Influence of chronic exposure to silver and mercury in the field on the bioaccumulation potential of the bivalve Macoma balthica
Saved in:
| Title: | Influence of chronic exposure to silver and mercury in the field on the bioaccumulation potential of the bivalve Macoma balthica |
|---|---|
| Authors: | Amiard-Triquet, C., Boisson, F., Fowler, S. W., Hartl, M. G. J. |
| Source: | Marine Environmental Research. May/Jun1998, Vol. 45 Issue 4/5, p325. 0p. |
| Subjects: | Bioaccumulation, Bioindicators, Macoma baltica, Toxic substance exposure |
| Abstract: | In order to assess the adaptation to metals previously observed in the bioindicator organism, Macoma balthica, subjected to chronic contamination by silver and mercury in the French Loire estuary, the bioaccumulation potential of individual organisms originating from the contaminated Loire estuary and a relatively uncontaminated control estuary (Somme) was evaluated using both radiotracers and stable isotopes of Ag (80 mu g Ag litre-1) and Hg (100 mu g Hg litre-1). Clams from the contaminated estuary were more sensitive to Ag (LT50 = 9 d) than those originating from the Somme estuary (LT50 > 15 d), even though the former bioaccumulated Ag to a significantly lower degree. This is attributed to a consequence of the chronic stress induced by Ag while clams were living in their natural environment. Therefore, past history of trace metal contamination should be considered when evaluating the susceptibility of M. balthica to heavy metal exposure. Lower uptake rates obtained for Hg (during the initial uptake phase only) and for Ag in clams from the polluted estuary suggest the presence of an adaptive trait for survival in contaminated areas. However, the lower degree of bioconcentration observed for Ag was not sufficiently low to reduce the sensitivity of the organisms to Ag and allow them to resist the toxic stress. Clams that survived Ag or Hg exposure at LT50 did not protectthemselves against metal toxicity by accumulating a significantly lesser amount of these metals than clams which did not survive metal stress. The results suggest that the bioaccumulation potential of each individual was not a factor which can explain the survival ability ofM. balthica exposed to chronic Ag and Hg contamination in estuaries.In this case, cellular, biochemical and genetic levels of adaptationare presumed to be of greater importance. [ABSTRACT FROM AUTHOR] |
| Copyright of Marine Environmental Research is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
|---|---|
| Header | DbId: egs DbLabel: Engineering Source An: 8338839 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: Influence of chronic exposure to silver and mercury in the field on the bioaccumulation potential of the bivalve Macoma balthica – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Amiard-Triquet%2C+C%2E%22">Amiard-Triquet, C.</searchLink><br /><searchLink fieldCode="AR" term="%22Boisson%2C+F%2E%22">Boisson, F.</searchLink><br /><searchLink fieldCode="AR" term="%22Fowler%2C+S%2E+W%2E%22">Fowler, S. W.</searchLink><br /><searchLink fieldCode="AR" term="%22Hartl%2C+M%2E+G%2E+J%2E%22">Hartl, M. G. J.</searchLink> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Marine+Environmental+Research%22">Marine Environmental Research</searchLink>. May/Jun1998, Vol. 45 Issue 4/5, p325. 0p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Bioaccumulation%22">Bioaccumulation</searchLink><br /><searchLink fieldCode="DE" term="%22Bioindicators%22">Bioindicators</searchLink><br /><searchLink fieldCode="DE" term="%22Macoma+baltica%22">Macoma baltica</searchLink><br /><searchLink fieldCode="DE" term="%22Toxic+substance+exposure%22">Toxic substance exposure</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: In order to assess the adaptation to metals previously observed in the bioindicator organism, Macoma balthica, subjected to chronic contamination by silver and mercury in the French Loire estuary, the bioaccumulation potential of individual organisms originating from the contaminated Loire estuary and a relatively uncontaminated control estuary (Somme) was evaluated using both radiotracers and stable isotopes of Ag (80 mu g Ag litre-1) and Hg (100 mu g Hg litre-1). Clams from the contaminated estuary were more sensitive to Ag (LT50 = 9 d) than those originating from the Somme estuary (LT50 > 15 d), even though the former bioaccumulated Ag to a significantly lower degree. This is attributed to a consequence of the chronic stress induced by Ag while clams were living in their natural environment. Therefore, past history of trace metal contamination should be considered when evaluating the susceptibility of M. balthica to heavy metal exposure. Lower uptake rates obtained for Hg (during the initial uptake phase only) and for Ag in clams from the polluted estuary suggest the presence of an adaptive trait for survival in contaminated areas. However, the lower degree of bioconcentration observed for Ag was not sufficiently low to reduce the sensitivity of the organisms to Ag and allow them to resist the toxic stress. Clams that survived Ag or Hg exposure at LT50 did not protectthemselves against metal toxicity by accumulating a significantly lesser amount of these metals than clams which did not survive metal stress. The results suggest that the bioaccumulation potential of each individual was not a factor which can explain the survival ability ofM. balthica exposed to chronic Ag and Hg contamination in estuaries.In this case, cellular, biochemical and genetic levels of adaptationare presumed to be of greater importance. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Marine Environmental Research is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=8338839 |
| RecordInfo | BibRecord: BibEntity: Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 0 StartPage: 325 Subjects: – SubjectFull: Bioaccumulation Type: general – SubjectFull: Bioindicators Type: general – SubjectFull: Macoma baltica Type: general – SubjectFull: Toxic substance exposure Type: general Titles: – TitleFull: Influence of chronic exposure to silver and mercury in the field on the bioaccumulation potential of the bivalve Macoma balthica Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Amiard-Triquet, C. – PersonEntity: Name: NameFull: Boisson, F. – PersonEntity: Name: NameFull: Fowler, S. W. – PersonEntity: Name: NameFull: Hartl, M. G. J. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May/Jun1998 Type: published Y: 1998 Identifiers: – Type: issn-print Value: 01411136 Numbering: – Type: volume Value: 45 – Type: issue Value: 4/5 Titles: – TitleFull: Marine Environmental Research Type: main |
| ResultId | 1 |
