Biodegradation as an important sink of aromatic hydrocarbons in the oceans
Atmospheric deposition of semivolatile aromatic hydrocarbons accounts for an important input of organic matter to the surface ocean. Nevertheless, the biogeochemical cycling and sinks of semivolatile aromatic hydrocarbons in the ocean remain largely uncharacterized. Here we present measurements of 6...
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Online Access: | http://hdl.handle.net/10261/177338 https://doi.org/10.1038/s41561-018-0285-3 |
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ftcsic:oai:digital.csic.es:10261/177338 2024-02-11T09:58:28+01:00 Biodegradation as an important sink of aromatic hydrocarbons in the oceans González-Gaya, Belén Martínez-Varela, Alicia Vila-Costa, Maria Casal, Paulo Cerro-Gálvez, Elena Berrojalbiz, Naiara Lundin, Daniel Vidal, Montserrat Mompeán, Carmen Bode, Antonio Jiménez, Begoña Dachs, Jordi 2019 http://hdl.handle.net/10261/177338 https://doi.org/10.1038/s41561-018-0285-3 unknown Springer Nature Sí doi:10.1038/s41561-018-0285-3 issn: 1752-0894 e-issn: 1752-0908 Nature Geoscience 12: 119-125 (2019) http://hdl.handle.net/10261/177338 none artículo http://purl.org/coar/resource_type/c_6501 2019 ftcsic https://doi.org/10.1038/s41561-018-0285-3 2024-01-16T10:36:53Z Atmospheric deposition of semivolatile aromatic hydrocarbons accounts for an important input of organic matter to the surface ocean. Nevertheless, the biogeochemical cycling and sinks of semivolatile aromatic hydrocarbons in the ocean remain largely uncharacterized. Here we present measurements of 64 polycyclic aromatic hydrocarbons in plankton and seawater from the Atlantic, Pacific, Indian and Southern Oceans, as well an assessment of their microbial degradation genes. Concentrations of the more hydrophobic compounds decreased when the plankton biomass was higher, consistent with the relevance of the biological pump. The mass balance for the global oceans showed that the settling fluxes of aromatic hydrocarbons in the water column were two orders of magnitude lower than the atmospheric deposition fluxes. This imbalance was high for low molecular weight hydrocarbons, such as phenanthrene and methylphenanthrenes, highly abundant in the dissolved phase. Parent polycyclic aromatic hydrocarbons were depleted to a higher degree than alkylated polycyclic aromatic hydrocarbons, and the degradation genes for polycyclic aromatic hydrocarbons were found to be ubiquitous in oceanic metagenomes. These observations point to a key role of biodegradation in depleting the bioavailable dissolved hydrocarbons and to the microbial degradation of atmospheric inputs of organic matter as a relevant process for the marine carbon cycle. The authors thank the support of the RV Hespérides staff and UTM technicians during the cruise and Antarctic campaign. G. Caballero and M. J. Ojeda are acknowledged for technical support during the extraction and processing of the samples. This work was funded by the Spanish Government through the Malaspina 2010 (CSD2008-00077), REMARCA (CTM2012-34673), SENTINEL (CTM2015-70535-P) and ISOMICS (CTM2015-65691-R) projects. M.V.-C. acknowledges a Leonardo award from BBVA Foundation. Predoctoral fellowships from the Spanish government (A.M.-V. and P.C.), Catalan government (E.C.-G.), Spanish Oceanography ... Article in Journal/Newspaper Antarc* Antarctic Digital.CSIC (Spanish National Research Council) Antarctic Caballero ENVELOPE(-61.581,-61.581,-62.824,-62.824) Indian Pacific Nature Geoscience 12 2 119 125 |
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Open Polar |
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Digital.CSIC (Spanish National Research Council) |
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ftcsic |
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unknown |
description |
