Please use this identifier to cite or link to this item: http://repositorio.ufc.br/handle/riufc/65665
Type: Artigo de Periódico
Title: Natural and anthropogenic emissions of N and P to the Parnaíba River Delta in NE Brazil
Authors: Paula Filho, Francisco José de
Marins, Rozane Valente
Lacerda, Luiz Drude de
Keywords: Nitrogen;Phosphorus;Nutrient transpor;Nitrogênio;Fósforo;Nutriente - Transporte
Issue Date: 2015
Publisher: Estuarine, Coastal and Shelf Science
Citation: PAULA FILHO, Francisco José de; MARINS, Rozane Valente; LACERDA, LUIZ Drude de. Natural and anthropogenic emissions of N and P to the Parnaíba River Delta in NE Brazil. Estuarine, Coastal and Shelf Science, Stellenbosch, v. 166, p. 34-44, 2015.
Abstract: The Parnaiba River Delta is the largest open sea delta in the Americas, having a unique ecological importance for the conservation of wildlife and fisheries resources. However, little is known about the biogeochemistry of this ecosystem. This study estimates N and P emissions to the delta using emissions factors, calibrated with field samples and N and P concentrations in different compartments of the delta. The estimated loads totaled 14.517 t N year 1 and 8.748 t P year 1, indicating that anthropogenic N and P emissions outweigh natural emissions by approximately 5 and 10 times, respectively. The activities that contribute the most to this result are livestock farming, agriculture and the release of untreated domestic sewage. The flows of N and P from the estimated loads corresponded to 339 kg N km 2 year 1 and 204 kg P km 2 year 1, so the region can be classified as “meso-active” and “eury-active” with regard to the transfer of nutrients. These results are consistent with the coastal megabasin design (COSCATs) proposed by Meyback et al. (2006). This article presents a first approach to the calculation of an estimated annual emissions inventory of N and P for the lower basin of the Parnaíba River and its coastal region, repre- senting an approach that has been satisfactorily used in assessing the sensitivity of estuarine systems in northeastern Brazil.
URI: http://www.repositorio.ufc.br/handle/riufc/65665
ISSN: 0272-7714
Appears in Collections:LABOMAR - Artigos publicados em revistas científicas

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