Stability of diatom composition in a variable lake environment: Lake Chascomús, Argentina
Water and surficial sediment samples of Lake Chascomús and its tributaries were analyzed in order to relate changes in diatom community structure to chemical variables. Over the course of 13 months of sampling, the lake exhibited major changes in water level (1.15-1.98m average depth), total dissolv...
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2002
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14398621_v3_n2_p77_Miretzky http://hdl.handle.net/20.500.12110/paper_14398621_v3_n2_p77_Miretzky |
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paper:paper_14398621_v3_n2_p77_Miretzky2023-06-08T16:16:03Z Stability of diatom composition in a variable lake environment: Lake Chascomús, Argentina Miretzky, Patricia S. Maidana, Nora Irene Fernández Cirelli, Alicia Chascomús Diatoms Hydrochemical composition Pampa lake Plankton community composition community structure diatom lacustrine deposit lake ecosystem Argentina algae Bacillariophyta Fragilaria Staurosira construens Synedra Synedra berolinensis Water and surficial sediment samples of Lake Chascomús and its tributaries were analyzed in order to relate changes in diatom community structure to chemical variables. Over the course of 13 months of sampling, the lake exhibited major changes in water level (1.15-1.98m average depth), total dissolved solids (821-1972 mg1-1), silica (0.098-8.22 mg1-1), and total algal biomass (21.4-145.9 μg Ch1 a 1-1). However, despite these large fluctuations, the diatom species composition was relatively stable. The dominant species in the water column was always Synedra berolinensis (68.9%-90.1% total frustules), with Fragilaria construens and F. brevistriata as subdominants. In the sediments the latter two species dominated the frustule counts. These results indicate an unusual floristic stability of this eutrophic ecosystem, with persistent dominance by broadly tolerant, generalist species. Fil:Miretzky, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Maidana, N.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Fernández Cirelli, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2002 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14398621_v3_n2_p77_Miretzky http://hdl.handle.net/20.500.12110/paper_14398621_v3_n2_p77_Miretzky |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Chascomús Diatoms Hydrochemical composition Pampa lake Plankton community composition community structure diatom lacustrine deposit lake ecosystem Argentina algae Bacillariophyta Fragilaria Staurosira construens Synedra Synedra berolinensis |
| spellingShingle |
Chascomús Diatoms Hydrochemical composition Pampa lake Plankton community composition community structure diatom lacustrine deposit lake ecosystem Argentina algae Bacillariophyta Fragilaria Staurosira construens Synedra Synedra berolinensis Miretzky, Patricia S. Maidana, Nora Irene Fernández Cirelli, Alicia Stability of diatom composition in a variable lake environment: Lake Chascomús, Argentina |
| topic_facet |
Chascomús Diatoms Hydrochemical composition Pampa lake Plankton community composition community structure diatom lacustrine deposit lake ecosystem Argentina algae Bacillariophyta Fragilaria Staurosira construens Synedra Synedra berolinensis |
| description |
Water and surficial sediment samples of Lake Chascomús and its tributaries were analyzed in order to relate changes in diatom community structure to chemical variables. Over the course of 13 months of sampling, the lake exhibited major changes in water level (1.15-1.98m average depth), total dissolved solids (821-1972 mg1-1), silica (0.098-8.22 mg1-1), and total algal biomass (21.4-145.9 μg Ch1 a 1-1). However, despite these large fluctuations, the diatom species composition was relatively stable. The dominant species in the water column was always Synedra berolinensis (68.9%-90.1% total frustules), with Fragilaria construens and F. brevistriata as subdominants. In the sediments the latter two species dominated the frustule counts. These results indicate an unusual floristic stability of this eutrophic ecosystem, with persistent dominance by broadly tolerant, generalist species. |
| author |
Miretzky, Patricia S. Maidana, Nora Irene Fernández Cirelli, Alicia |
| author_facet |
Miretzky, Patricia S. Maidana, Nora Irene Fernández Cirelli, Alicia |
| author_sort |
Miretzky, Patricia S. |
| title |
Stability of diatom composition in a variable lake environment: Lake Chascomús, Argentina |
| title_short |
Stability of diatom composition in a variable lake environment: Lake Chascomús, Argentina |
| title_full |
Stability of diatom composition in a variable lake environment: Lake Chascomús, Argentina |
| title_fullStr |
Stability of diatom composition in a variable lake environment: Lake Chascomús, Argentina |
| title_full_unstemmed |
Stability of diatom composition in a variable lake environment: Lake Chascomús, Argentina |
| title_sort |
stability of diatom composition in a variable lake environment: lake chascomús, argentina |
| publishDate |
2002 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14398621_v3_n2_p77_Miretzky http://hdl.handle.net/20.500.12110/paper_14398621_v3_n2_p77_Miretzky |
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AT miretzkypatricias stabilityofdiatomcompositioninavariablelakeenvironmentlakechascomusargentina AT maidananorairene stabilityofdiatomcompositioninavariablelakeenvironmentlakechascomusargentina AT fernandezcirellialicia stabilityofdiatomcompositioninavariablelakeenvironmentlakechascomusargentina |
| _version_ |
1768542955014979584 |