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| Titel: |
Microbial Response to Oil Disturbance in the Coastal Sediments of the Ligurian Sea (Nw Mediterranean) |
| Auteur: |
Danovaro, Roberto Della Croce, Norberto Fabiano, Mauro |
| Verschenen in: |
Chemistry & ecology |
| Paginering: | Jaargang 12 (1996) nr. 3 pagina's 187-198 |
| Jaar: |
1996-07-01 |
| Inhoud: |
The effects of the oil contamination (10 April 1991) on microbial assemblages of the Ligurian Sea (northwestern Mediterranean) were investigated on samples collected from January 1991 to January 1992. High hydrocarbon concentrations (up to 214.3 μ g-1 DW) occurred during a phytoplankton bloom and had a significant impact on phytoplankton biomass at the sediment-water interface. Chlorophyll-a concentrations showed an abrupt decline (from 2.49 μg 1-1 in pre-pollution conditions on April 8, to 0.75 μg 1-1 just after the oil contamination on April 22). A concomitant increase of phaeopigment concentration was observed (from 0.37 μ1-1 to 2.24 μg1-1). Oil contamination apparently had a limited effect on microphytobenthic communities. Sedimentary chlorophyll-a increased after oil contamination together with a major peak of phaeopigments. By contrast, increased oil concentrations stimulated a significant bacterial response. Benthic bacteria showed a significant increase in density of all the size classes (small, medium and large bacteria) as well as an enhanced bacterial activity. Consistently with meiofaunal response to hydrocarbons and with functional changes in organic matter composition (RNA:DNA ratios), oiled sediments had only a temporary effect on microbial assemblages. Phytoplankton growth started again immediately after oil decontamination whilst benthic bacterial biomass and activity reached the pre-pollution values after few weeks. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 4 van 6 gevonden artikelen
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