Certain metals in three coastal algae from Ras Beirut waters

Shiber, John G.; Shatila, T.

doi:10.1007/bf00030073

Cited by 15 publications

(6 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such a conclusion was reached with regard to algae (Helz et al, 1975), the moults of certain crustaceans (Martin, 1970;Bertine and Goldberg, 1972) and the carbonate shell material of some molluscan species (Oreshkin, 1977). Studies recently conducted on the coast of Ras Beirut, Lebanon, have shown ranges of Pb, Cu, and Zn in various molluscs (Shiber and Shatila, 1978;Shiber, 1979b), algae (Shiber and Shatila, 1979;Shiber, 1979b), whole prawns and eggs of sea urchins (Shiber, 1979a), and crabs (Shiber, 1977) similar to those found in the Beirut samples of sediment in this study.…”

Section: Resultssupporting

confidence: 83%

See 1 more Smart Citation

Metal concentrations in marine sediments from Lebanon

Shiber¹

1980

Water Air Soil Pollut

Self Cite

View full text Add to dashboard Cite

Abstract. Nearshore shallow marine sediment was collected from fourteen points along the Lebanese coast and analyzed for heavy metals. The samples consisting of medium to fine sand (those from Khaldt, Rmeileh, and Sidon) had generally lower metal concentrations than those made up of very coarse to coarse sand (Tabarja, Beirut, Adloun), fine to very fine sa~ld (Beiru0, and very find sand to coarse silt (Nahr Ibrahim Village). The sediments which had the highest Pk, Zn, and Mn were from Beirut and Adloun. Those with the highest Fe concentrations came from Beirut and Nahr lbrahim Village, and the highest Cu occurred in sediments collected from Beirut and Tabarja. Th~ metal levels found do not seem to reflect abnormal contamination in the areas sampled. More extensive werk is recommended.

show abstract

Section: Resultssupporting

confidence: 83%

“…Nearshore surface seawater from the coast of Beirut has also been analyzed for heavy metals (Shiber and Shatila, 1978;Shiber, 1979a,b). However, the concentrations reported were abnormally high, except for possibly Cu, Fe, and Zn.…”

Section: Resultsmentioning

confidence: 99%

Metal concentrations in marine sediments from Lebanon

Shiber¹

1980

Water Air Soil Pollut

Self Cite

View full text Add to dashboard Cite

show abstract

“…Since alkaline pH makes Pb insoluble (Shiber and Shatila 1979) and thus unavailable to algae, some other factors probably induce the bioavailability of Pb. In U. lactuca, phosphate may act as a control mechanism, either decreasing the toxicity of Pb or controlling its uptake (Shiber and Washburn 1978); so an increase in Pb concentration may be due to a reduction in phosphate levels.…”

Section: Seasonal Variabilitymentioning

confidence: 99%

Metal accumulation in a biological indicator (Ulva rigida) from the lagoon of Venice (Italy)

Favero

Cattalini

Bertaggia

et al. 1996

Arch. Environ. Contam. Toxicol.

View full text Add to dashboard Cite

Ulva rigida (C. Agardht) was collected from the Palude della Rosa (lagoon of Venice), a particular area characterized by a salinity gradient, from December 1991 to June 1993. Metal contents (Al, Mn, Fe, Cu, Zn, Cr, Co, Ni, Cd, and Pb) were determined by atomic absorption spectrophotometry and statistically analysed for differences between months and sampling sites. The mean seasonal variability is very significant (p < 0.001) for all studied metals. Seasonal trends are comparable for groups of metals according to possible functional similarities. A significant positive correlation was calculated for the pairs Fe-Al and Fe-Pb. Mechanisms regulating metal uptake are discussed, particularly the role of Fe and its linear relationship with Al. Metal concentrations in relation to salinity also were studied. Larger amounts of Fe, Zn, and Cd accumulated in correspondence of lower salinity, may be owing to both higher metal activity and burden of bioavailable metals in freshwater flowing into the Palude. Calculation of concentration factor (CF) indicates that U. rigida specifically accumulates Fe. CF linearly correlates with dissolved metal concentrations, suggesting that U. rigida is a good bioindicator of metal bioavailability, although seasonal active accumulation occurs in some cases (Mn). Metal concentrations determined in this macroalga support the conclusion that the studied area is rich in bioavailable Fe and poor in toxic metals. In any case, a great affinity for Al in U. rigida may be proposed.

show abstract

“…Copper concentrations in the samples studied here are similar to although somewhat lower than levels in the specimens previously analysed, while zinc is more variable and much higher . Zinc levels reported here in C. spinosa are also higher than levels found in the other brown algae thus far studied for trace elements in the Ras Beirut area (Shiber and Shatila, 1979 ;Shiber, 1980) . There has been little work done on trace metals in algae from the Mediterranean .…”

Section: Thalassoma Pavo Linnaeus 1758mentioning

confidence: 63%

Metal concentrations in certain coastal organisms from Beirut

Shiber¹

1981

Hydrobiologia

Self Cite

View full text Add to dashboard Cite

Trace metal concentrations were determined in six species of intertidal organisms common to the coast of Ras Beirut, Lebanon . Lead, cadmium, nickel, iron, and zinc were highest in the polychaete, Hermodice carunculata, but the eggs of the sea urchin, Arbacia lixula, had similar iron levels and the sea anemone, Actinia equina, had zinc concentrations which also approached levels in the polychaete . The highest copper occurred in the shore crab, Pachygrapsus transversus, while chromium was highest in the eggs of Arbacia lixula . Cystoseira spinosa, the only alga studied, had average copper and iron concentrations similar to those found in the same species in another study . Together with the sea urchin eggs, C. spinosa exhibited the most variable zinc levels in the present investigation . The fish, Thalassoma pavo, which is rather common along the rocky coastal areas of Lebanon, appeared to have fairly high concentrations of certain elements in relation to levels reported in species of fish from other locations .Sewage, garbage, industrial and agricultural waste materials all enter the Mediterranean from Lebanon without prior treatment, which along with increased land erosion, probably contribute substantially to the availability of metals to the biota studied . It is suggested that more work on trace elements in coastal organisms from the eastern Mediterranean basin be undertaken before any conclusive statements are made . Such work should also investigate the various physiological and biochemical factors involved in metal uptake and retention by each species .

show abstract

Certain metals in three coastal algae from Ras Beirut waters

Cited by 15 publications

References 32 publications

Metal concentrations in marine sediments from Lebanon

Metal concentrations in marine sediments from Lebanon

Metal accumulation in a biological indicator (Ulva rigida) from the lagoon of Venice (Italy)

Metal concentrations in certain coastal organisms from Beirut

Contact Info

Product

Resources

About