CARACTERÍSTICAS GEOQUÍMICAS DE LOS SEDIMENTOS SUPERFICIALES DE LA LAGUNA LA RESTINGA, ISLA DE MARGARITA, VENEZUELA
| Main Authors: | Juan Velásquez, Arístide Márquez, Ivis Fermín, Fabiola López, Deudedit Hernández, William Senior |
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| Format: | Article |
| Terbitan: |
, 2016
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/160826 |
Daftar Isi:
- This research aims to evaluate some chemical parameters of surface sediments of coastal La Restinga lagoon, located in Margarita Island, Nueva Esparta state, Venezuela. Using classical methodology for geochemical, grain size and texture sediment percentage of organic carbon and total organic matter, and calcium carbonate was analyzed. Additionally, the concentrations of total nitrogen, total phosphorus and aliphatic hydrocarbons were determined. The results showed that in the lagoon La Restinga prevailing sedimentary sandy texture, above the sandy-loam and sandy-clay. The percentages of total organic carbon, total organic matter and calcium carbonate respectively varied as follows: 1.70-25.53%, 11.10-82.10% and 2.93-44.01%. Concentrations of 282.10-1571.80 mg kg-1 in total nitrogen, 419.50-2033.70 mg kg-1 in total phosphorus and 5.65-63.18 mg kg-1 for aliphatic hydrocarbons were determined. The total organic matter in the lagoon La Restinga is distributed based on the fine particles of sediment and the presence of mangroves, in turn calcium carbonate, was associated mainly to contributions from organisms with calcareous shell. The low values of the ratio NT/PT (under 5) suggest limiting the nitrogen in the ecosystem, and natural or anthropogenic enrichment of phosphorus in the sediment. The levels of certain aliphatic hydrocarbons, are not considered as contaminants levels as established by CARIPOL (1980), except in the eastern end of the main body of the lake. According to the points made in this study, we can infer that the Restinga Lagoon symptoms of degradation product of human intervention in the ecosystem.
- Bol. Inst. Oceanogr. Venezuela, 55 (1): 54-68 (2016) https://figshare.com/articles/CARACTER_STICAS_GEOQU_MICAS_DE_LOS_SEDIMENTOS_SUPERFICIALES_DE_LA_LAGUNA_LA_RESTINGA_ISLA_DE_MARGARITA_VENEZUELA_/4004481