Nutrient budgets in the Piratininga-Itaipu lagoon system (southeastern Brazil): effects of sea-exchange management

The Piratininga-Itaipu Lagoon System and its drainage basin, located on the southeastern coast of Brazil, Niterói (RJ), has been the target of an intense process of urbanization over the last four decades. As a result of this process, both the lagoon and the adjacent sea area have shown signs of eut...

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Autores principales:	Cerda,Mauricio, Nunes-Barboza,Conceição Denise, Nunes Scali-Carvalho,Camila, de Andrade-Jandre,Kelly, Marques Jr,Aguinaldo-Nepomuceno
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2013
Materias:	nutrient balance DIP DIN LOICZ Piratininga-Itaipu Brazil
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2013000200003
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spelling	oai:scielo:S0718-560X20130002000032013-08-13Nutrient budgets in the Piratininga-Itaipu lagoon system (southeastern Brazil): effects of sea-exchange managementCerda,MauricioNunes-Barboza,Conceição DeniseNunes Scali-Carvalho,Camilade Andrade-Jandre,KellyMarques Jr,Aguinaldo-Nepomuceno nutrient balance DIP DIN LOICZ Piratininga-Itaipu Brazil The Piratininga-Itaipu Lagoon System and its drainage basin, located on the southeastern coast of Brazil, Niterói (RJ), has been the target of an intense process of urbanization over the last four decades. As a result of this process, both the lagoon and the adjacent sea area have shown signs of eutrophication due to the release of large quantities of domestic sewage semi (or not) treated. In an attempt to minimize these effects, in 2008 the government re-established a connection between the Piratininga lagoon and the sea. To evaluate changes and variations in the balance of dissolved inorganic nutrients, before and after interventions, the geochemical model of two stoichiometric mass balance boxes of the "LOICZ Program" (Land-Ocean Interactions in the Coastal Zone) was used. The salt and water balance showed different water residence times in the Piratininga lagoon for the two periods: 2005-2006 (before the opening of the connection between the Piratininga lagoon and the sea) and 2009-2010 (after the opening of the connection with the sea). The first period showed a value about two times higher than that obtained for 2009-2010, τ = 83 and 39 days respectively. The water residence time of the Itaipu lagoon did not show great variations between the two periods (τ = 9 and 8 days). For the period of 2005-2006, before the opening of the connection with the sea, both the lagoons were autotrophic (ΔDIP > 0) and nitrogen loss was predominant (ΔDIN < 0). The second period (2009-2010) was characterized by changes only in the trophic state of the Piratininga lagoon, which became heterotrophic (ΔDIP > 0).info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.41 n.2 20132013-04-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2013000200003en10.3856/vol41-issue2-fulltext-3
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	nutrient balance DIP DIN LOICZ Piratininga-Itaipu Brazil
spellingShingle	nutrient balance DIP DIN LOICZ Piratininga-Itaipu Brazil Cerda,Mauricio Nunes-Barboza,Conceição Denise Nunes Scali-Carvalho,Camila de Andrade-Jandre,Kelly Marques Jr,Aguinaldo-Nepomuceno Nutrient budgets in the Piratininga-Itaipu lagoon system (southeastern Brazil): effects of sea-exchange management
description	The Piratininga-Itaipu Lagoon System and its drainage basin, located on the southeastern coast of Brazil, Niterói (RJ), has been the target of an intense process of urbanization over the last four decades. As a result of this process, both the lagoon and the adjacent sea area have shown signs of eutrophication due to the release of large quantities of domestic sewage semi (or not) treated. In an attempt to minimize these effects, in 2008 the government re-established a connection between the Piratininga lagoon and the sea. To evaluate changes and variations in the balance of dissolved inorganic nutrients, before and after interventions, the geochemical model of two stoichiometric mass balance boxes of the "LOICZ Program" (Land-Ocean Interactions in the Coastal Zone) was used. The salt and water balance showed different water residence times in the Piratininga lagoon for the two periods: 2005-2006 (before the opening of the connection between the Piratininga lagoon and the sea) and 2009-2010 (after the opening of the connection with the sea). The first period showed a value about two times higher than that obtained for 2009-2010, τ = 83 and 39 days respectively. The water residence time of the Itaipu lagoon did not show great variations between the two periods (τ = 9 and 8 days). For the period of 2005-2006, before the opening of the connection with the sea, both the lagoons were autotrophic (ΔDIP > 0) and nitrogen loss was predominant (ΔDIN < 0). The second period (2009-2010) was characterized by changes only in the trophic state of the Piratininga lagoon, which became heterotrophic (ΔDIP > 0).
author	Cerda,Mauricio Nunes-Barboza,Conceição Denise Nunes Scali-Carvalho,Camila de Andrade-Jandre,Kelly Marques Jr,Aguinaldo-Nepomuceno
author_facet	Cerda,Mauricio Nunes-Barboza,Conceição Denise Nunes Scali-Carvalho,Camila de Andrade-Jandre,Kelly Marques Jr,Aguinaldo-Nepomuceno
author_sort	Cerda,Mauricio
title	Nutrient budgets in the Piratininga-Itaipu lagoon system (southeastern Brazil): effects of sea-exchange management
title_short	Nutrient budgets in the Piratininga-Itaipu lagoon system (southeastern Brazil): effects of sea-exchange management
title_full	Nutrient budgets in the Piratininga-Itaipu lagoon system (southeastern Brazil): effects of sea-exchange management
title_fullStr	Nutrient budgets in the Piratininga-Itaipu lagoon system (southeastern Brazil): effects of sea-exchange management
title_full_unstemmed	Nutrient budgets in the Piratininga-Itaipu lagoon system (southeastern Brazil): effects of sea-exchange management
title_sort	nutrient budgets in the piratininga-itaipu lagoon system (southeastern brazil): effects of sea-exchange management
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2013
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2013000200003
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_version_	1714205106734366720

Nutrient budgets in the Piratininga-Itaipu lagoon system (southeastern Brazil): effects of sea-exchange management

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