Regime shifts of Cruces River wetland ecosystem: current conditions, future uncertainties

During April-May 2004 the Cruces River wetland ecosystem, located in Valdivia (40°S), southern Chile, was described as shifting from a clear water regime, dominated by the exotic macrophyte Egeria densa, to turbid waters and absence of submerged macrophytes. We analyzed the trophic status and ecolog...

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Autores principales: Marín,Víctor H, Delgado,Luisa E, Vila,Irma, Tironi,Antonio, Barrera,Vilma, Ibáñez,Carlos
Lenguaje:English
Publicado: Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2014
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Acceso en línea:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2014000100013
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spelling oai:scielo:S0718-560X20140001000132014-04-23Regime shifts of Cruces River wetland ecosystem: current conditions, future uncertaintiesMarín,Víctor HDelgado,Luisa EVila,IrmaTironi,AntonioBarrera,VilmaIbáñez,Carlos regime shift macrophytes nutrients eutrophication wetland ecosystem southern Chile During April-May 2004 the Cruces River wetland ecosystem, located in Valdivia (40°S), southern Chile, was described as shifting from a clear water regime, dominated by the exotic macrophyte Egeria densa, to turbid waters and absence of submerged macrophytes. We analyzed the trophic status and ecological regime of the wetland from November 2011 through January 2013. The trophic status was determined comparing values of selected variables (nutrients, chlorophyll-a and transparency) with OECD criteria. The ecological regime was determined comparing the same variables with the criteria proposed by Ibelings et al. (2007). We further compared the concentration of nutrients and suspended solids with previous measurements. Current trophic status of the wetland is between eutrophic and hypereutrophic, as shown by results, and its ecological regime intermediate, between clear and turbid waters, with a considerable risk of returning to turbid waters. In this article we discuss the potential relationship between the watershed land use (agriculture, cattle feeding and forestry), the change in wetland's trophic level and future conditions.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.42 n.1 20142014-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2014000100013en103856/vol42-issue1-fulltext-13
institution Scielo Chile
collection Scielo Chile
language English
topic regime shift
macrophytes
nutrients
eutrophication
wetland
ecosystem
southern Chile
spellingShingle regime shift
macrophytes
nutrients
eutrophication
wetland
ecosystem
southern Chile
Marín,Víctor H
Delgado,Luisa E
Vila,Irma
Tironi,Antonio
Barrera,Vilma
Ibáñez,Carlos
Regime shifts of Cruces River wetland ecosystem: current conditions, future uncertainties
description During April-May 2004 the Cruces River wetland ecosystem, located in Valdivia (40°S), southern Chile, was described as shifting from a clear water regime, dominated by the exotic macrophyte Egeria densa, to turbid waters and absence of submerged macrophytes. We analyzed the trophic status and ecological regime of the wetland from November 2011 through January 2013. The trophic status was determined comparing values of selected variables (nutrients, chlorophyll-a and transparency) with OECD criteria. The ecological regime was determined comparing the same variables with the criteria proposed by Ibelings et al. (2007). We further compared the concentration of nutrients and suspended solids with previous measurements. Current trophic status of the wetland is between eutrophic and hypereutrophic, as shown by results, and its ecological regime intermediate, between clear and turbid waters, with a considerable risk of returning to turbid waters. In this article we discuss the potential relationship between the watershed land use (agriculture, cattle feeding and forestry), the change in wetland's trophic level and future conditions.
author Marín,Víctor H
Delgado,Luisa E
Vila,Irma
Tironi,Antonio
Barrera,Vilma
Ibáñez,Carlos
author_facet Marín,Víctor H
Delgado,Luisa E
Vila,Irma
Tironi,Antonio
Barrera,Vilma
Ibáñez,Carlos
author_sort Marín,Víctor H
title Regime shifts of Cruces River wetland ecosystem: current conditions, future uncertainties
title_short Regime shifts of Cruces River wetland ecosystem: current conditions, future uncertainties
title_full Regime shifts of Cruces River wetland ecosystem: current conditions, future uncertainties
title_fullStr Regime shifts of Cruces River wetland ecosystem: current conditions, future uncertainties
title_full_unstemmed Regime shifts of Cruces River wetland ecosystem: current conditions, future uncertainties
title_sort regime shifts of cruces river wetland ecosystem: current conditions, future uncertainties
publisher Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate 2014
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2014000100013
work_keys_str_mv AT marinvictorh regimeshiftsofcrucesriverwetlandecosystemcurrentconditionsfutureuncertainties
AT delgadoluisae regimeshiftsofcrucesriverwetlandecosystemcurrentconditionsfutureuncertainties
AT vilairma regimeshiftsofcrucesriverwetlandecosystemcurrentconditionsfutureuncertainties
AT tironiantonio regimeshiftsofcrucesriverwetlandecosystemcurrentconditionsfutureuncertainties
AT barreravilma regimeshiftsofcrucesriverwetlandecosystemcurrentconditionsfutureuncertainties
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