{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,9]],"date-time":"2026-10-09T14:45:05Z","timestamp":1791557105570,"version":"4.3.4"},"reference-count":91,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2020,11,7]],"date-time":"2020-11-07T00:00:00Z","timestamp":1604707200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100002850","name":"Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico","doi-asserted-by":"publisher","award":["1200870"],"award-info":[{"award-number":["1200870"]}],"id":[{"id":"10.13039\/501100002850","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100015634","name":"INACH","doi-asserted-by":"publisher","award":["RT-25_16"],"award-info":[{"award-number":["RT-25_16"]}],"id":[{"id":"10.13039\/501100015634","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100015634","name":"INACH","doi-asserted-by":"publisher","award":["MT-05_13"],"award-info":[{"award-number":["MT-05_13"]}],"id":[{"id":"10.13039\/501100015634","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Microorganisms"],"abstract":"<jats:p>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.<\/jats:p>","DOI":"10.3390\/microorganisms8111749","type":"journal-article","created":{"date-parts":[[2020,11,8]],"date-time":"2020-11-08T19:03:37Z","timestamp":1604862217000},"page":"1749","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":51,"title":["Effect of Co-contamination by PAHs and Heavy Metals on Bacterial Communities of Diesel Contaminated Soils of South Shetland Islands, Antarctica"],"prefix":"10.3390","volume":"8","author":[{"given":"Alejandro","family":"Gran-Scheuch","sequence":"first","affiliation":[{"name":"BioNanotechnology and Microbiology Lab, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias de la Vida, Universidad Andres Bello, Republica # 330, Santiago 8370146, Chile"},{"name":"Departamento de Qu\u00edmica Inorg\u00e1nica y Anal\u00edtica, Facultad de Ciencias Qu\u00edmicas y Farmac\u00e9uticas, Universidad de Chile, Sergio Livingstone Pohlhammer # 1007, Santiago 8380000, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Javiera","family":"Ramos-Zu\u00f1iga","sequence":"additional","affiliation":[{"name":"BioNanotechnology and Microbiology Lab, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias de la Vida, Universidad Andres Bello, Republica # 330, Santiago 8370146, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Edwar","family":"Fuentes","sequence":"additional","affiliation":[{"name":"Departamento de Qu\u00edmica Inorg\u00e1nica y Anal\u00edtica, Facultad de Ciencias Qu\u00edmicas y Farmac\u00e9uticas, Universidad de Chile, Sergio Livingstone Pohlhammer # 1007, Santiago 8380000, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Denisse","family":"Bravo","sequence":"additional","affiliation":[{"name":"Laboratorio de Microbiolog\u00eda Oral, Facultad de Odontolog\u00eda, Universidad de Chile, Sergio Livingstone Pohlhammer # 943, Santiago 8380453, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9506-1716","authenticated-orcid":false,"given":"Jos\u00e9 M.","family":"P\u00e9rez-Donoso","sequence":"additional","affiliation":[{"name":"BioNanotechnology and Microbiology Lab, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias de la Vida, Universidad Andres Bello, Republica # 330, Santiago 8370146, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2020,11,7]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"341","DOI":"10.1016\/j.marpolbul.2013.08.037","article-title":"Sources and transport of As, Cu, Cd and Pb in the environmental compartments of Deception Island, Antarctica","volume":"77","author":"Mota","year":"2013","journal-title":"Mar. 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