The in vitro influence of the burrowing polychaete Nereis diversicolor on the fate of petroleum hydrocarbons in marine sediments

Gilbert, Franck; Rivet, Lucien; Bertrand, Jean-Claude

doi:10.1016/0045-6535(94)90084-1

Cited by 53 publications

(31 citation statements)

References 20 publications

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“…In this way, sedimentadsorbed contaminants remain in contact with the overlying water for longer periods of time than in nonbioturbated sediment (Reynoldson 1987), thus enhancing the diffusive loss of contaminants from the sediment to the water. Also, burrowing enhances the surface sediment area which, together with irrigation, increases the diffusive loss of contaminants from the sediment (Gilbert et al 1994). Furthermore, the aerobic microbial community may be stimulated by irrigation and burrowing activity of tube-dwelling organisms as penetration of oxygen increases, thereby enhancing aerobic zones in sediments (Krantzberg 1985).…”

Section: Introductionmentioning

confidence: 99%

Effects of the polychaetes Nereis diversicolor and Arenicola marina on the fate and distribution of pyrene in sediments

Christensen¹,

Banta²,

Andersen³

2002

Mar. Ecol. Prog. Ser.

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Effects of the polychaetes Nereis diversicolor and Arenicola marina on the distribution, metabolism and removal of [ 14 C-4, 5, 9,10]-pyrene in sediment microcosms were studied over 42 and 53 d, respectively. Unmetabolized pyrene, water-and organic-soluble pyrene metabolites were quantified in sediment, interstitial water and overlying water, and 14 CO 2 production was also assessed. Both N. diversicolor and A. marina enhanced fluxes of sediment-associated pyrene and metabolites into overlying water but to different extents. The major pathway of pyrene removal from sediments with N. diversicolor was release of water-soluble metabolites, probably formed by metabolism in N. diversicolor. In contrast, flushing of unmetabolized pyrene due to bioturbation was the major removal route from sediments with A. marina. Additionally, increased 14 CO 2 production and concentrations of water-soluble metabolites were also observed in overlying water indicating that A. marina also stimulated the metabolism of pyrene. The high production of water-soluble metabolites was probably due to endogenous metabolism in the lugworm itself, whereas the increased 14 CO 2 production indicated a stimulation of microbial metabolism. After 42 d, only 75% of the originally added amount of pyrene remained associated to sediment particles in microcosms inhabited by N. diversicolor, whereas no significant reduction was observed in microcosms with A. marina due to the necessity of using large amounts of sediment in the lugworm experiment. The actual flux of pyrene and metabolites to overlying water was higher in microcosms with A. marina than with N. diversicolor. Both A. marina and N. diversicolor significantly enhanced the removal pyrene from the sediment, but differences in feeding and life strategies resulted in different removal paths and extents.

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Section: Introductionmentioning

confidence: 99%

Effects of the polychaetes Nereis diversicolor and Arenicola marina on the fate and distribution of pyrene in sediments

Christensen¹,

Banta²,

Andersen³

2002

Mar. Ecol. Prog. Ser.

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“…Although it has been demonstrated that bioturbation can have a significant impact on the burial and degradation of sedimentary lipid components (e.g. Gilbert et al, 1994Gilbert et al, , 1996Sun et al, 1999;Ingalls et al, 2000;Grossi et al, 2002Grossi et al, , 2003, the influence of redox oscillation on lipid degradation has been little studied. Using a diffusively ''open'' incubation sedimentary system that mimics varying conditions of oxygenation in bioturbated sediments, Sun et al (1993) showed that redox changes influenced the diagenetic pathways of chloropigments.…”

Section: Introductionmentioning

confidence: 99%

Influence of various redox conditions on the degradation of microalgal triacylglycerols and fatty acids in marine sediments

