Deepwater Horizon oil spill impacts on sea turtles could span the Atlantic

Type Article
Date 2015-12
Language English
Author(s) Putman Nathan F.ORCID1, Abreu-Grobois F. Alberto2, Iturbe-Darkistade Inaky2, Putman Emily M., Richards Paul M.3, Verley Philippe4
Affiliation(s) 1 : Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Cooperat Inst Marine & Atmospher Studies, Miami, FL 33149 USA.
2 : Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Unidad Acad Mazatlan, Mazatlan 82040, Sinaloa, Mexico.
3 : Southeast Fisheries Sci Ctr, Natl Marine Fisheries Serv, Miami, FL 33149 USA.
4 : Ctr Rech Halieut Mediterraneenne & Tropicale, MARBEC, UMR 248, IRD, F-34203 Sete, France.
Source Biology Letters (1744-9561) (Royal Soc), 2015-12 , Vol. 11 , N. 12 , P. 20150596 (4p.)
DOI 10.1098/rsbl.2015.0596
WOS© Times Cited 34
Keyword(s) ocean-circulation model, sea turtle, oil spill, movement ecology, distribution
Abstract We investigated the extent that the 2010 Deepwater Horizon oil spill potentially affected oceanic-stage sea turtles from populations across the Atlantic. Within an ocean-circulation model, particles were backtracked from the Gulf of Mexico spill site to determine the probability of young turtles arriving in this area from major nesting beaches. The abundance of turtles in the vicinity of the oil spill was derived by forward-tracking particles from focal beaches and integrating population size, oceanic-stage duration and stage-specific survival rates. Simulations indicated that 321 401 (66 199-397 864) green (Chelonia mydas), loggerhead (Caretta caretta) and Kemp's ridley (Lepidochelys kempii) turtles were likely within the spill site. These predictions compared favourably with estimates from in-water observations recently made available to the public (though our initial predictions for Kemp's ridley were substantially lower than in-water estimates, better agreement was obtained with modifications to mimic behaviour of young Kemp's ridley turtles in the northern Gulf). Simulations predicted 75.2% (71.9-76.3%) of turtles came from Mexico, 14.8% (11-18%) from Costa Rica, 5.9% (4.8-7.9%) from countries in northern South America, 3.4% (2.4-3.5%) from the United States and 1.6% (0.6-2.0%) from West African countries. Thus, the spill's impacts may extend far beyond the current focus on the northern Gulf of Mexico.
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