Geochemical patterns in sediments near offshore production platforms

Kennicutt, Mahlon C.; Boothe, Paul N.; Wade, Terry L.; Sweet, Stephen T.; Rezak, Richard; Kelly, F. J.; Brooks, James M.; Presley, B.J.; Wiesenburg, Denis A.

doi:10.1139/f96-214

Cited by 40 publications

(26 citation statements)

References 2 publications

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“…These conclusions regarding the distribution and concentrations of naturally occurring metals in offshore northern Gulf of Mexico sediments have been confirmed by many other studies (Table 4.3) (Tieh and Pyle 1972;Tieh et al 1973;Trefry and Presley 1976a, b;Presley et al 1980;Trefry et al 1985;Kennicutt et al 1996). Presley et al (1980) reports that sediments from a 1,500 square kilometer (km 2 ) (579 square mile [mi 2 ]) area of the Mississippi River Delta had Pb and Cd concentrations 10-100 % higher than background levels.…”

Section: Other Contaminants Attributable To Humanssupporting

confidence: 83%

“…PAH concentrations were highest near the platforms and decreased rapidly with distance from the platform (Figures 4.26 and 4.27) (Kennicutt et al 1996). Spatial patterns of PAHs and metals exhibited strong directional orientations reflective of the local current regime.…”

Section: Other Contaminants Attributable To Humansmentioning

confidence: 94%

“…Fish and Wildlife Service (USFWS), and coastal states. Trefry and Presley (1976a), Presley et al (1980), Trefry et al (1985), Kennicutt et al (1996); Continental Shelf Associates (2006) c Trefry and Presley (1976b) d Horowitz et al (2001) One aspect of these national assessments is a region-by-region consideration of sediment quality, sediment contamination, benthic quality, fish tissue contamination, and other measures of environmental quality. The northern Gulf of Mexico is one of the regions assessed.…”

Section: Coastal Sedimentsmentioning

confidence: 99%

“…Spatial patterns of PAHs and metals exhibited strong directional orientations reflective of the local current regime. With a Kennicutt et al 1996).…”

Section: Other Contaminants Attributable To Humansmentioning

confidence: 99%

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Sediment Contaminants of the Gulf of Mexico

Kennicutt

2017

Habitats and Biota of the Gulf of Mexico: Before the Deepwater Horizon Oil Spill

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Section: Other Contaminants Attributable To Humanssupporting

confidence: 83%

Section: Other Contaminants Attributable To Humansmentioning

confidence: 94%

Section: Coastal Sedimentsmentioning

confidence: 99%

“…Spatial patterns of PAHs and metals exhibited strong directional orientations reflective of the local current regime. With a Kennicutt et al 1996).…”

Section: Other Contaminants Attributable To Humansmentioning

confidence: 99%

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Sediment Contaminants of the Gulf of Mexico

Kennicutt

2017

Habitats and Biota of the Gulf of Mexico: Before the Deepwater Horizon Oil Spill

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“…In a review of studies of mixtures of heavy metals, Norwood et al [8] conclude that synergisms and antagonisms are more common than response-additive toxicity. Metals and PAH are frequent cocontaminants in sediments [9][10][11] and * To whom correspondence may be addressed (zoflee@lsu.edu).…”

Section: Introductionmentioning

confidence: 99%

Mixtures of metals and polynuclear aromatic hydrocarbons elicit complex, nonadditive toxicological interactions in meiobenthic copepods

Fleeger

Gust

Marlborough

et al. 2007

Enviro Toxic and Chemistry

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Abstract-The acute toxicity of metal-polynuclear aromatic hydrocarbon (PAH) mixtures (i.e., Cd, Hg, Pb, fluoranthene, and phenanthrene) associated with sediments was assessed in two benthic copepods. Schizopera knabeni was exposed to sediment amended with single contaminants and mixtures. Adult S. knabeni were highly tolerant of single-contaminant exposures to phenanthrene, Cd, Hg, and Pb as well as a mixture of Cd, Hg, and Pb. Binary experiments revealed that although phenanthrene was synergistic with Cd and Hg, the phenanthrene-Cd synergism was much stronger (2.8 times more lethal than predicted). When a mixture of Cd, Hg, and Pb was combined with phenanthrene, a synergistic response was observed, eliciting 1.5 times greater lethality than predicted. A Cd-phenanthrene synergism in S. knabeni was also observed in aqueous exposures, suggesting that the interaction was related to a pharmacological insult rather than a sediment-related exposure effect. An antagonism between Cd, Hg, and Pb was indicated, and this antagonism may have moderated the Cd-phenanthrene synergism in mixtures containing Cd, Hg, Pb, and phenanthrene. Experiments with Amphiascoides atopus revealed that phenanthrene and fluoranthene were each synergistic with Cd in aqueous exposures. Our studies suggest that interactive toxicity among metal-PAH mixtures may be common among benthic copepods and that strong synergistic effects observed in binary mixtures may be moderated in more diverse contaminant mixtures. However, the strength of the observed synergisms raises concerns that established sediment quality criteria may not be protective for organisms jointly exposed to PAH and metals, especially Cd-PAH mixtures.

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Effects of Gas-Producing Platforms on Continental Shelf Megafauna in the Northwest Gulf of Mexico: Reproductive Status and Health

Wilson-Ormond

Ellis

Powell

et al. 2000

Internat. Rev. Hydrobiol.

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One component of the Gulf of Mexico Offshore Operations Monitoring Experiment (GOOMEX) was to assess the reproductive effort and health (defined as the prevalence and intensity of parasites or pathologies) of mobile macroepifauna collected near‐to and far‐from gas‐producing platforms. The stage of reproductive development as determined by visual inspection or histological analysis was rarely significantly different between near‐field and far‐field sites. Tissues were examined histologically to determine the prevalence and intensity of parasitism and disease. If a difference in parasitism or pathology existed, individuals collected far‐from the platforms typically had higher prevalences while individuals living near‐to the platforms usually had higher intensities. Parasitism and disease had little effect on stage of reproductive development except at MU‐A85 where individuals with increased disease and parasitism also had decreased reproductive development. Variations in infection intensity were not due to differences in age structure of populations. Larger, older individuals were not consistently more heavily parasitized. Trend in reproductive stage and population health did not follow trends in environmental contamination; the fewest significant differences were observed at the most contaminated platforms. Patterns of differences in parasitism, disease and reproductive effort between the near and far‐field stations were platform specific, indicating that the physical and chemical characteristics unique to each platform probably control reproductive effort and levels of disease and parasitism in populations living there. The influence of structure, a variable common to all platforms, did not exert an overriding influence. Mobile taxa such as shrimp exhibited near‐field/far‐field differences as frequently as the less mobile species such as starfish. Thus, mobile epifauna maintain discrete populations over long‐enough time periods to develop different population histories. Shallow‐water sites were more likely to exhibit platform‐specific near‐field/far‐field differences in population structure suggesting that trends in water depth and the intensity of seasonality may explain the apparent uniqueness of each platform's effect on population structure and health.

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Geochemical patterns in sediments near offshore production platforms

Cited by 40 publications

References 2 publications

Sediment Contaminants of the Gulf of Mexico

Sediment Contaminants of the Gulf of Mexico

Mixtures of metals and polynuclear aromatic hydrocarbons elicit complex, nonadditive toxicological interactions in meiobenthic copepods

Effects of Gas-Producing Platforms on Continental Shelf Megafauna in the Northwest Gulf of Mexico: Reproductive Status and Health

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