Atmospheric deposition of semivolatile aromatic hydrocarbons accounts for an important input of organic matter to the surface ocean. Nevertheless, the biogeochemical cycling and sinks of semivolatile aromatic hydrocarbons in the ocean remain largely uncharacterized. Here we present measurements of 64 polycyclic aromatic hydrocarbons in plankton and seawater from the Atlantic, Pacific, Indian and Southern Oceans, as well an assessment of their microbial degradation genes. Concentrations of the more hydrophobic compounds decreased when the plankton biomass was higher, consistent with the relevance of the biological pump. The mass balance for the global oceans showed that the settling fluxes of aromatic hydrocarbons in the water column were two orders of magnitude lower than the atmospheric deposition fluxes. This imbalance was high for low molecular weight hydrocarbons, such as phenanthrene and methylphenanthrenes, highly abundant in the dissolved phase. Parent polycyclic aromatic hydrocarbons were depleted to a higher degree than alkylated polycyclic aromatic hydrocarbons, and the degradation genes for polycyclic aromatic hydrocarbons were found to be ubiquitous in oceanic metagenomes. These observations point to a key role of biodegradation in depleting the bioavailable dissolved hydrocarbons and to the microbial degradation of atmospheric inputs of organic matter as a relevant process for the marine carbon cycle. The authors thank the support of the RV Hespérides staff and UTM technicians during the cruise and Antarctic campaign. G. Caballero and M. J. Ojeda are acknowledged for technical support during the extraction and processing of the samples. This work was funded by the Spanish Government through the Malaspina 2010 (CSD2008-00077), REMARCA (CTM2012-34673), SENTINEL (CTM2015-70535-P) and ISOMICS (CTM2015-65691-R) projects. M.V.-C. acknowledges a Leonardo award from BBVA Foundation. Predoctoral fellowships from the Spanish government (A.M.-V. and P.C.), Catalan government (E.C.-G.), Spanish Oceanography ... |
format |
Article in Journal/Newspaper |
author |
González-Gaya, Belén Martínez-Varela, Alicia Vila-Costa, Maria Casal, Paulo Cerro-Gálvez, Elena Berrojalbiz, Naiara Lundin, Daniel Vidal, Montserrat Mompeán, Carmen Bode, Antonio Jiménez, Begoña Dachs, Jordi |
spellingShingle |
González-Gaya, Belén Martínez-Varela, Alicia Vila-Costa, Maria Casal, Paulo Cerro-Gálvez, Elena Berrojalbiz, Naiara Lundin, Daniel Vidal, Montserrat Mompeán, Carmen Bode, Antonio Jiménez, Begoña Dachs, Jordi Biodegradation as an important sink of aromatic hydrocarbons in the oceans |
author_facet |
González-Gaya, Belén Martínez-Varela, Alicia Vila-Costa, Maria Casal, Paulo Cerro-Gálvez, Elena Berrojalbiz, Naiara Lundin, Daniel Vidal, Montserrat Mompeán, Carmen Bode, Antonio Jiménez, Begoña Dachs, Jordi |
author_sort |
González-Gaya, Belén |
title |
Biodegradation as an important sink of aromatic hydrocarbons in the oceans |
title_short |
Biodegradation as an important sink of aromatic hydrocarbons in the oceans |
title_full |
Biodegradation as an important sink of aromatic hydrocarbons in the oceans |
title_fullStr |
Biodegradation as an important sink of aromatic hydrocarbons in the oceans |
title_full_unstemmed |
Biodegradation as an important sink of aromatic hydrocarbons in the oceans |
title_sort |
biodegradation as an important sink of aromatic hydrocarbons in the oceans |
publisher |
Springer Nature |
publishDate |
2019 |
url |
http://hdl.handle.net/10261/177338 https://doi.org/10.1038/s41561-018-0285-3 |
long_lat |
ENVELOPE(-61.581,-61.581,-62.824,-62.824) |
geographic |
Antarctic Caballero Indian Pacific |
geographic_facet |
Antarctic Caballero Indian Pacific |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
Sí doi:10.1038/s41561-018-0285-3 issn: 1752-0894 e-issn: 1752-0908 Nature Geoscience 12: 119-125 (2019) http://hdl.handle.net/10261/177338 |
op_rights |
none |
op_doi |
https://doi.org/10.1038/s41561-018-0285-3 |
container_title |
Nature Geoscience |
container_volume |
12 |
container_issue |
2 |
container_start_page |
119 |
op_container_end_page |
125 |
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1790594116855267328 |