Caradec

Grossi

Gilbert

et al. 2004

Organic Geochemistry

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. Influence of various redox conditions on the degradation of microalgal triacylglycerols and fatty acids in marine sediments. Organic Geochemistry, Elsevier, 2004, vol. 35, pp. 277-287. <10.1016/j.orggeochem.2003 This is an author-deposited version published in: http://oatao.univ-toulouse.fr/ Eprints ID: 6101 Abstract Sediment cakes, supplemented with microalgal cells (Nannochloropsis salina), were incubated for 35 days under permanently oxic, oscillating (5d:5d changeover oxic/anoxic) and strictly anoxic conditions of oxygenation in diffusively ''open'' sedimentary systems. Total lipids (T Lip ) and triacylglycerols (TG) concentrations were monitored by thin layer chromatography-flame ionisation detection, whereas the concentrations of the main extractable (free+ester-bound) individual fatty acids (C 16:0 , C 16:1 , C 18:1 ) were followed using gas chromatography-mass spectrometry. Under the three conditions of oxygenation, TOC, T Lip and TG showed a sharp decrease in concentration during the early days of incubation and seemed to stabilise thereafter, defining an apparent non degradable fraction (G NR ). The G NR content was systematically higher in the anoxic incubation than under the oxic and oscillating conditions. The ratio of the main hydrolysis products of TG versus TG [(Free fatty acids+Monoacylglycerols+1,2-Diacylglycerols)/TG], used as an indicator of the hydrolysis of TG, showed that the presence of oxygen in the sediments (oxic and oscillating conditions) stimulates the hydrolysis of TG and the subsequent degradation of their metabolites. Unlike TOC, T Lip and TG, individual fatty acids (FA) showed a continuous concentration decrease until the end of the experiment, which was fitted with a simple first order model [G (t) ) incubations, and no significant difference between individual FA could be observed. The production of saturated and monounsaturated C 16 (and to a lesser extent C 18 ) alkanols under oscillating and anoxic redox conditions suggested that (a part of) the dominant FA were reduced to the corresponding alcohols under anoxic conditions, following their release from acylglycerols.

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“…However, this polychaete causes substantial changes in oxygenation and redox potential of surficial and burrow-lining sediments that may have a significant effect on the bacterial assemblages (Esselink & Zwarts 1989, Gilbert et al 1994. For instance, denitrification rates increased in surface sediments with H. diversicolor colonies and activity of chemolithotrophic bacteria was stimulated in burrows (Gilbert et al 1994). Lucas & Bertru (1997) demonstrated that > 80% of ingested sediment bacteria disappeared in the H. diversicolor midgut (MG) via bacteriolysis.…”

Section: Introductionmentioning

confidence: 99%

Characterization of free-living and attached bacteria in sediments colonized by Hediste diversicolor

Lucas¹,

Bertru²,

Höfle³

2003

Aquat. Microb. Ecol.

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The dynamics of free-living and attached bacteria populations were studied in salt marsh sediments that were extensively colonized by the polychaete Hediste (Nereis) diversicolor (O. F. Müller). Bioturbation by H. diversicolor affected the density and community structure of free-living (FLB) and attached (AB) bacteria assemblages. Passage through the polychaete gut resulted in an 81 to 88% decrease of both bacterial groups and shift in favor of FLB in the hindgut (HG). In surficial sediments outside and inside the worm bed, attached bacteria represented 77 to 99% of the total bacterial densities. Although FLB were minor in terms of biomass, their densities strongly increased in January and May and peaked from 9.6 to 16.2 × 10 8 cells g -1 . AB peaked in August and October with densities from 205.8 to 283.6 × 10 8 cells g -1. AB densities were significantly higher in burrow wall sediment than in surrounding sediment. The density of FLB and AB was reduced in surficial sediment inside the worm bed compared to sediments not colonized by H. diversicolor. Community fingerprints of environmental 5S rRNA showed that there was no significant difference between the structure of the 2 bacterial assemblages. However, in August 1995, the 2 assemblages were highly divergent in the sediment outside the worm bed. The structure of FLB and AB from inside the worm bed was significantly different from the structure of bacterial assemblages outside the sediments colonized by H. diversicolor.

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The in vitro influence of the burrowing polychaete Nereis diversicolor on the fate of petroleum hydrocarbons in marine sediments

Cited by 53 publications

References 20 publications

Effects of the polychaetes Nereis diversicolor and Arenicola marina on the fate and distribution of pyrene in sediments

Effects of the polychaetes Nereis diversicolor and Arenicola marina on the fate and distribution of pyrene in sediments

Influence of various redox conditions on the degradation of microalgal triacylglycerols and fatty acids in marine sediments

Characterization of free-living and attached bacteria in sediments colonized by Hediste diversicolor

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