Bacterial Diversity in Old Hydrocarbon Polluted Sediments of Ecuadorian Amazon River Basins
The Ecuadorian Amazon rainforest stands out as one of the world’s most biodiverse regions, yet faces significant threats due to oil extraction activities dating back to the 1970s in the northeastern provinces. This research investigates the environmental and societal consequences of prolonged petroleum exploitation and oil spills in Ecuador’s Amazon. Conducted in June 2015, the study involved a comprehensive analysis of freshwater sediment samples from 24 locations in the Rio Aguarico and Napo basins. Parameters such as water and air temperature, conductivity, soil pH, and hydrocarbon concentrations were examined. Total petroleum hydrocarbon (TPH) concentrations ranged from 9.4 to 847.4 mg kg−1, with polycyclic aromatic hydrocarbon (PAH) levels varying from 10.15 to 711.1 mg kg−1. The pristane/phytane ratio indicated historic hydrocarbon pollution in 8 of the 15 chemically analyzed sediments. Using non-culturable techniques (Illumina), bacterial analyses identified over 350 ASV, with prominent families including Comamonadaceae, Chitinophagaceae, Anaeromyxobacteraceae, Sphingomonadaceae, and Xanthobacteraceae. Bacterial diversity, assessed in eight samples, exhibited a positive correlation with PAH concentrations. The study provides insights into how microbial communities respond to varying levels of hydrocarbon pollution, shedding light on the enduring impact of oil exploitation in the Amazonian region. Its objective is to deepen our understanding of the environmental and human well-being in the affected area, underscoring the pressing need for remedial actions in the face of ongoing ecological challenges.
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Language: | English |
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Multidisciplinary Digital Publishing Institute
2024-02
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Subjects: | Ecuadorian Amazonia, River sediments, Freshwater, Hydrocarbon pollution, Biomarkers, Bacterial diversity, |
Online Access: | http://hdl.handle.net/10261/356528 |
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dig-inia-es-10261-3565282024-05-13T10:20:37Z Bacterial Diversity in Old Hydrocarbon Polluted Sediments of Ecuadorian Amazon River Basins Corral-García, Lara S. Molina, María Carmen Bautista, Luis Fernando Simarro, Raquel Espinosa, Carlos Iván Gorines-Cordero, Guillermo González-Benítez, Natalia Centro para la Innovación, Transferencia de Tecnología y del Conocimiento (España) Universidad Técnica Particular de Loja Ecuadorian Amazonia River sediments Freshwater Hydrocarbon pollution Biomarkers Bacterial diversity The Ecuadorian Amazon rainforest stands out as one of the world’s most biodiverse regions, yet faces significant threats due to oil extraction activities dating back to the 1970s in the northeastern provinces. This research investigates the environmental and societal consequences of prolonged petroleum exploitation and oil spills in Ecuador’s Amazon. Conducted in June 2015, the study involved a comprehensive analysis of freshwater sediment samples from 24 locations in the Rio Aguarico and Napo basins. Parameters such as water and air temperature, conductivity, soil pH, and hydrocarbon concentrations were examined. Total petroleum hydrocarbon (TPH) concentrations ranged from 9.4 to 847.4 mg kg−1, with polycyclic aromatic hydrocarbon (PAH) levels varying from 10.15 to 711.1 mg kg−1. The pristane/phytane ratio indicated historic hydrocarbon pollution in 8 of the 15 chemically analyzed sediments. Using non-culturable techniques (Illumina), bacterial analyses identified over 350 ASV, with prominent families including Comamonadaceae, Chitinophagaceae, Anaeromyxobacteraceae, Sphingomonadaceae, and Xanthobacteraceae. Bacterial diversity, assessed in eight samples, exhibited a positive correlation with PAH concentrations. The study provides insights into how microbial communities respond to varying levels of hydrocarbon pollution, shedding light on the enduring impact of oil exploitation in the Amazonian region. Its objective is to deepen our understanding of the environmental and human well-being in the affected area, underscoring the pressing need for remedial actions in the face of ongoing ecological challenges. This research was funded by the Center for Innovation, Technology and Knowledge Transfer (CINTTEC) within the project 2015/00108/001—M1299 of the Universidad Técnica Particular de Loja/Universidad Católica de Loja, Ecuador. Peer reviewed 2024-05-09T12:43:22Z 2024-05-09T12:43:22Z 2024-02 artículo http://purl.org/coar/resource_type/c_6501 Toxics 12(2): 119 (2024) http://hdl.handle.net/10261/356528 10.3390/toxics12020119 2305-6304 en Publisher's version https://doi.org/10.3390/toxics12020119 Sí open application/pdf Multidisciplinary Digital Publishing Institute |
