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Long-Term Pollution Does Not Inhibit Denitrification and DNRA by Adapted Benthic Microbial Communities
Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap. Stockholm University, Sweden.ORCID-id: 0000-0001-9005-5168
Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.ORCID-id: 0000-0002-5636-3957
University of Gothenburg, Sweden.
Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap. Stockholm University, Sweden.ORCID-id: 0000-0002-6260-776X
Vise andre og tillknytning
2023 (engelsk)Inngår i: Microbial Ecology, ISSN 0095-3628, E-ISSN 1432-184X, Vol. 86, s. 2357-2372Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Denitrification in sediments is a key microbial process that removes excess fixed nitrogen, while dissimilatory nitrate reduction to ammonium (DNRA) converts nitrate to ammonium. Although microorganisms are responsible for essential nitrogen (N) cycling, it is not yet fully understood how these microbially mediated processes respond to toxic hydrophobic organic compounds (HOCs) and metals. In this study, we sampled long-term polluted sediment from the outer harbor of Oskarshamn (Baltic Sea), measured denitrification and DNRA rates, and analyzed taxonomic structure and N-cycling genes of microbial communities using metagenomics. Results showed that denitrification and DNRA rates were within the range of a national reference site and other unpolluted sites in the Baltic Sea, indicating that long-term pollution did not significantly affect these processes. Furthermore, our results indicate an adaptation to metal pollution by the N-cycling microbial community. These findings suggest that denitrification and DNRA rates are affected more by eutrophication and organic enrichment than by historic pollution of metals and organic contaminants.

sted, utgiver, år, opplag, sider
Elsevier, 2023. Vol. 86, s. 2357-2372
Emneord [en]
Baltic Sea, Chlorinated dibenzofurans, Dioxins, Metagenome, Nitrogen cycling, Sediment
HSV kategori
Forskningsprogram
Miljövetenskapliga studier; Östersjö- och Östeuropaforskning
Identifikatorer
URN: urn:nbn:se:sh:diva-51571DOI: 10.1007/s00248-023-02241-7ISI: 000994100600004PubMedID: 37222807Scopus ID: 2-s2.0-85160251009OAI: oai:DiVA.org:sh-51571DiVA, id: diva2:1761610
Ingår i projekt
Response and recovery of benthic biodiversity and ecosystem functions to chemical pollution and eutrophication, The Foundation for Baltic and East European Studies
Forskningsfinansiär
The Foundation for Baltic and East European Studies, 77/2017Swedish Environmental Protection Agency, 2020–0002Swedish Geotechnical Institute, 1.1–1602-0106Tilgjengelig fra: 2023-06-01 Laget: 2023-06-01 Sist oppdatert: 2023-11-24bibliografisk kontrollert

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Broman, EliasAbdelgadir, MohanadForsberg, Sara C.Sjöling, Sara

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