Lethal and sub-lethal effects of Deepwater Horizon slick oil and dispersant on oyster (Crassostrea virginica) larvae

Type Article
Date 2016-09
Language English
Author(s) Vignier J.1, 2, Soudant P.1, Chu F. L. E.3, Morris J. M.4, Carney M. W.4, Lay C. R.4, Krasnec M. O.4, Robert ReneORCID5, Volety A. K.2
Affiliation(s) 1 : IUEM UBO, Lab Sci Environm Marin UMR LEMAR 6539, Technopole Brest Iroise, F-29280 Plouzane, France.
2 : Florida Gulf Coast Univ, Coll Arts & Sci, Dept Marine & Ecol Sci, Ft Myers, FL 33965 USA.
3 : Virginia Inst Marine Sci, Coll William & Mary, Dept Aquat Hlth Sci, Gloucester Point, VA 23062 USA.
4 : Abt Associates Inc, Boulder, CO 80302 USA.
5 : IFREMER, Unite Littoral, Ctr Bretagne ZI Pointe Diable CS 10070, F-29280 Plouzane, France.
Source Marine Environmental Research (0141-1136) (Elsevier Sci Ltd), 2016-09 , Vol. 120 , P. 20-31
DOI 10.1016/j.marenvres.2016.07.006
WOS© Times Cited 14
Keyword(s) Deepwater Horizon oil spill, Crassostrea virginica, Corexit 9500A (R), Larvae, Growth, Settlement, PAH
Abstract In April 2010, crude oil was spilled from the Deepwater Horizon (DWH) oil platform for 87 days, coincident with the spawning season and recruitment of the oyster, Crassostrea virginica, in the Gulf of Mexico. Impacts of acute exposures to surface-collected DWH oil (HEWAF), dispersed oil (CEWAF) and dispersant alone (Corexit 9500A®) on planktonic larval stages of C. virginica (veliger, umbo and pediveliger) were tested in the laboratory. Exposures to HEWAF, CEWAF and dispersant were toxic to larvae impairing growth, settlement success and ultimately survival. Larval growth and settlement were reduced at concentrations of tPAH50 ranging from 1.7 to 106 μg L−1 for HEWAF and 1.1–35 μg L−1 for CEWAF, concentrations well within the range of water sampled during the DWH oil spill. Sublethal effects induced by oil and dispersant could have significant ecological implications on oyster populations and on the whole estuarine ecosystem.
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