Metal concentrations in Sargassum algae from coastal waters of Nha Trang Bay (South China Sea)

Chernova, E. N.; Sergeeva, O. S.

doi:10.1134/s1063074008010082

Cited by 13 publications

(6 citation statements)

References 4 publications

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“…On the other hand, algae floating on the water surface, such as the brown macroalgae Sargassum spp., have been reported in the literature (e.g., Parr, 1939;Butler & Stoner, 1984;Chernova & Sergeeva, 2008) as well as in various local news media. These surface plants are known to provide important habitat (food and shade) for fish, shrimp, crab, and other marine organisms, including several threatened species of turtles (South Atlantic Fishery Management Council, 2002;Witherington & Hirama, 2006), yet their potential relationship with fish populations and larvae transport has not been documented, possibly due to lack of concurrent data.…”

Section: Introductionmentioning

confidence: 93%

A novel ocean color index to detect floating algae in the global oceans

2009

Remote Sensing of Environment

735

458

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Section: Introductionmentioning

confidence: 93%

A novel ocean color index to detect floating algae in the global oceans

2009

Remote Sensing of Environment

735

458

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“…1-5) and fine-grained greyish mud (sts. [6][7][8]. The oxidised region (one to three or four centimetres of sediment) is typically orange-brown because of Fe and Mn oxide accumulation.…”

Section: Textural and Mineral Composition Of Surface Sedimentsmentioning

confidence: 99%

“…The Ni content corresponds to or exceeds the respective ERL value in the sediments at most transitional and marine locations (sts. [3][4][5][6][7][8] and is much higher than the ERM level in a single sediment sample at the transitional station 4. The Pb and Cu contents are much lower than the respective ERM values at all locations, and correspond to the respective ERL values at most locations while exceeding the ERL levels at stations 3 and 4.…”

Section: Abundance and Distribution Of Major And Trace Elements In Sumentioning

confidence: 99%

“…Marine sediments (sts. [6][7][8] are rich in bioavailable forms of Mn and Pb because of the association with amorphous Fe-oxyhydroxides and carbonates. The transitional sediments are depleted in bioavailable forms in most of the studied metals.…”

Section: Speciation Of Major and Trace Elements In Surface Sedimentsmentioning

confidence: 99%

“…The aquaculture activity has been reported to contribute to the ecosystem with heavy metals in the farming environment in Nha Trang Bay and Van Phong Bay [35]. Elevated metal concentrations were obtained in macrophytes that were collected in estuarine waters in the city of Nha Trang [8]. The study on the sediments from coastal lagoons of Khanh Hoa Province reported generally low metal levels that were derived from rocks and soils of the watersheds [42].…”

Section: Introductionmentioning

confidence: 99%

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Relationship between Bulk Metal Concentration and Bioavailability in Tropic Estuarine Sediments

Koukina¹,

Лобус²,

Peresypkin³

et al. 2016

Applied Studies of Coastal and Marine Environments

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elements, their chemical forms and the mineral composition, organic matter (TOC) and carbonates (TIC) in surface sediments from the Cai River estuary and Nha Trang Bay were first determined along the salinity gradient. The abundance and ratio of major and trace elements in surface sediments are discussed in relation to the mineralogy, grain size, depositional conditions, reference background and SQG values. Most trace-element contents are at natural levels and are derived from the composition of rocks and soils in the watershed. A severe enrichment of Ag is most likely derived from metal-rich detrital heavy minerals such as Ag-sulphosalts. Along the salinity gradient, several zones of metal enrichment occur in surface sediments because of the geochemical fractionation of the riverine material. The parts of actually and potentially bioavailable forms (isolated by four single chemical reagent extractions) are most elevated for Mn and Pb (up to 36% and 32% of the total content, respectively). The possible anthropogenic input of Pb in the region requires further study. Overall, the most bioavailable parts of trace elements are associated with easily soluble amorphous Fe and Mn oxyhydroxides. The sediments are primarily enriched with bioavailable metal forms in the riverine part of the estuary. Natural (such as turbidities) and human-generated (such as urban and industrial activities) pressures are shown to influence the abundance and speciation of potential contaminants and therefore change their bioavailability in this estuarine system.

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