Algal assemblages across a wetland, from a shallow lake to relictual oxbow lakes (Lower Paraná River, South America)

This study deals with the variation in the algal assemblages across the transversal dimension of a wetland of the Lower Paraná River from October 1998 to September 1999. The relationship between the algal composition and the physico-chemical variables is analyzed by means of Canonical Correspondence...

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Autores principales: Izaguirre, Irina, O'Farrell, Inés, Unrein, Fernando, Sinistro, Rodrigo
Publicado: 2004
Materias:
Algal assemblages
CCA
Paraná River floodplain
Biodiversity
Composition
Lakes
Rivers
Wetlands
Shallow lake
Algae
algal community
correspondence analysis
lake
oxbow lake
physicochemical property
Parana River
South America
algae
Bacillariophyta
Chlorophyta
Cryptophyta
Cyanobacteria
Dinophyceae
Euglenida
Eukaryota
Mastigophora (flagellates)
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00188158_v511_n_p25_Izaguirre
http://hdl.handle.net/20.500.12110/paper_00188158_v511_n_p25_Izaguirre
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00188158_v511_n_p25_Izaguirre
record_format dspace
spelling paper:paper_00188158_v511_n_p25_Izaguirre2023-06-08T14:39:49Z Algal assemblages across a wetland, from a shallow lake to relictual oxbow lakes (Lower Paraná River, South America) Izaguirre, Irina O'Farrell, Inés Unrein, Fernando Sinistro, Rodrigo Algal assemblages CCA Paraná River floodplain Biodiversity Composition Lakes Rivers Wetlands Shallow lake Algae algal community correspondence analysis lake oxbow lake physicochemical property Parana River South America algae Bacillariophyta Chlorophyta Cryptophyta Cyanobacteria Dinophyceae Euglenida Eukaryota Mastigophora (flagellates) This study deals with the variation in the algal assemblages across the transversal dimension of a wetland of the Lower Paraná River from October 1998 to September 1999. The relationship between the algal composition and the physico-chemical variables is analyzed by means of Canonical Correspondence Analysis. The abundant floating macrophytes generated a severe reduction in light penetration in the relictual oxbow lakes (ROLs), almost anoxic conditions and high values of P, N and K. Such characteristics accounted for their very particular algal flora dominated by Cyanobacteria and several diatoms, species probably mixotrophic regarding their capacity to grow in darkness and tolerate very low oxygen contents. In the shallow lake, the phytoplankton comprised many small autotrophic green algae, accompanied by many flagellates of the classes Cryptophyceae, Euglenophyceae and Dinophyceae. Our results indicate that the macrophyte cover was probably the stirring factor in the selection of algal species along the transitional zone comprising a floodplain shallow lake and several ROLs. Fil:Izaguirre, I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:O'Farrell, I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Unrein, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Sinistro, R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2004 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00188158_v511_n_p25_Izaguirre http://hdl.handle.net/20.500.12110/paper_00188158_v511_n_p25_Izaguirre
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Algal assemblages
CCA
Paraná River floodplain
Biodiversity
Composition
Lakes
Rivers
Wetlands
Shallow lake
Algae
algal community
correspondence analysis
lake
oxbow lake
physicochemical property
Parana River
South America
algae
Bacillariophyta
Chlorophyta
Cryptophyta
Cyanobacteria
Dinophyceae
Euglenida
Eukaryota
Mastigophora (flagellates)
spellingShingle Algal assemblages
CCA
Paraná River floodplain
Biodiversity
Composition
Lakes
Rivers
Wetlands
Shallow lake
Algae
algal community
correspondence analysis
lake
oxbow lake
physicochemical property
Parana River
South America
algae
Bacillariophyta
Chlorophyta
Cryptophyta
Cyanobacteria
Dinophyceae
Euglenida
Eukaryota
Mastigophora (flagellates)
Izaguirre, Irina
O'Farrell, Inés
Unrein, Fernando
Sinistro, Rodrigo
Algal assemblages across a wetland, from a shallow lake to relictual oxbow lakes (Lower Paraná River, South America)
topic_facet Algal assemblages
CCA
Paraná River floodplain
Biodiversity
Composition
Lakes
Rivers
Wetlands
Shallow lake
Algae
algal community
correspondence analysis
lake
oxbow lake
physicochemical property
Parana River
South America
algae
Bacillariophyta
Chlorophyta
Cryptophyta
Cyanobacteria
Dinophyceae
Euglenida
Eukaryota
Mastigophora (flagellates)
description This study deals with the variation in the algal assemblages across the transversal dimension of a wetland of the Lower Paraná River from October 1998 to September 1999. The relationship between the algal composition and the physico-chemical variables is analyzed by means of Canonical Correspondence Analysis. The abundant floating macrophytes generated a severe reduction in light penetration in the relictual oxbow lakes (ROLs), almost anoxic conditions and high values of P, N and K. Such characteristics accounted for their very particular algal flora dominated by Cyanobacteria and several diatoms, species probably mixotrophic regarding their capacity to grow in darkness and tolerate very low oxygen contents. In the shallow lake, the phytoplankton comprised many small autotrophic green algae, accompanied by many flagellates of the classes Cryptophyceae, Euglenophyceae and Dinophyceae. Our results indicate that the macrophyte cover was probably the stirring factor in the selection of algal species along the transitional zone comprising a floodplain shallow lake and several ROLs.
author Izaguirre, Irina
O'Farrell, Inés
Unrein, Fernando
Sinistro, Rodrigo
author_facet Izaguirre, Irina
O'Farrell, Inés
Unrein, Fernando
Sinistro, Rodrigo
author_sort Izaguirre, Irina
title Algal assemblages across a wetland, from a shallow lake to relictual oxbow lakes (Lower Paraná River, South America)
title_short Algal assemblages across a wetland, from a shallow lake to relictual oxbow lakes (Lower Paraná River, South America)
title_full Algal assemblages across a wetland, from a shallow lake to relictual oxbow lakes (Lower Paraná River, South America)
title_fullStr Algal assemblages across a wetland, from a shallow lake to relictual oxbow lakes (Lower Paraná River, South America)
title_full_unstemmed Algal assemblages across a wetland, from a shallow lake to relictual oxbow lakes (Lower Paraná River, South America)
title_sort algal assemblages across a wetland, from a shallow lake to relictual oxbow lakes (lower paraná river, south america)
publishDate 2004
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00188158_v511_n_p25_Izaguirre
http://hdl.handle.net/20.500.12110/paper_00188158_v511_n_p25_Izaguirre
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