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Bayesian spatial modeling of Lavaca Bay pollutants |
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| Authors: | Bissett Wesley Garry Adams L Field Robert Moyer William Phillips Tim Morgan Scott H Wade Terry Sweet Steve Thompson James A |
| Institution: | a Texas A&M University, College of Veterinary Medicine, Department of Large Animal Clinical Sciences, 4475 TAMU, College Station, TX 77843-4475, USA b Texas A&M University, College of Veterinary Medicine, Department of Veterinary Pathobiology, 4467 TAMU, College Station, TX 77843-4467, USA c Texas A&M University, College of Veterinary Medicine, Department of Veterinary Integrative Biosciences, 4458 TAMU, College Station, TX 77843-4458, USA d Texas A&M University, College of Geosciences, Geochemical and Environmental Research Group, 3149 TAMU, College Station, TX 77843-3149, USA |
| Abstract: | Locational risk of increased mercury and PAH concentrations in Lavaca Bay, Texas sediments and eastern oysters (Crassostrea virginica) harvested from Lavaca Bay, Texas were analysed. Chemical analysis results were evaluated utilizing Bayesian geo-statistical methods for comparison of the model fit of a random effects model versus a convoluted model which included both random and spatial effects. For those results fit best with the convoluted model, continuous surface maps of predicted parameter values were created. Sediment and oyster concentrations of mercury and the majority of measured PAHs were fit best with the convoluted model. The locational risks of encountering elevated concentrations of these pollutants in Lavaca Bay sediments and oysters were highest in close proximity to industrial facilities. |
| Keywords: | Mercury Polycyclic aromatic hydrocarbons Bayesian geo-statistical analysis Superfund Locational risks Lavaca Bay Texas |
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