Diagenetic Processes in Aquaculture Ponds Showing Metal Accumulation on Shrimp Gills
The gill is the organ by which many toxic metals are taken up by crustaceans. Iron is known to precipitate at its surface, a phenomenon recently observed in some tropical aquaculture ponds. The present study uses a field approach to understand better the environmental conditions and ecological proce...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2021-02-01
|
| Series: | Frontiers in Marine Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2021.625789/full |
| _version_ | 1831741836175081472 |
|---|---|
| author | Hugues Lemonnier Florence Royer Florian Caradec Etienne Lopez Clarisse Hubert Clarisse Hubert Émilie Rabiller Térence Desclaux Jean-Michel Fernandez Françoise Andrieux-Loyer |
| author_facet | Hugues Lemonnier Florence Royer Florian Caradec Etienne Lopez Clarisse Hubert Clarisse Hubert Émilie Rabiller Térence Desclaux Jean-Michel Fernandez Françoise Andrieux-Loyer |
| author_sort | Hugues Lemonnier |
| collection | DOAJ |
| description | The gill is the organ by which many toxic metals are taken up by crustaceans. Iron is known to precipitate at its surface, a phenomenon recently observed in some tropical aquaculture ponds. The present study uses a field approach to understand better the environmental conditions and ecological processes involved in this deposit. Because shrimp are exposed to reduced products originating from organic waste accumulated in the sediment, spatial variation in pH, redox potential and concentrations of dissolved metals in pore water were investigated in these ponds. Total organic carbon, acid volatile sulfide and pyrite were also analyzed in the solid phase. Fe2+ in pore waters showed high spatial variability between ponds and within the same pond with concentrations up to 1,193 μmol l–1. Behaviors of Fe2+, Mn2+ and Co2+ in pore water were similar. Four geochemical environments were identified, based on their physico-chemical characteristics. Highest concentrations for Fe2+, Mn2+ and Co2+ in sediment pore water occurred in slightly acidic and suboxic conditions. When the sediment became anoxic, the H2S produced reacted with Fe2+ and/or Co2+ to form acid volatile sulfide and pyrite. When pH increased, the concentration of free H2S rose up to 736 μmol l–1. With neutral and suboxic conditions, dissolved metal concentrations could be controlled by their precipitation as oxides and hydroxides. The production of pyrite suggested the existence of a possible process of sediment acidification between two crop periods through the production of sulfuric acid. This acidification could increase with pond age and be the cause of the accumulation of reduced metal after 30 years of aquaculture activity. |
| first_indexed | 2024-12-21T14:23:42Z |
| format | Article |
| id | doaj.art-0ecabb6ebb4842f4a827e70a725174c6 |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-12-21T14:23:42Z |
| publishDate | 2021-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-0ecabb6ebb4842f4a827e70a725174c62022-12-21T19:00:41ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452021-02-01810.3389/fmars.2021.625789625789Diagenetic Processes in Aquaculture Ponds Showing Metal Accumulation on Shrimp GillsHugues Lemonnier0Florence Royer1Florian Caradec2Etienne Lopez3Clarisse Hubert4Clarisse Hubert5Émilie Rabiller6Térence Desclaux7Jean-Michel Fernandez8Françoise Andrieux-Loyer9Ifremer, IRD, Univ Nouvelle-Calédonie, Univ La Réunion, UMR 92200 ENTROPIE, Nouméa, FranceIfremer, IRD, Univ Nouvelle-Calédonie, Univ La Réunion, UMR 92200 ENTROPIE, Nouméa, FranceIfremer – DYNECO PELAGOS, ZI Pointe du Diable, Plouzané, FranceIfremer, IRD, Univ Nouvelle-Calédonie, Univ La Réunion, UMR 92200 ENTROPIE, Nouméa, FranceIfremer, IRD, Univ Nouvelle-Calédonie, Univ La Réunion, UMR 92200 ENTROPIE, Nouméa, FranceIfremer – Station de Sète, Sète Cedex, FranceIfremer – DYNECO PELAGOS, ZI Pointe du Diable, Plouzané, FranceIfremer, IRD, Univ Nouvelle-Calédonie, Univ La Réunion, UMR 92200 ENTROPIE, Nouméa, FranceAEL – Pépinière d’Entreprises IRD Promenade Laroque, Nouméa, FranceIfremer – DYNECO PELAGOS, ZI Pointe du Diable, Plouzané, FranceThe gill is the organ by which many toxic metals are taken up by crustaceans. Iron is known to precipitate at its surface, a phenomenon recently observed in some tropical aquaculture ponds. The present study uses a field approach to understand better the environmental conditions and ecological processes involved in this deposit. Because shrimp are exposed to reduced products originating from organic waste accumulated in the sediment, spatial variation in pH, redox potential and concentrations of dissolved metals in pore water were investigated in these ponds. Total organic carbon, acid volatile sulfide and pyrite were also analyzed in the solid phase. Fe2+ in pore waters showed high spatial variability between ponds and within the same pond with concentrations up to 1,193 μmol l–1. Behaviors of Fe2+, Mn2+ and Co2+ in pore water were similar. Four geochemical environments were identified, based on their physico-chemical characteristics. Highest concentrations for Fe2+, Mn2+ and Co2+ in sediment pore water occurred in slightly acidic and suboxic conditions. When the sediment became anoxic, the H2S produced reacted with Fe2+ and/or Co2+ to form acid volatile sulfide and pyrite. When pH increased, the concentration of free H2S rose up to 736 μmol l–1. With neutral and suboxic conditions, dissolved metal concentrations could be controlled by their precipitation as oxides and hydroxides. The production of pyrite suggested the existence of a possible process of sediment acidification between two crop periods through the production of sulfuric acid. This acidification could increase with pond age and be the cause of the accumulation of reduced metal after 30 years of aquaculture activity.https://www.frontiersin.org/articles/10.3389/fmars.2021.625789/fullShrimp aquaculture sustainabilityiron depositsgillssediment acidificationredox dynamicdynamic of metals |
| spellingShingle | Hugues Lemonnier Florence Royer Florian Caradec Etienne Lopez Clarisse Hubert Clarisse Hubert Émilie Rabiller Térence Desclaux Jean-Michel Fernandez Françoise Andrieux-Loyer Diagenetic Processes in Aquaculture Ponds Showing Metal Accumulation on Shrimp Gills Frontiers in Marine Science Shrimp aquaculture sustainability iron deposits gills sediment acidification redox dynamic dynamic of metals |
| title | Diagenetic Processes in Aquaculture Ponds Showing Metal Accumulation on Shrimp Gills |
| title_full | Diagenetic Processes in Aquaculture Ponds Showing Metal Accumulation on Shrimp Gills |
| title_fullStr | Diagenetic Processes in Aquaculture Ponds Showing Metal Accumulation on Shrimp Gills |
| title_full_unstemmed | Diagenetic Processes in Aquaculture Ponds Showing Metal Accumulation on Shrimp Gills |
| title_short | Diagenetic Processes in Aquaculture Ponds Showing Metal Accumulation on Shrimp Gills |
| title_sort | diagenetic processes in aquaculture ponds showing metal accumulation on shrimp gills |
| topic | Shrimp aquaculture sustainability iron deposits gills sediment acidification redox dynamic dynamic of metals |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2021.625789/full |
| work_keys_str_mv | AT hugueslemonnier diageneticprocessesinaquaculturepondsshowingmetalaccumulationonshrimpgills AT florenceroyer diageneticprocessesinaquaculturepondsshowingmetalaccumulationonshrimpgills AT floriancaradec diageneticprocessesinaquaculturepondsshowingmetalaccumulationonshrimpgills AT etiennelopez diageneticprocessesinaquaculturepondsshowingmetalaccumulationonshrimpgills AT clarissehubert diageneticprocessesinaquaculturepondsshowingmetalaccumulationonshrimpgills AT clarissehubert diageneticprocessesinaquaculturepondsshowingmetalaccumulationonshrimpgills AT emilierabiller diageneticprocessesinaquaculturepondsshowingmetalaccumulationonshrimpgills AT terencedesclaux diageneticprocessesinaquaculturepondsshowingmetalaccumulationonshrimpgills AT jeanmichelfernandez diageneticprocessesinaquaculturepondsshowingmetalaccumulationonshrimpgills AT francoiseandrieuxloyer diageneticprocessesinaquaculturepondsshowingmetalaccumulationonshrimpgills |