Effect of co-contamination by pahs and heavy metals on bacterial communities of diesel contaminated soils of south shetland islands, Antarctica
Diesel oil is the main source of energy used in Antarctica. Since diesel is composed of toxic compounds such as polycyclic aromatic hydrocarbons (PAHs) and heavy metals, it represents a constant threat to the organisms inhabiting this continent. In the present study, we characterized the chemical an...
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Online Access: | https://doi.org/10.3390/microorganisms8111749 https://repositorio.uchile.cl/handle/2250/179655 |
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ftunivchile:oai:repositorio.uchile.cl:2250/179655 2023-05-15T13:34:34+02:00 Effect of co-contamination by pahs and heavy metals on bacterial communities of diesel contaminated soils of south shetland islands, Antarctica Gran-Scheuch, Alejandro Ramos Zúñiga, Javiera Fuentes Pérez, Edwar Bravo Rodríguez, Denisse Pérez Donoso, José M. 2020 application/pdf https://doi.org/10.3390/microorganisms8111749 https://repositorio.uchile.cl/handle/2250/179655 en eng MDPI Microorganisms 2020, 8, 1749 doi:10.3390/microorganisms8111749 https://repositorio.uchile.cl/handle/2250/179655 Attribution-NonCommercial-NoDerivs 3.0 Chile http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ CC-BY-NC-ND Microorganisms Antarctica Co-contamination Microbial population PAHs Cadmium PAH-degrading bacteria Artículo de revista 2020 ftunivchile https://doi.org/10.3390/microorganisms8111749 2022-12-25T00:51:38Z Diesel oil is the main source of energy used in Antarctica. Since diesel is composed of toxic compounds such as polycyclic aromatic hydrocarbons (PAHs) and heavy metals, it represents a constant threat to the organisms inhabiting this continent. In the present study, we characterized the chemical and biological parameters of diesel-exposed soils obtained from King George Island in Antarctica. Contaminated soils present PAH concentrations 1000 times higher than non-exposed soils. Some contaminated soil samples also exhibited high concentrations of cadmium and lead. A 16S metagenome analysis revealed the effect of co-contamination on bacterial communities. An increase in the relative abundance of bacteria known as PAH degraders or metal resistant was determined in co-contaminated soils. Accordingly, the soil containing higher amounts of PAHs exhibited increased dehydrogenase activity than control soils, suggesting that the microorganisms present can metabolize diesel. The inhibitory effect on soil metabolism produced by cadmium was lower in diesel-contaminated soils. Moreover, diesel-contaminated soils contain higher amounts of cultivable heterotrophic, cadmium-tolerant, and PAH-degrading bacteria than control soils. Obtained results indicate that diesel contamination at King George island has affected microbial communities, favoring the presence of microorganisms capable of utilizing PAHs as a carbon source, even in the presence of heavy metals. Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) CONICYT FONDECYT 1200870 Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) INACHMT-05_13 INACH RT-25-16 Article in Journal/Newspaper Antarc* Antarctica King George Island South Shetland Islands Universidad de Chile: Repositorio académico Inach ENVELOPE(-60.783,-60.783,-62.467,-62.467) King George Island South Shetland Islands Microorganisms 8 11 1749 |
institution |
Open Polar |
collection |
Universidad de Chile: Repositorio académico |
op_collection_id |
ftunivchile |
language |
English |
topic |
Antarctica Co-contamination Microbial population PAHs Cadmium PAH-degrading bacteria |
spellingShingle |
Antarctica Co-contamination Microbial population PAHs Cadmium PAH-degrading bacteria Gran-Scheuch, Alejandro Ramos Zúñiga, Javiera Fuentes Pérez, Edwar Bravo Rodríguez, Denisse Pérez Donoso, José M. Effect of co-contamination by pahs and heavy metals on bacterial communities of diesel contaminated soils of south shetland islands, Antarctica |
topic_facet |
Antarctica Co-contamination Microbial population PAHs Cadmium PAH-degrading bacteria |
description |
Diesel oil is the main source of energy used in Antarctica. Since diesel is composed of toxic compounds such as polycyclic aromatic hydrocarbons (PAHs) and heavy metals, it represents a constant threat to the organisms inhabiting this continent. In the present study, we characterized the chemical and biological parameters of diesel-exposed soils obtained from King George Island in Antarctica. Contaminated soils present PAH concentrations 1000 times higher than non-exposed soils. Some contaminated soil samples also exhibited high concentrations of cadmium and lead. A 16S metagenome analysis revealed the effect of co-contamination on bacterial communities. An increase in the relative abundance of bacteria known as PAH degraders or metal resistant was determined in co-contaminated soils. Accordingly, the soil containing higher amounts of PAHs exhibited increased dehydrogenase activity than control soils, suggesting that the microorganisms present can metabolize diesel. The inhibitory effect on soil metabolism produced by cadmium was lower in diesel-contaminated soils. Moreover, diesel-contaminated soils contain higher amounts of cultivable heterotrophic, cadmium-tolerant, and PAH-degrading bacteria than control soils. Obtained results indicate that diesel contamination at King George island has affected microbial communities, favoring the presence of microorganisms capable of utilizing PAHs as a carbon source, even in the presence of heavy metals. Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) CONICYT FONDECYT 1200870 Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) INACHMT-05_13 INACH RT-25-16 |
format |
Article in Journal/Newspaper |
author |
Gran-Scheuch, Alejandro Ramos Zúñiga, Javiera Fuentes Pérez, Edwar Bravo Rodríguez, Denisse Pérez Donoso, José M. |
author_facet |
Gran-Scheuch, Alejandro Ramos Zúñiga, Javiera Fuentes Pérez, Edwar Bravo Rodríguez, Denisse Pérez Donoso, José M. |
author_sort |
Gran-Scheuch, Alejandro |
title |
Effect of co-contamination by pahs and heavy metals on bacterial communities of diesel contaminated soils of south shetland islands, Antarctica |
title_short |
Effect of co-contamination by pahs and heavy metals on bacterial communities of diesel contaminated soils of south shetland islands, Antarctica |
title_full |
Effect of co-contamination by pahs and heavy metals on bacterial communities of diesel contaminated soils of south shetland islands, Antarctica |
title_fullStr |
Effect of co-contamination by pahs and heavy metals on bacterial communities of diesel contaminated soils of south shetland islands, Antarctica |
title_full_unstemmed |
Effect of co-contamination by pahs and heavy metals on bacterial communities of diesel contaminated soils of south shetland islands, Antarctica |
title_sort |
effect of co-contamination by pahs and heavy metals on bacterial communities of diesel contaminated soils of south shetland islands, antarctica |
publisher |
MDPI |
publishDate |
2020 |
url |
https://doi.org/10.3390/microorganisms8111749 https://repositorio.uchile.cl/handle/2250/179655 |
long_lat |
ENVELOPE(-60.783,-60.783,-62.467,-62.467) |
geographic |
Inach King George Island South Shetland Islands |
geographic_facet |
Inach King George Island South Shetland Islands |
genre |
Antarc* Antarctica King George Island South Shetland Islands |
genre_facet |
Antarc* Antarctica King George Island South Shetland Islands |
op_source |
Microorganisms |
op_relation |
Microorganisms 2020, 8, 1749 doi:10.3390/microorganisms8111749 https://repositorio.uchile.cl/handle/2250/179655 |
op_rights |
Attribution-NonCommercial-NoDerivs 3.0 Chile http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.3390/microorganisms8111749 |
container_title |
Microorganisms |
container_volume |
8 |
container_issue |
11 |
container_start_page |
1749 |
_version_ |
1766054423017029632 |