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Induced tolerance in situ to chronically PAH exposed ammonium oxidizers

Fredrik J. Lindgren (Institutionen för mekanik och maritima vetenskaper, Maritima studier) ; Ida-Maja Hassellöv (Institutionen för mekanik och maritima vetenskaper, Maritima studier) ; Ingela Dahllöf ; Anders Östin ; Jenny Rafffelt Nyholm
Marine Pollution Bulletin (0025-326X). Vol. 120 (2017), 1-2, p. 333-339.
[Artikel, refereegranskad vetenskaplig]

Sediment was sampled in the vicinity of a long-term source of Polycyclic Aromatic Hydrocarbons (PAHs) to evaluate whether tolerance can be induced in situ. Total PAH concentrations as well as the bioavailable PAHs were measured, and for nine PAHs the pore water concentration could be calculated. An induced tolerance in the ammonium oxidizing community was detected at the site with highest PAH concentration and tolerance was strongest, although not significantly, correlated to bioavailable alkylated PAHs. In addition, the tolerant microbial community showed a significant lower baseline capability for nitrification with an on average 35% reduction compared to the other sites. Meiofaunal community structure differed between all sites, and the difference was significantly correlated to bioavailable alkylated PAHs and PAH31 concentrations. The results suggest that in order to judge magnitude of long-term effects, the bioavailable fraction is to be preferred, and when possible as estimation of the freely dissolved concentration.

Nyckelord: PAHs, In situ, Microbial community, Bioavailability, Tolerance, Pollution Induced Community Tolerance (PICT)

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Denna post skapades 2017-08-15. Senast ändrad 2017-10-20.
CPL Pubid: 251131


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Institutionen för mekanik och maritima vetenskaper, Maritima studier
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