Drivers shaping phytoplankton diversity and composition in a humid Pampean floodplain lake (Natural Reserve)

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We aimed to identify the driver/s of phytoplankton diversity (gamma, beta, alpha) and community composition in a Pampean floodplain wetland (Otamendi), using species and functional groups. We performed a seasonal regional survey (2004-2006, phytoplankton regime) across the different aquatic systems...

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Autores principales: de Tezanos Pinto, P., Lombardo, R., O'Farrell, I., Izaguirre, I.
Formato: INPR
Materias:
Diversity
Free-floating plants
Functional groups
Phytoplankton
Wetland
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00188158_v_n_p_deTezanosPinto
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00188158_v_n_p_deTezanosPinto
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spelling todo:paper_00188158_v_n_p_deTezanosPinto2023-10-03T14:16:16Z Drivers shaping phytoplankton diversity and composition in a humid Pampean floodplain lake (Natural Reserve) de Tezanos Pinto, P. Lombardo, R. O'Farrell, I. Izaguirre, I. Diversity Free-floating plants Functional groups Phytoplankton Wetland We aimed to identify the driver/s of phytoplankton diversity (gamma, beta, alpha) and community composition in a Pampean floodplain wetland (Otamendi), using species and functional groups. We performed a seasonal regional survey (2004-2006, phytoplankton regime) across the different aquatic systems in the wetland. Gamma diversity was 254 species. Beta diversity was 2.53 in late spring, 2.49 in winter, and was lowest in summer (2.05) when the wetland was over flooded. Alpha diversity (mean richness) ranged between 29 and 50 species. Multiple regressions showed that phytoplankton alpha diversity (richness, Shannon-Wiener, evenness, and Simpson diversity index) responded to dissolved inorganic nitrogen, suspended solids, light attenuation, and pH. Nutrients also explained well the distribution of phytoplankton functional groups. Dissolved inorganic nitrogen concentrations were usually limiting in the shallow lakes, whereas phosphate concentration was always high. Light attenuation was mostly caused by high suspended solids and high humic substances. We also re-analyzed data from a survey performed during a free-floating plant regime (1998-2000); the dense macrophyte cover attenuates most incoming light into the water column. Compared with the phytoplankton regime, the free-floating plant regime had markedly lower chlorophyll, lower alpha, higher beta (high heterogeneity among habitats with and without macrophytes), and similar gamma diversity. © 2014 Springer International Publishing Switzerland. Fil:de Tezanos Pinto, P. 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:Izaguirre, I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. INPR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00188158_v_n_p_deTezanosPinto
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Diversity
Free-floating plants
Functional groups
Phytoplankton
Wetland
spellingShingle Diversity
Free-floating plants
Functional groups
Phytoplankton
Wetland
de Tezanos Pinto, P.
Lombardo, R.
O'Farrell, I.
Izaguirre, I.
Drivers shaping phytoplankton diversity and composition in a humid Pampean floodplain lake (Natural Reserve)
topic_facet Diversity
Free-floating plants
Functional groups
Phytoplankton
Wetland
description We aimed to identify the driver/s of phytoplankton diversity (gamma, beta, alpha) and community composition in a Pampean floodplain wetland (Otamendi), using species and functional groups. We performed a seasonal regional survey (2004-2006, phytoplankton regime) across the different aquatic systems in the wetland. Gamma diversity was 254 species. Beta diversity was 2.53 in late spring, 2.49 in winter, and was lowest in summer (2.05) when the wetland was over flooded. Alpha diversity (mean richness) ranged between 29 and 50 species. Multiple regressions showed that phytoplankton alpha diversity (richness, Shannon-Wiener, evenness, and Simpson diversity index) responded to dissolved inorganic nitrogen, suspended solids, light attenuation, and pH. Nutrients also explained well the distribution of phytoplankton functional groups. Dissolved inorganic nitrogen concentrations were usually limiting in the shallow lakes, whereas phosphate concentration was always high. Light attenuation was mostly caused by high suspended solids and high humic substances. We also re-analyzed data from a survey performed during a free-floating plant regime (1998-2000); the dense macrophyte cover attenuates most incoming light into the water column. Compared with the phytoplankton regime, the free-floating plant regime had markedly lower chlorophyll, lower alpha, higher beta (high heterogeneity among habitats with and without macrophytes), and similar gamma diversity. © 2014 Springer International Publishing Switzerland.
format INPR
author de Tezanos Pinto, P.
Lombardo, R.
O'Farrell, I.
Izaguirre, I.
author_facet de Tezanos Pinto, P.
Lombardo, R.
O'Farrell, I.
Izaguirre, I.
author_sort de Tezanos Pinto, P.
title Drivers shaping phytoplankton diversity and composition in a humid Pampean floodplain lake (Natural Reserve)
title_short Drivers shaping phytoplankton diversity and composition in a humid Pampean floodplain lake (Natural Reserve)
title_full Drivers shaping phytoplankton diversity and composition in a humid Pampean floodplain lake (Natural Reserve)
title_fullStr Drivers shaping phytoplankton diversity and composition in a humid Pampean floodplain lake (Natural Reserve)
title_full_unstemmed Drivers shaping phytoplankton diversity and composition in a humid Pampean floodplain lake (Natural Reserve)
title_sort drivers shaping phytoplankton diversity and composition in a humid pampean floodplain lake (natural reserve)
url http://hdl.handle.net/20.500.12110/paper_00188158_v_n_p_deTezanosPinto
work_keys_str_mv AT detezanospintop driversshapingphytoplanktondiversityandcompositioninahumidpampeanfloodplainlakenaturalreserve
AT lombardor driversshapingphytoplanktondiversityandcompositioninahumidpampeanfloodplainlakenaturalreserve
AT ofarrelli driversshapingphytoplanktondiversityandcompositioninahumidpampeanfloodplainlakenaturalreserve
AT izaguirrei driversshapingphytoplanktondiversityandcompositioninahumidpampeanfloodplainlakenaturalreserve
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