Polycyclic aromatic hydrocarbons and changes in the trophic structure of polychaete assemblages in sediments of Todos os Santos Bay, Northeastern, Brazil

Venturini, Natalia; Tommasi, Luiz Roberto

doi:10.1016/s0025-326x(03)00331-x

Cited by 96 publications

(51 citation statements)

References 32 publications

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“…As a general characteristic, the concentrations of allochthonous PAHs in the sediments of Taylor Creek are lower than the moderately to highly PAHs polluted sites worldwide (Tan and Heit, 1981;Baumard, et al, 1988;Meniconi, et al, 2002;Venturini and Tommasi, 2004). However, the values are significantly elevated when compared with typical levels of PAHs found in pristine areas (Cripps, 1994;Baumard, et al, 1998 andWebster, et al, 2001).…”

Section: Discussionmentioning

confidence: 92%

Preliminary assessment of trace metals and polycyclic aromatic hydrocarbons in the sediments

Okafor

Opuene

2007

Int. J. Environ. Sci. Technol.

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Total concentrations of Cd, Cr, Co, Fe, Pb, Ni, Mn and Zn were determined by atomic absorption spectrophotometry in the surface sediments of Taylor Creek, Southern Nigeria. The most concentrated trace metals, ranging from 113.2 to 5160.7 mg/g-dry weights were Fe, Pb, Mn, Ni and Zn. There was no significant variation in sediment-associated metal levels (P>0.05). The Metal Pollution Index (MPI) was highest at Agbia/Nedugo and is attributed to local contamination of the Creek. The concentrations of low molecular weight polycyclic aromatic hydrocarbons (PAHs) were also detected and quantified in the sediments by capillary gas chromatography equipped with a flame ionization detector. The concentration levels of 178.1-1266.3 mg/g-wet weights were high for the PAHs. The results indicate that the pollutants, which are bio-accumulatable, could contribute to inferior biodiversity, and shifts in community composition from sensitive to tolerant taxa.

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Section: Discussionmentioning

confidence: 92%

Preliminary assessment of trace metals and polycyclic aromatic hydrocarbons in the sediments

Okafor

Opuene

2007

Int. J. Environ. Sci. Technol.

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“…This does not happen because of the current input of anthropogenic sources of organic matter whose main origin seems to be effluents rich in petroleum hydrocarbons (PAHs), derived from the RLAM. Indeed, [45], by analyzing the sediments of this portion of the bay, encountered PAH contents above 500 ng•g −1 indicating highly contaminated sediments (Notar et al, 2001 apud [45]). The C/S ratios observed by these same authors, which varied from 1.5 to 13.6, showed a general tendency for the region of oxidating conditions on the bottom with the exception of this area (stations 7 to 11) and the area adjacent to the refinery (stations 2, 3, 4 and 6) where the sulphur contents were high (>1.0%).…”

Section: Discussionmentioning

confidence: 99%

Sedimentary and Geochemical Aspects of a Refinery Impacted Coastal Area: A Case Study of the Todos os Santos Bay (Bahia, Brazil)

Barcellos¹,

Braga²,

Furtado³

et al. 2014

IJG

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The present study was performed in the northeast portion of the Todosos Santos Bay, Bahia State, Brazil, an area under influence of the Landulpho Alves-Mataripe (RLAM) refinery effluents. The aim of this work is to evaluate the modern sedimentary processes based on grain-size analysis, calcium carbonate and sedimentary organic matter concentration and behavior considering the possible effects of the petroleum industry's refining on these sediments. The concentrations and variations of the three main constituents of organic matter (total organic C, total N and organic P), and the resulting elemental ratios (C/N, C/P and N/P), were studied on a seasonal spatial and temporal scale (winter 2004 and summer 2005), therefore subsidizing the environmental analysis, especially in regards to the benthic ecosystem. Fifty samples from twenty-five sampling stations were collected with a grab sampler. Well sorted sandy sediments are observed in coastal sampling stations and in the Caboto channel. The recent deposition of fine sediments was observed especially in the west and central portions of study area. However, these spots contain the highest percentages of organic material, which do not present significant seasonal and spatial variations, revealed by the values of total organic C which reach values of up to 3.1%, total N (0.01% to 0.15%) and the organic P contents that reach a maximum of 15.9 µmol•g −1 . In general, the elemental ratios indicated continental organic matter inputs, probably derived from human activities.

