|Structural and metabolic responses of a subtidal sediment community to water extracts of oil|
Bakke, T.; Dale, T.; Thingstad, T.F. (1982). Structural and metabolic responses of a subtidal sediment community to water extracts of oil. Neth. J. Sea Res. 16: 524-537
In: Netherlands Journal of Sea Research. Netherlands Institute for Sea Research (NIOZ): Groningen; Den Burg. ISSN 0077-7579, more
|Authors|| || Top |
- Bakke, T.
- Dale, T.
- Thingstad, T.F.
A 3 m³ area of a natural sandy bottom at 8m depth was exposed to sea water extracts of diesel oil during 6 periods of 14 days from May to December 1979. The sediment and bottom water were artificially enclosed during exposure. An adjacent enclosed area of the same size acted as reference. The peak increase in total hydrocarbons over the treated sediment was in mean 114 ug.l-1, and gave a significant increase in the content of aromatic hydrocarbons in the sediment. The hydrocarbon exposure led to reduced autotrophic activity in the sediment during the season of highest primary production. It also clearly enhanced the activity and biomass of the oil degrading bacteria of the treated waters and sediment, but with little effect on the total bacterial biomass. The effects on the oil degrading bacteria might persist for at least 3 weeks after exposure possibly because of sustained elevated hydrocarbon levels in the sediment.