturation state of CH 4 and C 2 H 4 in the water column, and between phosphate and the relative abundance of the C‐P lyase marker gene phnJ . In phosphate‐depleted waters, methylphosphonate and 2‐hydroxyethylphosphonate, the C‐P lyase substrates that yield CH 4 and C 2 H 4 , respectively, were readily degraded in proportions consistent with their abundance and bioavailability in HMWDOM and with the concentrations of CH 4 and C 2 H 4 in the water column. We conclude that phosphonate degradation through the C‐P lyase pathway is an important source and a common production pathway of CH 4 and C 2 H 4 in the phosphate‐depleted surface waters of the western North Atlantic Ocean and that phosphate concentration can be an important control on the saturation state of these gases in the upper ocean. |
author2 |
Division of Ocean Sciences Gordon and Betty Moore Foundation Simons Foundation |
format |
Article in Journal/Newspaper |
author |
Sosa, Oscar A. Burrell, Timothy J. Wilson, Samuel T. Foreman, Rhea K. Karl, David M. Repeta, Daniel J. |
spellingShingle |
Sosa, Oscar A. Burrell, Timothy J. Wilson, Samuel T. Foreman, Rhea K. Karl, David M. Repeta, Daniel J. Phosphonate cycling supports methane and ethylene supersaturation in the phosphate‐depleted western North Atlantic Ocean |
author_facet |
Sosa, Oscar A. Burrell, Timothy J. Wilson, Samuel T. Foreman, Rhea K. Karl, David M. Repeta, Daniel J. |
author_sort |
Sosa, Oscar A. |
title |
Phosphonate cycling supports methane and ethylene supersaturation in the phosphate‐depleted western North Atlantic Ocean |
title_short |
Phosphonate cycling supports methane and ethylene supersaturation in the phosphate‐depleted western North Atlantic Ocean |
title_full |
Phosphonate cycling supports methane and ethylene supersaturation in the phosphate‐depleted western North Atlantic Ocean |
title_fullStr |
Phosphonate cycling supports methane and ethylene supersaturation in the phosphate‐depleted western North Atlantic Ocean |
title_full_unstemmed |
Phosphonate cycling supports methane and ethylene supersaturation in the phosphate‐depleted western North Atlantic Ocean |
title_sort |
phosphonate cycling supports methane and ethylene supersaturation in the phosphate‐depleted western north atlantic ocean |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1002/lno.11463 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.11463 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11463 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11463 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11463 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Limnology and Oceanography volume 65, issue 10, page 2443-2459 ISSN 0024-3590 1939-5590 |
op_rights |
http://creativecommons.org/licenses/by-nc/4.0/ http://creativecommons.org/licenses/by-nc/4.0/ |
op_doi |
https://doi.org/10.1002/lno.11463 |
container_title |
Limnology and Oceanography |
container_volume |
65 |
container_issue |
10 |
container_start_page |
2443 |
op_container_end_page |
2459 |
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1802647350070476800 |