Mineralization potentials of aromatic hydrocarbons by estuarine microorganisms: variations with season, location, and bacterioplankton production

Hudak, JP; McDaniel, Julie Ann; Lee, S.; Fuhrman, Jed A.

doi:10.3354/meps047097

Cited by 7 publications

(2 citation statements)

References 13 publications

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“…This study used naphthalene additions to the standard assay for bacterial production to quantify the sensitivity of natural bacteria assemblages to SVOC exposure. Naphthalene additions are known to inhibit bacteria production (Hudak et al 1988 ), thus organotolerant strains may contribute disproportionately to measured heterotrophic production in the presence of elevated naphthalene concentrations. The assay was performed on surface sediments at 12 stations throughout the Charleston Harbor estuarine over the course of three sampling events in 1998 and 1999.…”

Section: Discussionmentioning

confidence: 99%

PAH mineralization and bacterial organotolerance in surface sediments of the Charleston Harbor estuary

et al. 2009

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Semi-volatile organic compounds (SVOCs) in estuarine waters can adversely affect biota but watershed sources can be difficult to identify because these compounds are transient. Natural bacterial assemblages may respond to chronic, episodic exposure to SVOCs through selection of more organotolerant bacterial communities. We measured bacterial production, organotolerance and polycyclic aromatic hydrocarbon (PAH) mineralization in Charleston Harbor and compared surface sediment from stations near a known, permitted SVOC outfall (pulp mill effluent) to that from more pristine stations. Naphthalene additions inhibited an average of 77% of bacterial metabolism in sediments from the more pristine site (Wando River). Production in sediments nearest the outfall was only inhibited an average of 9% and in some cases, was actually stimulated. In general, the stations with the highest rates of bacterial production also were among those with the highest rates of PAH mineralization. This suggests that the capacity to mineralize PAH carbon is a common feature amongst the bacterial assemblage in these estuarine sediments and could account for an average of 5.6% of bacterial carbon demand (in terms of production) in the summer, 3.3% in the spring (April) and only 1.2% in winter (December).

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Section: Discussionmentioning

confidence: 99%

PAH mineralization and bacterial organotolerance in surface sediments of the Charleston Harbor estuary

et al. 2009

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“…Studies on PAHs in surface waters have been carried out by scholars, and research in this field started in the 1980s [18]. Early investigations were mainly focused on the pollution status of PAHs.…”

Section: Introductionmentioning

confidence: 99%

Pollution Characteristics and Risk Evaluation of PAHs in Subsidence Water Bodies in Huainan Coal Mining Area, China

Deng,

Chen,

Wang

et al. 2023

Sustainability

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As a class of persistent organic pollutants (POPs), polycyclic aromatic hydrocarbons (PAHs) have mutagenic, teratogenic, and carcinogenic effects, so they can pose a greater threat to the natural environment and human health. Most of the PAHs in coal mining areas originate from the mining and utilization process of coal resources, which has a variety of carriers in the environment: atmosphere, water bodies, soil, sediments, etc. To study their pollution status in the subsidence waters of the Huainan coal mining area, sixteen priority control PAHs of sixteen surface water samples from seven subsidence water bodies were tested using gas chromatography–mass spectrometry (GC–MS), and their pollution characteristics were analyzed. Overall, the concentration of PAHs ranged from 212 to 283 ng·L−1, and benzo[b]fluoranthene (BbF) had the highest average concentration. In addition, the concentration of PAHs above four rings was relatively high. After statistical analysis, the Pearson correlation coefficient calculation showed a highly significant positive correlation between PAHs with the same number of rings. Three principal factors were selected using factor analysis, which could explain 88.37% of the total variance, to conduct the source identification. Coal combustion was found to be the main source of PAH pollution in the area. Then, ecological risk using the risk quotient (RQ) method was carried out. The results showed that PAH contamination was medium risk, among which, benzo[a]anthracene (BaA) and BbF had a high ecological risk. In addition, the results of biological toxicity evaluation using the species sensitivity distribution model (SSD) showed that benzo[a]pyrene (BaP) had a high proportion of potential effects on aquatic organisms. By using the response addition model, the evaluation results showed that the ecological risk of the subsidence water bodies in the Panyi mine was the highest. Finally, human health risks were evaluated from two pathways: dermal contact and ingestion. The carcinogenic health risks from the dermal contact exceeded the permissible limits, while the hazard entropy of non-carcinogenic risks from the above two pathways were less than 1.

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The effect of temperature and algal biomass on bacterial production and specific growth rate in freshwater and marine habitats

et al. 1991

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We analyzed heterotrophic, pelagic bacterial production and specific growth rate data from 57 studies conducted in fresh, marine and estuarine/coastal waters. Strong positive relationships were identified between 1) bacterial production and bacterial abundance and 2) bacterial production and algal biomass. The relationship between bacterial production and bacterial abundance was improved by also considering water temperature. The analysis of covariance model revealed consistent differences between fresh, marine and estuarine/coastal waters, with production consistently high in estuarine/coastal environments. The log-linear regression coefficient of abundance was not significantly different from 1.00, and this linear relationship permitted the use of specific growth rate (SGR in day(-1)) as a dependent variable. A strong relationship was identified between specific growth rate and temperature. This relationship differed slightly across the three habitats. A substantial portion of the residual variation from this relationship was accounted for by algal biomass, including the difference between marine and estuarine/coastal habitats. A small but significant difference between the fresh- and saltwater habitats remained. No significant difference between the chlorophyll effect in different habitats was identified. The model of SGR against temperature and chlorophyll was much weaker for freshwater than for marine environments. For a small subset of the data set, mean cell volume accounted for some of the residual variation in SGR. Pronounced seasonality, fluctuations in nutrient quality, and variation of the grazing environment may contribute to the unexplained variation in specific growth.

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Mineralization potentials of aromatic hydrocarbons by estuarine microorganisms: variations with season, location, and bacterioplankton production

Cited by 7 publications

References 13 publications

PAH mineralization and bacterial organotolerance in surface sediments of the Charleston Harbor estuary

PAH mineralization and bacterial organotolerance in surface sediments of the Charleston Harbor estuary

Pollution Characteristics and Risk Evaluation of PAHs in Subsidence Water Bodies in Huainan Coal Mining Area, China

The effect of temperature and algal biomass on bacterial production and specific growth rate in freshwater and marine habitats

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