|
|
|
|
|
| Vignier, Julien. |
| The explosion of the Deepwater Horizon (DWH) oil drilling rig on 20th April 2010 resulted in the largest oil-related environmental disaster in U.S history with an unprecedented amount of oil (779,000 t) and gas discharged continuously in the Gulf of Mexico, over a period of 3 months. As a response, 8 million L of chemical dispersants (mainly Corexit 9500A®) were applied on surface to dissipate the slicks, and injected directly at the well head (3 million L) at 1500 m depths. The oil spill coincided with the spawning and recruitment season of the ecologically and commercially important Eastern oyster, Crassostrea virginica. Due to its biological characteristics (sessile, filter-feeding, ubiquity, “free” spawner), oysters have been employed as a model... |
| Tipo: Text |
Palavras-chave: Pétrole Deepwater Horizon; Deepwater Horizon oil; Dispersant. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00498/60939/64333.pdf |
| |
|
|
| Vignier, Julien; Rolton, Anne; Soudant, Philippe; Chu, Fu-lin E.; Robert, Rene; Volety, Aswani K.. |
| The 2010 explosion of the Deepwater Horizon (DWH) oil rig generated the largest marine oil spill in US history with millions of barrels of crude oil released in the Gulf of Mexico (GoM). The eastern oyster, Crassostrea virginica, is an ecologically and economically important species in the northern GoM. Due to its biological characteristics (sessile, filter feeding), juvenile oysters may have been affected. This study investigated the effects of surface-collected DWH oil prepared as high-energy water-accommodated fraction (HEWAF) on the survival of 2-month-old oyster spat, and evaluated the potential impacts of HEWAF on particle clearance rate and spat tissue. Exposure of oysters to a range of oil/HEWAF (0-7-66-147-908-3450 mu g tPAH50 (sum of 50... |
| Tipo: Text |
Palavras-chave: Oyster spat; Deepwater Horizon oil; Sublethal; Tissue; Inflammatory response; Histopathology. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00425/53615/54548.pdf |
| |
|
|
| Vignier, J.; Donaghy, L.; Soudant, P.; Chu, F. L. E.; Morris, J. M.; Carney, M. W.; Lay, C.; Krasnec, M.; Robert, Rene; Volety, A. K.. |
| The explosion of the Deepwater Horizon (DWH) oil platform resulted in large amounts of crude oil and dispersant Corexit 9500A® released into the Gulf of Mexico and coincided with the spawning season of the oyster, Crassostrea virginica. The effects of exposing gametes and embryos of C. virginica to dispersant alone (Corexit), mechanically (HEWAF) and chemically dispersed (CEWAF) DWH oil were evaluated. Fertilization success and the morphological development, growth, and survival of larvae were assessed. Gamete exposure reduced fertilization (HEWAF: EC201 h = 1650 μg tPAH50 L− 1; CEWAF: EC201 h = 19.4 μg tPAH50 L− 1; Corexit: EC201 h = 6.9 mg L− 1). CEWAF and Corexit showed a similar toxicity on early life stages at equivalent nominal concentrations.... |
| Tipo: Text |
Palavras-chave: Deepwater Horizon oil; Oyster; Fertilization; CEWAF; Corexit; PAH. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00277/38853/42693.pdf |
| |
|
|
| Vignier, J.; Rolton, A.; Soudant, Philippe; Chu, F. L. E.; Robert, Rene; Volety, A. K.. |
| The Deepwater Horizon (DWH) disaster released crude oil in the Gulf of Mexico for 87 days, overlapping with the reproductive season and recruitment of the oyster Crassostrea virginica. The pelagic larval life stages of C. virginica are particularly vulnerable to contaminants such as polycyclic aromatic hydrocarbons (PAHs) and oil droplets. Based on their lipophilic properties, PAHs and oil droplets can adsorb onto phytoplankton and filter-feeding C. virginica larvae may be exposed to these contaminants bound to suspended sediment, adsorbed onto algal and other particles, or in solution. This study examined the effects of exposure of C. virginica larvae to algae mixed with DWH oil. In a 14-day laboratory exposure, 5 day-old C. virginica larvae were exposed... |
| Tipo: Text |
Palavras-chave: Deepwater Horizon oil; Droplet; Oyster larvae; Dietary exposure; PAH. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00473/58423/61445.pdf |
| |
|
|
|
