Assessment of lipid compounds and phosphorus in mangrove sediments of Santa Catarina Island, SC, Brazil
| Autor: | Fabricio A. Hansel, Luciana Mater, Luiz A. S. Madureira, Marcelo R. Alexandre |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2004 |
| Předmět: |
Total organic carbon
chemistry.chemical_classification mangrove business.industry Ratones Phosphorus Outfall sediments Sewage chemistry.chemical_element General Chemistry Coprostanol chemistry.chemical_compound chemistry coprostanol Environmental chemistry Environmental science Total phosphorus Organic matter Mangrove phosphorus business Itacorubi |
| Zdroj: | Journal of the Brazilian Chemical Society, Volume: 15, Issue: 5, Pages: 725-734, Published: OCT 2004 Journal of the Brazilian Chemical Society v.15 n.5 2004 Journal of the Brazilian Chemical Society Sociedade Brasileira de Química (SBQ) instacron:SBQ |
| Popis: | Lipid compounds from seven sedimentary stations were used to assess sources of organic matter in two mangrove ecosystems located on Santa Catarina Island, southern Brazil. Ratones Mangrove forms part of a national preservation area and has suffered only minimal human influence. Itacorubi Mangrove has been seriously impacted by anthropogenic activities due to its proximity to the city of Florianopolis. Higher levels of total organic carbon (2.13 mmol g-1) and total phosphorus (14.9 µmol g-1) were found in Ratones Mangrove sediments. However, sediments from Itacorubi showed a greater percentage of inorganic phosphorus (84%) than those from Ratones (58%), which can be related to urban contamination. The importance of sewage outfalls into the tidal creeks crossing Itacorubi Mangrove was clearly seen as the concentration of coprostanol averaging 7.7 ng g-1 in Ratones sediments was found to be as high as 1.42 µg g-1 in Itacorubi, which is comparable to other sewage contaminated hydrosystems. Lipídios provenientes de sete estações sedimentares foram usados para avaliar fontes de matéria orgânica em dois manguezais localizados na Ilha de Santa Catarina, SC. O manguezal de Ratones encontra-se em uma área de preservação permanente, com pouca influência humana. Em contraste, o manguezal do Itacorubi tem sofrido sérios impactos por atividades antrópicas devido à sua proximidade da cidade de Florianópolis. Os maiores níveis de carbono orgânico (2,13 mmol g-1) e fósforo total (14,9 µmol g-1) foram encontrados em Ratones. Entretanto, o percentual de fósforo inorgânico determinado no manguezal de Itacorubi (84%) foi maior do que o de Ratones (58%), possivelmente devido à contaminação urbana. A importância do aporte de esgoto doméstico para o manguezal do Itacorubi foi avaliada a partir da concentração do coprostanol que variou, em média, de 7,7 ng g-1 em Ratones para 1,42 µg g-1 no Itacorubi. Esse nível elevado é compatível com valores encontrados em outros ambientes contaminados. |
| Databáze: | OpenAIRE |
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