Tracing Sewage in the Marine Environment: altered signatures in Concepción Bay, Chile

Seguel, Carmen Gloria; Mudge, Stephen M.; Salgado, C.; Toledo, M. L. Pita

doi:10.1016/s0043-1354(01)00146-4

Cited by 45 publications

(21 citation statements)

References 25 publications

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“…Our results are consistent with the argument that it is more appropriate to use simultaneously different biomarkers to assess the origin of sediment organic matter (Huang & Meinschein, 1979;Volkman, 1986;Canuel et al, 1995;Mudge & Norris, 1997;Seguel et al, 2001;Zimmerman & Canuel, 2001;Curiale & Harrison, 2007;Ali et al, 2009).…”

Section: Sources Of Phytosterolssupporting

confidence: 91%

“…In this study, seven different approaches were used: (1) Percentages of different sterols in each sediment sample, according to the number of carbons (C 27 , C 28 and C 29 ), differentiating marine from terrestrial sources (Huang & Meinschein, 1979). (2) Three sterol source indices (SSI) were calculated to evaluate terrestrial organic matter input into the aquatic environment, using the ratio of stigmasterol/cholesterol, β-sitosterol/cholesterol and campesterol/cholesterol, with cholesterol as the assumed marine sterol (Mudge & Norris, 1997;Seguel et al, 2001;Fabbri et al, 2005;Ali et al, 2009).…”

Section: Sterol Sourcementioning

confidence: 99%

“…(5) Use of other components present in the lipid fraction as indirect evidence of terrestrial influence such as long chain fatty acids (>C 22 ) that are utilized as indicators of land input (Volkman, 1986;Canuel et al, 1995;Zimmerman & Canuel, 2001). (6) The presence of long chain alkanes (>C 22 ) and long chain fatty alcohols, considered terrestrial markers (Brassell et al, 1980;Seguel et al, 2001). (7) Dehydroabietic acid (DHAA) was measured in all sediment samples as an indicator of the influence of pulp mill effluents (Volkman & Holdsworth, 1993;Johnsen et al, 1995).…”

Section: Sterol Sourcementioning

confidence: 99%

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Distribution and sources of phytosterols in coastal and river sediments of south central Chile

Saavedra

Quiñones

Becerra

2014

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ABSTRACT. Phytosterols are potential endocrine-disrupting compounds. Quantification of phytosterols was carried out in sediments from four coastal zones and two rivers in south-central Chile. Sterol concentrations were determined by capillary gas chromatography-mass spectrometry and the sources of sedimentary organic matter were determined using sterol ratios and lipid biomarkers. Total sterol concentrations (0.03 to 10.4 µg g -1 ) were within the range reported for other marine ecosystems and the β-sitosterol concentration (0.01 to 2.01 µg g -1 ) was lower than previously reported for the upwelling system off Peru. Some coastal stations adjacent to the rivers had β-sitosterol of terrestrial origin. High concentrations of β-sitosterol were also found in sediments from more oceanic stations, supporting the notion that this sterol can also be produced by phytoplankton. No differences in the sterol concentration between the coastal zones were found. However, significant differences were found between almost all coastal zones and both rivers, and between rivers. At the station level and using different biomarkers of the source of organic matter, some areas were found to have a clear terrestrial influence; whereby it is assumed that the source of the phytosterols (especially β-sitosterol) would be vascular plants. The BioBío River and its mouth have a wide variety of sterols and lipids and high levels of cholesterol and epicholestanol, which is possibly related to the presence of domestic effluents derived from large cities. No clear spatial pattern emerge between the location of pulp mill industries and β-sitosterol sediment concentration, with the exception of one station located in the Gulf of Arauco. Keywords: phytosterols, biomarkers, endocrine disruption, pulp mill, Chile. Distribución y fuentes de fitoesteroles en sedimentos costeros y de ríos del centro-sur de Chile RESUMEN. Los fitoesteroles son potenciales disruptores endocrinos. Se cuantificaron fitoesteroles en sedimentos de cuatro zonas costeras y dos ríos en el centro-sur de Chile. Se determinó la concentración de esteroles utilizando cromatografía de gas con espectrómetro de masa y las fuentes de materia orgánica sedimentaria se determinaron utilizando proporciones de esteroles y biomarcadores lipídicos. Las concentraciones de esteroles totales (0,03 a 10,4 µg g -1 ) se encuentran dentro del rango informado para otros ecosistemas marinos y la concentración de β-sitosterol (0,01 a 2,01 µg g -1 ) fue menor que la previamente informada para el sistema de surgencia de Perú. Algunas estaciones costeras adyacentes a los ríos presentaron β-sitosterol de origen terrestre. Además se encontró una alta concentración de este compuesto en sedimentos de estaciones más oceánicas, confirmando que este esterol también puede ser producido por fitoplancton. Al considerar la concentración y presencia-ausencia de esteroles en sedimentos, no fue posible encontrar diferencias significativas entre las cuatro áreas costeras. Sin embargo, se obtuvo una clara diferencia entre la...

