A survey of the eutrophication state of an urbanized tropical estuary, the case of the Great Vitória Estuarine System, Brazil
| Autor: | Carina C. Dos Santos, Gilberto Fonseca Barroso, Eustáquio V.R. Castro, Taciana Kramer Pinto, Maristela de Araújo Vicente, Renato Rodrigues Neto, Catarina D. Boina, Caroline Fiório Grilo |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Hydrology geography geography.geographical_feature_category business.industry 010604 marine biology & hydrobiology Meiobenthos Sewage Estuary General Medicine 010501 environmental sciences 01 natural sciences Fecal coliform chemistry.chemical_compound Water column Productivity (ecology) Nitrate chemistry Environmental science business Eutrophication 0105 earth and related environmental sciences |
| Zdroj: | Brazilian Journal of Aquatic Science and Technology. 20:21-28 |
| ISSN: | 1983-9057 1808-7035 |
| DOI: | 10.14210/bjast.v20n1.5230 |
| Popis: | Although, estuarine ecosystems have an ecological and economical importance as they have a high biological productivity and occur within a unique and dynamic environment, they have been subjected to anthropogenic alterations. The Great Vitória Estuarine System (GVES), Espírito Santo State, Brazil, is not an exception, as urbanization is growing around it with a high quantity of sewage been added to the system. In order to evaluate the eutrophication state as well as the meiofauna response to it, several parameters in both sediments and in the water column were assessed. Orthophosphate, nitrite, nitrate, ammonia, chla and Fecal Coliform counts (FC) ranged from 0.2 to 3.2 μM, 0.25 to 1.14 μM, 1.83 to 0.19μM, 4.19 to 49.23 μM, 0.61 to 6.72 μg/L and 14 to 5.0x104 MPN/100 mL of water, respectively. These results showed that the GVES is under an eutrophication process and that the Passagem Channel experienced the largest impacts. Sewage plays an important role in this eutrophication process as indicated by PCA and correlations tests. The density of meiofauna showed similar values to those found in environments with similar levels of anthropogenic stress. This multi-approach evaluation revealed several aspects of the impacted estuary and could be used as an important tool to manage better the estuary. |
| Databáze: | OpenAIRE |
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