Bayesian estimation of kinetic rate constants in a food-web model of polycyclic aromatic hydrocarbon bioaccumulation

Karen Watanabe-Sailor, Hsin I. Lin, Henry L. Bart, Peter Martinat, Jay C. Means, Myra L. Kunas, Deborah A. Grimm

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Water, sediments, fish and other biota were sampled from fixed stations along bayous in the LaBranche Wetlands of Louisiana as part of an environmental contamination study in 1996 and 1997. In order to understand the biological fate of some of these contaminants, a spotted gar (Lepisosteus oculatus) food-web model was developed from site-specific data and established bioaccumulation modeling assumptions. Based on gut contents analysis, the gar were found to feed on terrestrial arthropods, a variety of small fish, aquatic insects, crayfish and grass shrimp. A Bayesian approach (a hierarchical model and Markov Chain Monte Carlo simulation) was used to estimate the kinetic rate constants of uptake from water, dietary uptake and total elimination for the food-web model using site-specific measurements of naphthalene, phenanthrene, and benzanthracene concentrations, reference literature inputs, and a hierarchical statistical model. This iterative simulation method resulted in a distribution of the parameters for each chemical comprised of the last 3000 values from four separate Markov Chains of length 15,000-25,000 iterations. The posterior parameter values were found to be consistent with rate constants published in the literature for various fish species, and were used to determine distributions of predicted gar PAH concentrations.

Original languageEnglish (US)
Pages (from-to)229-246
Number of pages18
JournalEcological Modelling
Volume181
Issue number2-3
DOIs
StatePublished - Jan 20 2005

Fingerprint

bioaccumulation
polycyclic aromatic hydrocarbons
food webs
food web
Lepisosteus oculatus
PAH
Lepisosteidae
kinetics
Markov chain
fish
Palaemonetes
uptake mechanisms
phenanthrene
naphthalene
aquatic insects
crayfish
statistical models
arthropod
simulation
arthropods

Keywords

  • Bioaccumulation
  • Biomagnification
  • Hierarchical model
  • Organics
  • PAHs

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecological Modeling
  • Ecology

Cite this

Watanabe-Sailor, K., Lin, H. I., Bart, H. L., Martinat, P., Means, J. C., Kunas, M. L., & Grimm, D. A. (2005). Bayesian estimation of kinetic rate constants in a food-web model of polycyclic aromatic hydrocarbon bioaccumulation. Ecological Modelling, 181(2-3), 229-246. https://doi.org/10.1016/j.ecolmodel.2004.06.040

Bayesian estimation of kinetic rate constants in a food-web model of polycyclic aromatic hydrocarbon bioaccumulation. / Watanabe-Sailor, Karen; Lin, Hsin I.; Bart, Henry L.; Martinat, Peter; Means, Jay C.; Kunas, Myra L.; Grimm, Deborah A.

In: Ecological Modelling, Vol. 181, No. 2-3, 20.01.2005, p. 229-246.

Research output: Contribution to journalArticle

Watanabe-Sailor, K, Lin, HI, Bart, HL, Martinat, P, Means, JC, Kunas, ML & Grimm, DA 2005, 'Bayesian estimation of kinetic rate constants in a food-web model of polycyclic aromatic hydrocarbon bioaccumulation', Ecological Modelling, vol. 181, no. 2-3, pp. 229-246. https://doi.org/10.1016/j.ecolmodel.2004.06.040
Watanabe-Sailor, Karen ; Lin, Hsin I. ; Bart, Henry L. ; Martinat, Peter ; Means, Jay C. ; Kunas, Myra L. ; Grimm, Deborah A. / Bayesian estimation of kinetic rate constants in a food-web model of polycyclic aromatic hydrocarbon bioaccumulation. In: Ecological Modelling. 2005 ; Vol. 181, No. 2-3. pp. 229-246.
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