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“…Most of the other polychaetes transplanted to the hydrocarbon polluted sites from clean areas died. Venturini & Tommasi (2004) worked with polychaete assemblages in two bays in northeast Brazil and found that the stations with high organic, high PAH sediments were dominated by carnivorous species while those of sandy sediments with low PAH levels were dominated by subsurface deposit feeders. Ingole et al (2006) found that the most abundant polychaete in the area surrounding the MV River Princess, an oil transport ship containing oil that had been grounded for three years off Goa, India, was the carnivore Pisionideus indica.…”

Section: Polychaetes As Indicators Of Organic Contaminantsmentioning

confidence: 99%

Cytochemical responses of Hediste diversicolor (Nereidae, Polychaete) sampled from polluted sites along the Tunisian coast

Bouraoui¹,

Ghedira²,

Caprì

et al. 2014

RGCI

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Polychaetes are usually the most abundant taxon in benthic communities and have been most often utilized as indicator species of environmental conditions. This review finds that, while the use of indicator species for a particular pollutant is not simple, polychaetes can provide a useful means of assessing the effects of poor environmental conditions. Polychaetes may be used as sensitive monitors of water quality especially in terms of the effects of pollutants on life history characteristics. They may also be utilized as general indicators of community diversity but those species indicative of lower diversity may differ geographically and temporally. While sewage is often a mixture of high organic material and other pollutants such as heavy metals and pesticides, high organic situations associated with aquaculture facilities indicates that members of the Capitella capitata species complex and the dorvilleid genus Ophryotrocha are often dominant. Some species of polychaetes are able to live in sediments very high in trace metal content and body burden of these metals often does not reflect sediment concentrations due to regulation by these species. Many species seem relatively resistant to organic contaminants and pesticides and the effects of these pollutants on life history characteristics of these species may provide a more sensitive assay method. Recent studies using biomarkers in polychaetes to indicate general heavy metal or pesticide contamination has shown some success. Polychaete species known to occur in appreciable densities in the Gulf of Nicoya, Costa Rica, and which have been most often used as indicator species of pollution, are listed as potential taxa for environmental monitoring in this tropical estuary. Rev. Biol. Trop. 56 (Suppl. 4): 11-38. Epub 2009 June 30.Key words: polychaete, indicator species, marine pollution, community diversity, heavy metals, pesticides, organics, biomarkers, tropical, Costa Rica.The polychaetes have long been an obvious choice to act as representative species in the analysis of the health of benthic communities as they are usually the most abundant taxon taken in benthic samples, both in terms of the number of species and numerical abundance. Additionally, unlike nektonic or reptant organism, the polychaetes usually live within the sediments or attached to hard surfaces and, while their larvae may be capable of long distance transport, the adults are relatively inert. This relative immobility ensures chronic exposure to any toxic materials in the environment rather than the episodic exposures of a more vagile organism. Any long-term changes in the wellbeing of the benthos should be reflected in the polychaete community .The life history characteristics of polychaetes also make them good candidates to act as indicator species. The epibenthic filter feeders maximize their exposure to any harmful materials within the water column as they process relatively large amounts of water during feeding. Deposit feeding and interstitial species, which are in intimate c...

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Polycyclic aromatic hydrocarbons and changes in the trophic structure of polychaete assemblages in sediments of Todos os Santos Bay, Northeastern, Brazil

Cited by 96 publications

References 32 publications

Preliminary assessment of trace metals and polycyclic aromatic hydrocarbons in the sediments

Preliminary assessment of trace metals and polycyclic aromatic hydrocarbons in the sediments

Sedimentary and Geochemical Aspects of a Refinery Impacted Coastal Area: A Case Study of the Todos os Santos Bay (Bahia, Brazil)

Cytochemical responses of Hediste diversicolor (Nereidae, Polychaete) sampled from polluted sites along the Tunisian coast

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