Snow-Dependent Biogeochemical Cycling of Polycyclic Aromatic Hydrocarbons at Coastal Antarctica
The temporal trend of polycyclic aromatic hydrocarbons (PAHs) in coastal waters with highly dynamic sources and sinks is largely unknown, especially for polar regions. Here, we show the concurrent measurements of 73 individual PAHs and environmental data, including the composition of the bacterial c...
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American Chemical Society
2023
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Online Access: | http://hdl.handle.net/10261/288313 https://doi.org/10.1021/acs.est.2c05583 https://api.elsevier.com/content/abstract/scopus_id/85146543650 |
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ftcsic:oai:digital.csic.es:10261/288313 2024-02-11T09:57:08+01:00 Snow-Dependent Biogeochemical Cycling of Polycyclic Aromatic Hydrocarbons at Coastal Antarctica Iriarte, Jon Dachs, Jordi Casas, Gemma Martínez-Varela, Alicia Berrojalbiz, Naiara Vila-Costa, Maria orcid: 2023-01-31 http://hdl.handle.net/10261/288313 https://doi.org/10.1021/acs.est.2c05583 https://api.elsevier.com/content/abstract/scopus_id/85146543650 en eng American Chemical Society Environmental science & technology Publisher's version https://doi.org/10.1021/acs.est.2c05583 Sí Environmental Science and Technology 57 (4): 1625–1636 (2023) 0013936X http://hdl.handle.net/10261/288313 doi:10.1021/acs.est.2c05583 36655903 2-s2.0-85146543650 https://api.elsevier.com/content/abstract/scopus_id/85146543650 open Polycyclic aromatic hydrocarbons PAH Biodegradation Biogeochemical processes Coastal Antarctica Marine bacterial communities artículo 2023 ftcsic https://doi.org/10.1021/acs.est.2c05583 2024-01-16T11:33:53Z The temporal trend of polycyclic aromatic hydrocarbons (PAHs) in coastal waters with highly dynamic sources and sinks is largely unknown, especially for polar regions. Here, we show the concurrent measurements of 73 individual PAHs and environmental data, including the composition of the bacterial community, during three austral summers at coastal Livingston (2015 and 2018) and Deception (2017) islands (Antarctica). The Livingston 2015 campaign was characterized by a larger snow melting input of PAHs and nutrients. The assessment of PAH diagnostic ratios, such as parent to alkyl-PAHs or LMW to HMW PAHs, showed that there was a larger biodegradation during the Livingston 2015 campaign than in the Deception 2017 and Livingston 2018 campaigns. The biogeochemical cycling, including microbial degradation, was thus yearly dependent on snow-derived inputs of matter, including PAHs, consistent with the microbial community significantly different between the different campaigns. The bivariate correlations between bacterial taxa and PAH concentrations showed that a decrease in PAH concentrations was concurrent with the higher abundance of some bacterial taxa, specifically the order Pseudomonadales in the class Gammaproteobacteria, known facultative hydrocarbonoclastic bacteria previously reported in degradation studies of oil spills. The work shows the potential for elucidation of biogeochemical processes by intensive field-derived time series, even in the harsh and highly variable Antarctic environment. This work has been supported by the Spanish Ministry of Science and Innovation (MCIN) through projects REMARCA (CTM2012-34673), SENTINEL (CTM2015-70535), ANTOM (PGC2018-096612-B-100), MIQAS (PID2021-128084OB-I00), and PANTOC (PID2021-127769NB-I00). J. Iriarte acknowledges the predoctoral FPU fellowship (FPU19/02782) funded by the Spanish Ministry of Universities. Dr. Daniel Lundin is acknowledged for his support in bioinformatic analyses. The research group of Global Change and Genomic Biogeochemistry receives support ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Digital.CSIC (Spanish National Research Council) Antarctic Austral Environmental Science & Technology 57 4 1625 1636 |
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Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Polycyclic aromatic hydrocarbons PAH Biodegradation Biogeochemical processes Coastal Antarctica Marine bacterial communities |
spellingShingle |
