title: Anthropogenic sources and distribution of phosphorus in sediments from the Jaguaribe River estuary, NE, Brazil.
abstract: This paper estimates annual P emission to the Jaguaribe River estuary, NE Brazil, responsible for approximately 30% of the country's farmed shrimp production. Emissions increased three times between 2001 and 2006 and reached 43.9 t.year-1. These emissions make aquaculture the third main source of P for this estuary and are much smaller than emissions from agricultural sources and slightly lower than emissions from wastewater. Their relative contribution also increased from 10.5% to 20.5%. Temporal variability of P concentrations in estuarine bottom sediments also suggest an increase, but not as evident as the emissions. The spatial distribution and speciation of P (total P and inorganic P) in sampling stations located upstream and downstream from the main aquaculture area confirmed the importance of this source. Inorganic P was the dominant form present in sediments downstream and showed an increase from 67% to 75% of the total P present in the sediment.
authors: aboratório de Biogeoquímica Costeira, Instituto de Ciências do Mar, Universidade Federal do Ceará – UFC, Fortaleza, CE, Brazil.
authors: R V
authors: RV
authors: Marins
authors: F J
authors: FJ
authors: Paula Filho
authors: S A
authors: SA
authors: Eschrique
authors: L D
authors: LD
authors: Lacerda
mesh_terms: D000818:Animals; D017756:Aquaculture; D001938:Brazil; D004784:Environmental Monitoring / Q000379:methods*; D019015:Geologic Sediments / Q000737:chemistry*; D010758:Phosphorus / Q000032:analysis*; D045483:Rivers / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D014874:Water Pollutants, Chemical; D010758:Phosphorus