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Broman, E., Abdelgadir, M., Bonaglia, S., Forsberg, S. C., Wikström, J., Gunnarsson, J. S., . . . Sjöling, S. (2023). Long-Term Pollution Does Not Inhibit Denitrification and DNRA by Adapted Benthic Microbial Communities. Microbial Ecology, 86, 2357-2372
Open this publication in new window or tab >>Long-Term Pollution Does Not Inhibit Denitrification and DNRA by Adapted Benthic Microbial Communities
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2023 (English)In: Microbial Ecology, ISSN 0095-3628, E-ISSN 1432-184X, Vol. 86, p. 2357-2372Article in journal (Refereed) 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.

Place, publisher, year, edition, pages
Elsevier, 2023
Keywords
Baltic Sea, Chlorinated dibenzofurans, Dioxins, Metagenome, Nitrogen cycling, Sediment
National Category
Microbiology
Research subject
Environmental Studies; Baltic and East European studies
Identifiers
urn:nbn:se:sh:diva-51571 (URN)10.1007/s00248-023-02241-7 (DOI)000994100600004 ()37222807 (PubMedID)2-s2.0-85160251009 (Scopus ID)
Funder
The Foundation for Baltic and East European Studies, 77/2017Swedish Environmental Protection Agency, 2020–0002Swedish Geotechnical Institute, 1.1–1602-0106
Available from: 2023-06-01 Created: 2023-06-01 Last updated: 2023-11-24Bibliographically approved
Gullström, M., Dahl, M., Lindén, O., Vorhies, F., Forsberg, S., Ismail, R. O. & Björk, M. (2021). Coastal blue carbon stocks in Tanzania and Mozambique: Support for climate adaptation and mitigation actions. Gland: IUCN, International Union for Conservation of Nature
Open this publication in new window or tab >>Coastal blue carbon stocks in Tanzania and Mozambique: Support for climate adaptation and mitigation actions
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2021 (English)Report (Other academic)
Place, publisher, year, edition, pages
Gland: IUCN, International Union for Conservation of Nature, 2021. p. 69
Keywords
Mangroves, Sea grass, Salt marshes, Carbon, Habitats, Marine protected areas, Tanzania, Mozambique
National Category
Biological Sciences Environmental Management Environmental Sciences
Research subject
Environmental Studies
Identifiers
urn:nbn:se:sh:diva-51572 (URN)
Available from: 2023-06-01 Created: 2023-06-01 Last updated: 2023-06-01Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-6260-776X

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