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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todo:paper_00188158_v511_n_p25_Izaguirre2023-10-03T14:15:57Z Algal assemblages across a wetland, from a shallow lake to relictual oxbow lakes (Lower Paraná River, South America) Izaguirre, I. O'Farrell, I. Unrein, F. Sinistro, R. Afonso, M.D.S. Tell, G. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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, I. O'Farrell, I. Unrein, F. Sinistro, R. Afonso, M.D.S. Tell, G. 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. |
format |
JOUR |
author |
Izaguirre, I. O'Farrell, I. Unrein, F. Sinistro, R. Afonso, M.D.S. Tell, G. |
author_facet |
Izaguirre, I. O'Farrell, I. Unrein, F. Sinistro, R. Afonso, M.D.S. Tell, G. |
author_sort |
Izaguirre, I. |
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) |
url |
http://hdl.handle.net/20.500.12110/paper_00188158_v511_n_p25_Izaguirre |
work_keys_str_mv |
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