Size fractionated phytoplankton production in two humic shallow lakes with contrasting coverage of free floating plants

We conducted a 1-year survey in two humic shallow lakes from the floodplain of the Lower Paraná River, Laguna Grande Lake (LGL) and a relictual oxbow lake (ROL). We aimed to test two hypotheses: (1) the efficiency in light use of picoplankton (0. 2-3 μm) is greater as light restriction increases and...

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Autores principales: Rodríguez, Patricia Laura, Pizarro, Haydee Norma, Vera, María Solange
Publicado: 2012
Materias:
Humic shallow lakes
Pico-, nano- and microphytoplankton
Productivity
South America
Subtropical wetland
biomass
carbon isotope
dominance
floodplain
fractionation
humic substance
photosynthesis
phytoplankton
picoplankton
primary production
seasonality
shallow water
size structure
subtropical region
wetland
Parana River
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00188158_v691_n1_p285_Rodriguez
http://hdl.handle.net/20.500.12110/paper_00188158_v691_n1_p285_Rodriguez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00188158_v691_n1_p285_Rodriguez
record_format dspace
spelling paper:paper_00188158_v691_n1_p285_Rodriguez2023-06-08T14:39:55Z Size fractionated phytoplankton production in two humic shallow lakes with contrasting coverage of free floating plants Rodríguez, Patricia Laura Pizarro, Haydee Norma Vera, María Solange Humic shallow lakes Pico-, nano- and microphytoplankton Productivity South America Subtropical wetland biomass carbon isotope dominance floodplain fractionation humic substance photosynthesis phytoplankton picoplankton primary production seasonality shallow water size structure subtropical region wetland Parana River We conducted a 1-year survey in two humic shallow lakes from the floodplain of the Lower Paraná River, Laguna Grande Lake (LGL) and a relictual oxbow lake (ROL). We aimed to test two hypotheses: (1) the efficiency in light use of picoplankton (0. 2-3 μm) is greater as light restriction increases and (2) the contribution of picoplankton to the total productivity is higher when the total photosynthetic biomass is lower. We performed P-E curves for picoplankton and nano- and microplankton (>3 μm) using the 14C assimilation technique. The light environments of the water bodies differed mainly owing to the development of free floating plants on the surface of the ROL and the dominance of phytoplankton in LGL. Primary productivity patterns in LGL were seasonality driven whilst in the ROL they were related to the coverage of floating macrophytes, which promoted light limitation and a lower productivity. In LGL, nano- and microplankton were in general more productive and the relative contribution of picoplankton to the total phytoplankton production decreased with the increase in total photosynthetic biomass. Hence, our study extends previously observed patterns to subtropical shallow lakes, where seasonality and free floating plants may influence the dynamics of phytoplankton production. © 2012 Springer Science+Business Media B.V. Fil:Rodríguez, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pizarro, H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vera, M.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00188158_v691_n1_p285_Rodriguez http://hdl.handle.net/20.500.12110/paper_00188158_v691_n1_p285_Rodriguez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Humic shallow lakes
Pico-, nano- and microphytoplankton
Productivity
South America
Subtropical wetland
biomass
carbon isotope
dominance
floodplain
fractionation
humic substance
photosynthesis
phytoplankton
picoplankton
primary production
seasonality
shallow water
size structure
subtropical region
wetland
Parana River
spellingShingle Humic shallow lakes
Pico-, nano- and microphytoplankton
Productivity
South America
Subtropical wetland
biomass
carbon isotope
dominance
floodplain
fractionation
humic substance
photosynthesis
phytoplankton
picoplankton
primary production
seasonality
shallow water
size structure
subtropical region
wetland
Parana River
Rodríguez, Patricia Laura
Pizarro, Haydee Norma
Vera, María Solange
Size fractionated phytoplankton production in two humic shallow lakes with contrasting coverage of free floating plants
topic_facet Humic shallow lakes
Pico-, nano- and microphytoplankton
Productivity
South America
Subtropical wetland
biomass
carbon isotope
dominance
floodplain
fractionation
humic substance
photosynthesis
phytoplankton
picoplankton
primary production
seasonality
shallow water
size structure
subtropical region
wetland
Parana River
description We conducted a 1-year survey in two humic shallow lakes from the floodplain of the Lower Paraná River, Laguna Grande Lake (LGL) and a relictual oxbow lake (ROL). We aimed to test two hypotheses: (1) the efficiency in light use of picoplankton (0. 2-3 μm) is greater as light restriction increases and (2) the contribution of picoplankton to the total productivity is higher when the total photosynthetic biomass is lower. We performed P-E curves for picoplankton and nano- and microplankton (>3 μm) using the 14C assimilation technique. The light environments of the water bodies differed mainly owing to the development of free floating plants on the surface of the ROL and the dominance of phytoplankton in LGL. Primary productivity patterns in LGL were seasonality driven whilst in the ROL they were related to the coverage of floating macrophytes, which promoted light limitation and a lower productivity. In LGL, nano- and microplankton were in general more productive and the relative contribution of picoplankton to the total phytoplankton production decreased with the increase in total photosynthetic biomass. Hence, our study extends previously observed patterns to subtropical shallow lakes, where seasonality and free floating plants may influence the dynamics of phytoplankton production. © 2012 Springer Science+Business Media B.V.
author Rodríguez, Patricia Laura
Pizarro, Haydee Norma
Vera, María Solange
author_facet Rodríguez, Patricia Laura
Pizarro, Haydee Norma
Vera, María Solange
author_sort Rodríguez, Patricia Laura
title Size fractionated phytoplankton production in two humic shallow lakes with contrasting coverage of free floating plants
title_short Size fractionated phytoplankton production in two humic shallow lakes with contrasting coverage of free floating plants
title_full Size fractionated phytoplankton production in two humic shallow lakes with contrasting coverage of free floating plants
title_fullStr Size fractionated phytoplankton production in two humic shallow lakes with contrasting coverage of free floating plants
title_full_unstemmed Size fractionated phytoplankton production in two humic shallow lakes with contrasting coverage of free floating plants
title_sort size fractionated phytoplankton production in two humic shallow lakes with contrasting coverage of free floating plants
publishDate 2012
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00188158_v691_n1_p285_Rodriguez
http://hdl.handle.net/20.500.12110/paper_00188158_v691_n1_p285_Rodriguez
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