Induced tolerance in situ to chronically PAH exposed ammonium oxidizers
Autor: | Jenny Rattfelt Nyholm, J. Fredrik Lindgren, Ida-Maja Hassellöv, Anders Östin, Ingela Dahllöf |
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Rok vydání: | 2017 |
Předmět: |
0106 biological sciences
In situ Geologic Sediments Biological Availability 010501 environmental sciences Aquatic Science Oceanography 01 natural sciences chemistry.chemical_compound Ammonium Compounds Oxidizing agent polycyclic compounds Ammonium Polycyclic Aromatic Hydrocarbons 0105 earth and related environmental sciences Bacteria Chemistry 010604 marine biology & hydrobiology Sediment Adaptation Physiological Pollution Bioavailability Microbial population biology Environmental chemistry Nitrification Water Pollutants Chemical |
Zdroj: | Marine Pollution Bulletin. 120:333-339 |
ISSN: | 0025-326X |
Popis: | 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. |
Databáze: | OpenAIRE |
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