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Ecuadorian Amazonia River sediments Freshwater Hydrocarbon pollution Biomarkers Bacterial diversity Ecuadorian Amazonia River sediments Freshwater Hydrocarbon pollution Biomarkers Bacterial diversity |
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Ecuadorian Amazonia River sediments Freshwater Hydrocarbon pollution Biomarkers Bacterial diversity Ecuadorian Amazonia River sediments Freshwater Hydrocarbon pollution Biomarkers Bacterial diversity Corral-García, Lara S. Molina, María Carmen Bautista, Luis Fernando Simarro, Raquel Espinosa, Carlos Iván Gorines-Cordero, Guillermo González-Benítez, Natalia Bacterial Diversity in Old Hydrocarbon Polluted Sediments of Ecuadorian Amazon River Basins |
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The Ecuadorian Amazon rainforest stands out as one of the world’s most biodiverse regions, yet faces significant threats due to oil extraction activities dating back to the 1970s in the northeastern provinces. This research investigates the environmental and societal consequences of prolonged petroleum exploitation and oil spills in Ecuador’s Amazon. Conducted in June 2015, the study involved a comprehensive analysis of freshwater sediment samples from 24 locations in the Rio Aguarico and Napo basins. Parameters such as water and air temperature, conductivity, soil pH, and hydrocarbon concentrations were examined. Total petroleum hydrocarbon (TPH) concentrations ranged from 9.4 to 847.4 mg kg−1, with polycyclic aromatic hydrocarbon (PAH) levels varying from 10.15 to 711.1 mg kg−1. The pristane/phytane ratio indicated historic hydrocarbon pollution in 8 of the 15 chemically analyzed sediments. Using non-culturable techniques (Illumina), bacterial analyses identified over 350 ASV, with prominent families including Comamonadaceae, Chitinophagaceae, Anaeromyxobacteraceae, Sphingomonadaceae, and Xanthobacteraceae. Bacterial diversity, assessed in eight samples, exhibited a positive correlation with PAH concentrations. The study provides insights into how microbial communities respond to varying levels of hydrocarbon pollution, shedding light on the enduring impact of oil exploitation in the Amazonian region. Its objective is to deepen our understanding of the environmental and human well-being in the affected area, underscoring the pressing need for remedial actions in the face of ongoing ecological challenges. |
author2 |
Centro para la Innovación, Transferencia de Tecnología y del Conocimiento (España) |
author_facet |
Centro para la Innovación, Transferencia de Tecnología y del Conocimiento (España) Corral-García, Lara S. Molina, María Carmen Bautista, Luis Fernando Simarro, Raquel Espinosa, Carlos Iván Gorines-Cordero, Guillermo González-Benítez, Natalia |
format |
artículo |
topic_facet |
Ecuadorian Amazonia River sediments Freshwater Hydrocarbon pollution Biomarkers Bacterial diversity |
author |
Corral-García, Lara S. Molina, María Carmen Bautista, Luis Fernando Simarro, Raquel Espinosa, Carlos Iván Gorines-Cordero, Guillermo González-Benítez, Natalia |
author_sort |
Corral-García, Lara S. |
title |
Bacterial Diversity in Old Hydrocarbon Polluted Sediments of Ecuadorian Amazon River Basins |
title_short |
Bacterial Diversity in Old Hydrocarbon Polluted Sediments of Ecuadorian Amazon River Basins |
title_full |
Bacterial Diversity in Old Hydrocarbon Polluted Sediments of Ecuadorian Amazon River Basins |
title_fullStr |
Bacterial Diversity in Old Hydrocarbon Polluted Sediments of Ecuadorian Amazon River Basins |
title_full_unstemmed |
Bacterial Diversity in Old Hydrocarbon Polluted Sediments of Ecuadorian Amazon River Basins |
title_sort |
bacterial diversity in old hydrocarbon polluted sediments of ecuadorian amazon river basins |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2024-02 |
url |
http://hdl.handle.net/10261/356528 |
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