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| Gnandi, K.. |
| L'impact environnemental du rejet dans la mer des déchets miniers issus du traitement des phosphates de Hahotoké-Kpogamé(Togo) a été étudié dans ce manuscrit. Les résultats des analyses chimiques rnontrent de fortes concentrations des éléments Cd (2-44 mg/kg), Cr (1 15-753 mg/kg), Cu (22-184 mg/kg), Ni (19-281 mg/kg), V (38-329 mg/kg), Sr (179-643 mg/kg), Pb (22-176 nig/kg), Zn (60-632 mgikg) et du Zr (18-8928 mg/kg) dans la fraction < 63 um des sédiments marins côtiers. Les concentrations du Cd diminuent du grain grossier (silte) au grain fin (argile), alors que celles du Cr, Cu, Ni, V, Sr, Zn et Pb augmentent lorsque la granulométrie évolue vers le grain fin. Les phénomènes de transport par les courants littoraux, de tri par densité et de... |
| Tipo: Journal Contribution |
Palavras-chave: Marine pollution; Phosphates; Heavy metals; Togo; Phosphates; Http://aims.fao.org/aos/agrovoc/c_7801; Http://aims.fao.org/aos/agrovoc/c_35986. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/1442 |
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| Sánchez, G.E.; Morales, E.; Guillot, G.; Vidal, L.A.. |
| Microalgae are important for the restoration of coastal lagoon ecosystems affected by human activities because they are useful indicators of variations of salinity and levels of nutrients such as silicate and phosphate in the water column. With the centric diatom Actinocyclus normanii from Ciénaga Grande de Santa Marta (Colombian Caribbean) we conducted several experiments to evaluate the responses of this species at three levels of salinity (0, 15 and 25) and two initial densities (100 and 800 cells·ml-1) to nine treatments combining several concentrations of phosphate (0, 1,5 and 3,0 µmol·l-1) and silicate (10, 150 and 300 µmol·l-1). All treatments were maintained with light intensity of 57,9 mE-2·seg-1, photoperiod of 12:12 hrs, temperature between 22... |
| Tipo: Journal Contribution |
Palavras-chave: Phosphates; Salinity; Silicates; Phosphates; Salinity; Silicates; Http://aims.fao.org/aos/agrovoc/c_35986; Http://aims.fao.org/aos/agrovoc/c_6751; Http://aims.fao.org/aos/agrovoc/c_28560. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/3124 |
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| Ammar, M.S.A.; Ghobashi, A.A.; Omran, M.A.; Shaaban, A.M.. |
| Using Using SCUBA diving, surveying the coral reef communities at four sites, Red Sea Egypt was done. These sites are: Ras El Behar (polluted by petroleum oil), El-Hamraween (impacted by phosphate shipping), Shabrour Umm Gam’ar (harmed by recreational activities and has been suffering from the outbreak of Acanthaster planci during 1998) and Kalawy (a control site). The skeletal growth of the coral Stylophora pistillata was promoted greatly at the expense of other corals, in presence of chronic oil pollution (Ras El-Behar). In contrast, this species was completely suppressed in presence of phosphate and sulphur enrichment. Petroleum oil led to coral scarcity, space monopolization by one coral and increased sea urchins and algae. Coral reefs enriched with... |
| Tipo: Journal Contribution |
Palavras-chave: Field Study; Coral reefs; Hydrocarbons; Phosphates; Coral reefs; Hydrocarbons; Phosphates; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_3719; Http://aims.fao.org/aos/agrovoc/c_35986. |
| Ano: 2007 |
URL: http://hdl.handle.net/1834/1909 |
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