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Abstract:

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.

Registro:

Documento: Artículo
Título:Algal assemblages across a wetland, from a shallow lake to relictual oxbow lakes (Lower Paraná River, South America)
Autor:Izaguirre, I.; O'Farrell, I.; Unrein, F.; Sinistro, R.; Afonso, M.D.S.; Tell, G.
Filiación:Depto. de Ecologia, Genet. y Evol., Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, C1428EHA, Buenos Aires, Argentina
INQUIMAE, Depto. Quim. Inorg., Analitica Q., C1428EHA, Buenos Aires, Argentina
Palabras clave: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)
Año:2004
Volumen:511
Página de inicio:25
Página de fin:36
DOI: http://dx.doi.org/10.1023/B:HYDR.0000014016.89127.ca
Título revista:Hydrobiologia
Título revista abreviado:Hydrobiologia
ISSN:00188158
CODEN:HYDRB
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00188158_v511_n_p25_Izaguirre

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Citas:

---------- APA ----------
Izaguirre, I., O'Farrell, I., Unrein, F., Sinistro, R., Afonso, M.D.S. & Tell, G. (2004) . Algal assemblages across a wetland, from a shallow lake to relictual oxbow lakes (Lower Paraná River, South America). Hydrobiologia, 511, 25-36.
http://dx.doi.org/10.1023/B:HYDR.0000014016.89127.ca
---------- CHICAGO ----------
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)" . Hydrobiologia 511 (2004) : 25-36.
http://dx.doi.org/10.1023/B:HYDR.0000014016.89127.ca
---------- MLA ----------
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)" . Hydrobiologia, vol. 511, 2004, pp. 25-36.
http://dx.doi.org/10.1023/B:HYDR.0000014016.89127.ca
---------- VANCOUVER ----------
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). Hydrobiologia. 2004;511:25-36.
http://dx.doi.org/10.1023/B:HYDR.0000014016.89127.ca