| Journal: | Anais da Academia Brasileira de Ciencias |
| Database: | PERIÓDICA |
| System number: | 000435944 |
| ISSN: | 0001-3765 |
| Authors: | Marins, Rozane V1 Lacerda, Luiz D1 Araújo, Isabel Cristina S2 Fonseca, Louize V1 Silva, Francisco A.T.F3 |
| Institutions: | 1Universidade Federal do Ceara, Instituto de Ciencias do Mar, Fortaleza, Ceara. Brasil 2Universidade Federal do Ceara, Departamento de Engenharia Agrícola, Fortaleza, Ceara. Brasil 3Instituto Nacional de Pesquisas Espaciais, Eusebio, Ceara. Brasil |
| Year: | 2020 |
| Volumen: | 92 |
| Number: | 3 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, descriptivo |
| English abstract | This study compares two mangroves with different land uses in the Jaguaribe River estuary, harboring large shrimp farms, and in the more pristine Pacotí River estuary. Normalized Difference Vegetation Index (NDVI) was used to compare the overall health of the forests. Measures of suspended matter (TSS), total (TP), particulate (PartP) and soluble reactive phosphorus (SRP) in the inflow and outflow waters of tidal channels draining the mangroves were performed during tidal cycles. NDVI varied from 0.65 in the Jaguaribe estuary to 0.85 in the Pacotí, suggesting the impact of shrimp farm effluents on mangrove canopy cover. The shrimp farm influenced site showed 10 times larger absolute ∑P (TP + PartP + SRP) = 1.2-5.2 kg.hr-1) flux than the pristine site (∑P = 0.22 kg.hr-1). Tidal balances showed smaller retentions of the total influx: 28-54%; 44-45%; 38-65% and 8-53% for TSS; TP; SRP; and PartP respectively, in the shrimp farm influenced site to over 93% of the total tidal input of TSS and all P fractions in the pristine mangrove. This suggests that mangrove phosphorus accumulation is decreased in the forest with lower NDVI and limits mangrove’s potential as a natural barrier to the nutrient transport to adjacent estuarine and coastal waters |
| Disciplines: | Geociencias, Medicina veterinaria y zootecnia |
| Keyword: | Hidrología, Manglares, Hidroquímica, Materia suspendida, Fósforo, Indice de vegetación de diferencia normalizada (NDVI), Granjas camaroneras, Efluentes |
| Keyword: | Hydrology, Mangrove swamps, Hydrochemistry, Normalized difference vegetation index (NDVI), Phosphorus, Suspended matter, Effluents, Shrimp farms |
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