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Meiofaunal and bacterial community response to diesel additions in a microcosm study

Fredrik J. Lindgren (Institutionen för sjöfart och marin teknik, Maritime Operations ) ; Ida-Maja Hassellöv (Institutionen för sjöfart och marin teknik, Maritime Operations ) ; Ingela Dahllöf
Marine Pollution Bulletin (0025-326X). Vol. 64 (2012), 3, p. 595-601.
[Artikel, refereegranskad vetenskaplig]

Effects of low PAH-containing diesel were studied in a 60-day microcosm experiment at PAH concentrations 130, 1300 and 13,000 lg/kg sediment. Nutrient fluxes, potential nitrification and meiofaunal community composition were analysed at three time points. Changed PNOx-fluxes indicated reduced sediment nitrification in Medium and High with time, in agreement with lowered potential nitrification rates in all treatments. Reduction in silicate and phosphate fluxes over time suggested severe effects on activity of meiofauna. Reduced activity increased the anoxic sediment layer, which could have contributed to the changed PNOx-fluxes. There were significant differences in meiofaunal community composition after 30 and 60 days in Medium and High. Changes were due to increasing numbers of harpacticoids and the foraminiferan group Rotaliina, as well as decreasing numbers of Nematodes and the foraminiferan group Reophax. In spite of the low PAH-level, small additions of this diesel can still have pronounced effects on meiofaunal and bacterial communities.

Nyckelord: Community response, Meiofauna, Bacteria, PAH, Nutrient fluxes, Non-lethal effects

Denna post skapades 2012-03-06. Senast ändrad 2015-02-26.
CPL Pubid: 155656


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Institutioner (Chalmers)

Institutionen för sjöfart och marin teknik, Maritime Operations (2012-2014)
Institutionen för biologi och miljövetenskap (GU)


Biologiska vetenskaper
Marin ekologi

Chalmers infrastruktur

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Denna publikation är ett resultat av följande projekt:

Association of European marine biological laboratories (ASSEMBLE) (EC/FP7/227799)