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Section: Sources Of Phytosterolssupporting

confidence: 91%

Section: Sterol Sourcementioning

confidence: 99%

Section: Sterol Sourcementioning

confidence: 99%

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Distribution and sources of phytosterols in coastal and river sediments of south central Chile

Saavedra

Quiñones

Becerra

2014

lajar

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“…Coprostanol is a product of cholesterol microbial reduction in the digestive tracts of human and higher vertebrates [8], while epi-coprostanol is the isomer of coprostanol which is formed during the microbial digestion process from coprostanol [9]. These groups of compounds were chosen because they are related to each other because of the presence of bacterial colonies together with the sewage or when there are presence of organic matter that needs to be decomposed [8,10]. This research is part of an interdisciplinary study of temporal variations in bacterial-sewage derived organic matter which was carried out in order to elucidate changes in organic materials and distinguish microbial communities.…”

Section: Introductionmentioning

confidence: 99%

Vertical profiles of bacterial-sewage derived biomarkers in marine sediment

Amiruddin

Ali²

2013

AIP Conference Proceedings

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“…This is due to the difficulty involved in the disposal of the great volume of material produced, as well as the physical, geochemical and biological impact caused by such a procedure. Beyond the need to identify contamination sources, it is essential to understand the transport processes involved and discover where the material will finally be deposited in order to introduce measures capable of controlling and mitigating contamination by human waste (Takada et al, 1997;Seguel et al, 2001). …”

Section: Introductionmentioning

confidence: 99%

A comparison between faecal sterols and coliform counts in the investigation of sewage contamination in sediments

Costa

Carreira

2005

Braz. j. oceanogr.

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nine sediment samples (0-2 cm) were collected from Botafogo Cove (southwestern part of Guanabara Bay) in order to compare the use of chemical (coprostanol) and biological markers (E. coli and total coliforms) in identifying faecal contamination. The values found (organic carbon -6.0 to 64.8 mg g -1 ; coprostanol -1.4 to 105 µg g -1 ; E. coli -< 30 to 2400 NMP/10g and total coliforms -40 to 9300 NMP/10g) were similar to or even higher than those observed in other contaminated areas of Guanabara Bay. In stations close to the shoreline, both coprostanol concentration and bacteria count confirmed that domestic sewage had accumulated in the cove. Coprostanol concentrations were still relatively high in the stations furthest from contamination sources, although faecal material represented a smaller fraction of the total organic carbon originated by dilution in waters containing algae. Reduction was proportionately higher by virtue of the use of the colimetric assessment method. This result may be associated with the effect that environmental variables (light, salinity, temperature) may have on the survival of bacteria during transport and deposition of sewage particles. Consequently, based on these results, coprostanol may be considered the better indicator of the faecal contamination level in Botafogo Cove sediments. R E S U M OEm setembro de 2002, foram coletadas nove amostras de sedimento superficial (0-2 cm) na Enseada de Botafogo (sudoeste da Baía de Guanabara/RJ), a fim de comparar o uso de marcadores químicos (coprostanol) e biológicos (E. coli e coliformes totais) na identificação da contaminação fecal da região. Os resultados obtidos (carbono orgânico -6,0 to 64,8 mg g -1 ; coprostanol -1,4 to 105 µg g -1 ; E. coli -< 30 to 2400 NMP/10g e coliformes totais -40 to 9300 NMP/10g) foram iguais ou maiores aos observados em outras áreas contaminadas da Baía de Guanabara. Nas estações próximas à linha de costa, as concentrações de coprostanol e as contagens das bactérias confirmaram que o esgoto doméstico se acumulou no sedimento da enseada. As concentrações de coprostanol se mantiveram altas nas estações distantes das fontes de contaminação, porém o material fecal representou uma menor fração do carbono orgânico. Nessas mesmas estações, redução na contagem de colimetria foi proporcionalmente mais alta, provavelmente pela baixa sobrevivência das bactérias devido ao efeito de luz, salinidade e temperatura. durante o transporte e deposição das partículas de esgoto. Portanto, baseando-se nos resultados obtidos, o coprostanol foi um indicador mais adequado da contaminação fecal nos sedimentos da Enseada de Botafogo.

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Tracing Sewage in the Marine Environment: altered signatures in Concepción Bay, Chile

Cited by 45 publications

References 25 publications

Distribution and sources of phytosterols in coastal and river sediments of south central Chile

Distribution and sources of phytosterols in coastal and river sediments of south central Chile

Vertical profiles of bacterial-sewage derived biomarkers in marine sediment

A comparison between faecal sterols and coliform counts in the investigation of sewage contamination in sediments

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