Polycyclic aromatic hydrocarbons PAH Biodegradation Biogeochemical processes Coastal Antarctica Marine bacterial communities Iriarte, Jon Dachs, Jordi Casas, Gemma Martínez-Varela, Alicia Berrojalbiz, Naiara Vila-Costa, Maria Snow-Dependent Biogeochemical Cycling of Polycyclic Aromatic Hydrocarbons at Coastal Antarctica |
topic_facet |
Polycyclic aromatic hydrocarbons PAH Biodegradation Biogeochemical processes Coastal Antarctica Marine bacterial communities |
description |
The temporal trend of polycyclic aromatic hydrocarbons (PAHs) in coastal waters with highly dynamic sources and sinks is largely unknown, especially for polar regions. Here, we show the concurrent measurements of 73 individual PAHs and environmental data, including the composition of the bacterial community, during three austral summers at coastal Livingston (2015 and 2018) and Deception (2017) islands (Antarctica). The Livingston 2015 campaign was characterized by a larger snow melting input of PAHs and nutrients. The assessment of PAH diagnostic ratios, such as parent to alkyl-PAHs or LMW to HMW PAHs, showed that there was a larger biodegradation during the Livingston 2015 campaign than in the Deception 2017 and Livingston 2018 campaigns. The biogeochemical cycling, including microbial degradation, was thus yearly dependent on snow-derived inputs of matter, including PAHs, consistent with the microbial community significantly different between the different campaigns. The bivariate correlations between bacterial taxa and PAH concentrations showed that a decrease in PAH concentrations was concurrent with the higher abundance of some bacterial taxa, specifically the order Pseudomonadales in the class Gammaproteobacteria, known facultative hydrocarbonoclastic bacteria previously reported in degradation studies of oil spills. The work shows the potential for elucidation of biogeochemical processes by intensive field-derived time series, even in the harsh and highly variable Antarctic environment. This work has been supported by the Spanish Ministry of Science and Innovation (MCIN) through projects REMARCA (CTM2012-34673), SENTINEL (CTM2015-70535), ANTOM (PGC2018-096612-B-100), MIQAS (PID2021-128084OB-I00), and PANTOC (PID2021-127769NB-I00). J. Iriarte acknowledges the predoctoral FPU fellowship (FPU19/02782) funded by the Spanish Ministry of Universities. Dr. Daniel Lundin is acknowledged for his support in bioinformatic analyses. The research group of Global Change and Genomic Biogeochemistry receives support ... |
author2 |
orcid: |
format |
Article in Journal/Newspaper |
author |
Iriarte, Jon Dachs, Jordi Casas, Gemma Martínez-Varela, Alicia Berrojalbiz, Naiara Vila-Costa, Maria |
author_facet |
Iriarte, Jon Dachs, Jordi Casas, Gemma Martínez-Varela, Alicia Berrojalbiz, Naiara Vila-Costa, Maria |
author_sort |
Iriarte, Jon |
title |
Snow-Dependent Biogeochemical Cycling of Polycyclic Aromatic Hydrocarbons at Coastal Antarctica |
title_short |
Snow-Dependent Biogeochemical Cycling of Polycyclic Aromatic Hydrocarbons at Coastal Antarctica |
title_full |
Snow-Dependent Biogeochemical Cycling of Polycyclic Aromatic Hydrocarbons at Coastal Antarctica |
title_fullStr |
Snow-Dependent Biogeochemical Cycling of Polycyclic Aromatic Hydrocarbons at Coastal Antarctica |
title_full_unstemmed |
Snow-Dependent Biogeochemical Cycling of Polycyclic Aromatic Hydrocarbons at Coastal Antarctica |
title_sort |
snow-dependent biogeochemical cycling of polycyclic aromatic hydrocarbons at coastal antarctica |
publisher |
American Chemical Society |
publishDate |
2023 |
url |
http://hdl.handle.net/10261/288313 https://doi.org/10.1021/acs.est.2c05583 https://api.elsevier.com/content/abstract/scopus_id/85146543650 |
geographic |
Antarctic Austral |
geographic_facet |
Antarctic Austral |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
Environmental science & technology Publisher's version https://doi.org/10.1021/acs.est.2c05583 Sí Environmental Science and Technology 57 (4): 1625–1636 (2023) 0013936X http://hdl.handle.net/10261/288313 doi:10.1021/acs.est.2c05583 36655903 2-s2.0-85146543650 https://api.elsevier.com/content/abstract/scopus_id/85146543650 |
op_rights |
open |
op_doi |
https://doi.org/10.1021/acs.est.2c05583 |
container_title |
Environmental Science & Technology |
container_volume |
57 |
container_issue |
4 |
container_start_page |
1625 |
op_container_end_page |
1636 |
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1790608903316176896 |