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Abstract:

We analyzed experimentally the relative contribution of phytoplankton and periphyton in two shallow lakes from the Pampa Plain (Argentina) that represent opposite scenarios according to the alternative states hypothesis for shallow lakes: a clear lake with submerged macrophytes, and a turbid lake with high phytoplankton biomass. To study the temporal changes of both microalgal communities under such contrasting conditions, we placed enclosures in the littoral zone of each lake, including natural phytoplankton and artificial substrata, half previously colonized by periphyton until a mature stage and half clean to analyze periphyton colonization. In the clear vegetated shallow lake, periphyton chlorophyll a concentrations were 3-6 times higher than those of the phytoplankton community. In contrast, phytoplankton chlorophyll a concentrations were 76-1,325 times higher than those of periphyton in the turbid lake. Here, under light limitation conditions, the colonization of the periphyton was significantly lower than in the clear lake. Our results indicate that in turbid shallow lakes, the light limitation caused by phytoplankton determines a low periphyton biomass dominated by heterotrophic components. In clear vegetated shallow lakes, where nitrogen limitation probably occurs, periphyton may develop higher biomass, most likely due to their higher efficiency in nutrient recycling. © Springer Science+Business Media B.V. 2010.

Registro:

Documento: Artículo
Título:Relative importance of periphyton and phytoplankton in turbid and clear vegetated shallow lakes from the Pampa Plain (Argentina): A comparative experimental study
Autor:Sánchez, M.L.; Pizarro, H.; Tell, G.; Izaguirre, I.
Filiación:Depto. Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
Consejo Nacional de Investigación Científica y Técnica (CONICET), Buenos Aires, Argentina
Palabras clave:Alternative states; Artificial substrata; Benthic biomass; Enclosures; Pelagic biomass; South America; Alternative state; Argentina; Artificial substrata; Benthic biomass; Chlorophyll-a concentration; Experimental studies; Higher efficiency; Littoral zone; Nitrogen limitation; Nutrient recycling; Periphytons; Phytoplankton biomass; Phytoplankton chlorophyll; Phytoplankton community; Relative contribution; Relative importance; Shallow lakes; South America; Submerged macrophytes; Temporal change; Turbid lakes; Algae control; Biomass; Chlorophyll; Enclosures; Phytoplankton; Porphyrins; Lakes; artificial substrate; benthos; chlorophyll; colonization; enclosure experiment; heterotrophy; lake ecosystem; macrophyte; nitrogen; nutrient cycling; pelagic ecosystem; periphyton; phytomass; phytoplankton; submerged vegetation; turbidity; Argentina; Pampas
Año:2010
Volumen:646
Número:1
Página de inicio:271
Página de fin:280
DOI: http://dx.doi.org/10.1007/s10750-010-0181-3
Título revista:Hydrobiologia
Título revista abreviado:Hydrobiologia
ISSN:00188158
CODEN:HYDRB
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00188158_v646_n1_p271_Sanchez

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Citas:

---------- APA ----------
Sánchez, M.L., Pizarro, H., Tell, G. & Izaguirre, I. (2010) . Relative importance of periphyton and phytoplankton in turbid and clear vegetated shallow lakes from the Pampa Plain (Argentina): A comparative experimental study. Hydrobiologia, 646(1), 271-280.
http://dx.doi.org/10.1007/s10750-010-0181-3
---------- CHICAGO ----------
Sánchez, M.L., Pizarro, H., Tell, G., Izaguirre, I. "Relative importance of periphyton and phytoplankton in turbid and clear vegetated shallow lakes from the Pampa Plain (Argentina): A comparative experimental study" . Hydrobiologia 646, no. 1 (2010) : 271-280.
http://dx.doi.org/10.1007/s10750-010-0181-3
---------- MLA ----------
Sánchez, M.L., Pizarro, H., Tell, G., Izaguirre, I. "Relative importance of periphyton and phytoplankton in turbid and clear vegetated shallow lakes from the Pampa Plain (Argentina): A comparative experimental study" . Hydrobiologia, vol. 646, no. 1, 2010, pp. 271-280.
http://dx.doi.org/10.1007/s10750-010-0181-3
---------- VANCOUVER ----------
Sánchez, M.L., Pizarro, H., Tell, G., Izaguirre, I. Relative importance of periphyton and phytoplankton in turbid and clear vegetated shallow lakes from the Pampa Plain (Argentina): A comparative experimental study. Hydrobiologia. 2010;646(1):271-280.
http://dx.doi.org/10.1007/s10750-010-0181-3