A review of strategies to monitor water and sediment quality for a sustainability assessment of marine environment

Sany, Seyedeh Belin Tavakoly; Hashim, Rosli; Rezayi, Majid; Salleh, Aishah; Safari, Omid

doi:10.1007/s11356-013-2217-5

Cited by 85 publications

(21 citation statements)

References 102 publications

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“…Further research revealed significant differences in the sources and concentration of PAHs in sediment samples of near-shore vs. offshore areas. PAH concentrations in sediment samples collected from near-shore sites (city hinterland) were greater than the PAH concentrations in offshore areas [11], [30], [37], [38], [39]. This implies that PAH concentrations in near-shore areas are influenced by lateral transport, such as run-off and the transportation of water due to daily rainfall [12], [40].…”

Section: Resultsmentioning

confidence: 99%

Polycyclic Aromatic Hydrocarbons in Coastal Sediment of Klang Strait, Malaysia: Distribution Pattern, Risk Assessment and Sources

et al. 2014

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Concentration, source, and ecological risk of polycyclic aromatic hydrocarbons (PAHs) were investigated in 22 stations from surface sediments in the areas of anthropogenic pollution in the Klang Strait (Malaysia). The total PAH level in the Klang Strait sediment was 994.02±918.1 µg/kg dw. The highest concentration was observed in stations near the coastline and mouth of the Klang River. These locations were dominated by high molecular weight PAHs. The results showed both pyrogenic and petrogenic sources are main sources of PAHs. Further analyses indicated that PAHs primarily originated from pyrogenic sources (coal combustion and vehicular emissions), with significant contribution from petroleum inputs. Regarding ecological risk estimation, only station 13 was moderately polluted, the rest of the stations suffered rare or slight adverse biological effects with PAH exposure in surface sediment, suggesting that PAHs are not considered as contaminants of concern in the Klang Strait.

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Section: Resultsmentioning

confidence: 99%

Polycyclic Aromatic Hydrocarbons in Coastal Sediment of Klang Strait, Malaysia: Distribution Pattern, Risk Assessment and Sources

et al. 2014

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“…Biodiversity monitoring is largely used for the environmental impact assessment of anthropogenic activities. According to tradition, in marine ecosystems, such impacts are assessed through the inventory of benthic macro‐invertebrates, which involve the sorting and the morphotaxonomic identification of thousands of specimens for a single site (Borja, Ranasinghe, & Weisberg, ; Tavakoly Sany, Hashim, Rezayi, Salleh, & Safari, ). Identified taxa are being ascribed to ecological weights that are used to calculate biotic indices (BIs), such as AMBI (Borja, Franco, & Pérez, ), ISI (Rygg, ), NSI or NQI1 (Rygg, ).…”

Section: Introductionmentioning

confidence: 99%

Supervised machine learning outperforms taxonomy‐based environmental DNA metabarcoding applied to biomonitoring

Cordier

Forster

Dufresne

et al. 2018

Molecular Ecology Resources

128

106

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Biodiversity monitoring is the standard for environmental impact assessment of anthropogenic activities. Several recent studies showed that high-throughput amplicon sequencing of environmental DNA (eDNA metabarcoding) could overcome many limitations of the traditional morphotaxonomy-based bioassessment. Recently, we demonstrated that supervised machine learning (SML) can be used to predict accurate biotic indices values from eDNA metabarcoding data, regardless of the taxonomic affiliation of the sequences. However, it is unknown to which extent the accuracy of such models depends on taxonomic resolution of molecular markers or how SML compares with metabarcoding approaches targeting well-established bioindicator species. In this study, we address these issues by training predictive models upon five different ribosomal bacterial and eukaryotic markers and measuring their performance to assess the environmental impact of marine aquaculture on independent data sets. Our results show that all tested markers are yielding accurate predictive models and that they all outperform the assessment relying solely on taxonomically assigned sequences. Remarkably, we did not find any significant difference in the performance of the models built using universal eukaryotic or prokaryotic markers. Using any molecular marker with a taxonomic range broad enough to comprise different potential bioindicator taxa, SML approach can overcome the limits of taxonomy-based eDNA bioassessment.

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“…Sediments are good hosts of highly toxic pollutants from natural and anthropogenic sources [74] and have been reported as the biggest sink and major reservoir for heavy metals [75][76][77][78][79][80][81][82]. Sediments enhance accumulation of heavy metals in benthic invertebrates, thereby transferring them to higher levels of the food chain [83][84][85][86][87].…”

Section: Superficial Sedimentsmentioning

confidence: 99%

Peer Review #2 of "Mercuric pollution of surface water, superficial sediments, Nile tilapia (Oreochromis nilotica Linnaeus 1758 [Cichlidae]) and yams (Dioscorea alata) in auriferous areas of Namukombe stream, Syanyonja, Busia, Uganda (v0.1)"

Rao¹

2019

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The health risk indices recorded were from 0.011 to 0.320 and 0.033 to 0.985 for adults and children respectively. The mean THg content of the sediments, edible muscles of O. nilotica and D. alata were within acceptable WHO/US EPA limits. About 91.7% of the water samples had mean THg above US EPA maximum permissible limit for mercury in drinking water. Consumption of D. alata grown within 5 m radius up sluice of Namukombe stream may pose deleterious health risks as reflected by the health risk index of 0.985 being very close to one. From the pollution and risk assessments, mercury use should be delimited in Syanyonja artisanal gold mining areas. Solution to abolish mercury-based gold mining in the area need to be sought as soon as possible to avert the accentuating health, economic and ecological disaster arising from the continuous discharge of mercury into the surrounding areas. Other mercury-free gold recovering methods such as use of borax, sluice boxes and direct panning should be encouraged. Waste management system for contaminated wastewater, used mercury bottles and tailings should be centralized.

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A review of strategies to monitor water and sediment quality for a sustainability assessment of marine environment

Cited by 85 publications

References 102 publications

Polycyclic Aromatic Hydrocarbons in Coastal Sediment of Klang Strait, Malaysia: Distribution Pattern, Risk Assessment and Sources

Polycyclic Aromatic Hydrocarbons in Coastal Sediment of Klang Strait, Malaysia: Distribution Pattern, Risk Assessment and Sources

Supervised machine learning outperforms taxonomy‐based environmental DNA metabarcoding applied to biomonitoring

Peer Review #2 of "Mercuric pollution of surface water, superficial sediments, Nile tilapia (Oreochromis nilotica Linnaeus 1758 [Cichlidae]) and yams (Dioscorea alata) in auriferous areas of Namukombe stream, Syanyonja, Busia, Uganda (v0.1)"

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