Picoplankton structure in clear and turbid eutrophic shallow lakes: A seasonal study

The relative abundance of the different picoplankton components (eukaryotic picophytoplankton (Peuk), picocyanobacteria (Pcy) and bacterioplankton), and their relationships with the lake conditions were studied in three types of shallow lakes from the Pampa Plain (Argentina) that differ in their opt...

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Detalles Bibliográficos
Autores principales: Silvoso, Julieta E., Izaguirre, Irina, Allende, Luz
Publicado: 2011
Materias:
Eutrophic
Picoplankton
Seasonality
Shallow lakes
Turbidity
abundance
community structure
eutrophic environment
nitrogen
phosphorus
picoplankton
seasonality
size structure
turbidity
algae
Eukaryota
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00759511_v41_n3_p181_Silvoso
http://hdl.handle.net/20.500.12110/paper_00759511_v41_n3_p181_Silvoso
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00759511_v41_n3_p181_Silvoso
record_format dspace
spelling paper:paper_00759511_v41_n3_p181_Silvoso2023-06-08T15:07:13Z Picoplankton structure in clear and turbid eutrophic shallow lakes: A seasonal study Silvoso, Julieta E. Izaguirre, Irina Allende, Luz Eutrophic Picoplankton Seasonality Shallow lakes Turbidity abundance community structure eutrophic environment nitrogen phosphorus picoplankton seasonality size structure turbidity algae Eukaryota The relative abundance of the different picoplankton components (eukaryotic picophytoplankton (Peuk), picocyanobacteria (Pcy) and bacterioplankton), and their relationships with the lake conditions were studied in three types of shallow lakes from the Pampa Plain (Argentina) that differ in their optical properties: clear-vegetated, phytoplankton-turbid and inorganic-turbid. All the selected lakes, but one, are characterized by their different alternative steady state (clear-vegetated and phytoplankton-turbid water phases) following the model proposed by Scheffer et al. (1993).Autotrophic and heterotrophic picoplankton abundances were analyzed seasonally in relation to environmental variables. All the lakes presented high concentrations of total nitrogen (TN) (>229μgL-1), total phosphorus (TP) (>46μgL-1) and dissolved organic carbon (DOC) (>13.7mgL-1). Clear-vegetated lakes were characterized by vertical diffuse PAR (photosynthetic active radiation) attenuation coefficient (kdPAR) lower than 11m-1, whereas inorganic-turbid lake always showed values higher than 21.1m-1. The euphotic zone depth (Z1%) was wider in clear-vegetated lakes (40-140cm) and thinner in the inorganic-turbid (10-20cm). The phytoplankton-turbid lakes presented a wide range in the values of these variables (kdPAR: 5.2-35.8m-1; Z1%: 10-90cm). Phytoplankton chlorophyll-a (Chl-a) strongly differed, ranging from 1.6 to 334.6μgL-1. Picophytoplankton was mainly represented by phycocianine-rich (PC-rich) Pcy in all cases, dominating over Peuk algae. The total and relative abundances of eukaryotic picophytoplankton, Pcy and bacterioplankton, as well as the size structure of the phytoplankton community differed among the water bodies. In general, clear-vegetated water bodies exhibited similar abiotic characteristics, picophytoplankton/bacterioplankton ratios, and phytoplankton size structure. Contrarily, no clear trend was identified for the group of turbid lakes. The contrasting results obtained for the importance of the picoplankton components in phytoplankton-turbid shallow lakes evidence that the availability of the energetical and nutrient resources cannot be solely considered to predict their relative importance in this type of shallow lake. © 2010 Elsevier GmbH. Fil:Silvoso, J. 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. Fil:Allende, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00759511_v41_n3_p181_Silvoso http://hdl.handle.net/20.500.12110/paper_00759511_v41_n3_p181_Silvoso
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Eutrophic
Picoplankton
Seasonality
Shallow lakes
Turbidity
abundance
community structure
eutrophic environment
nitrogen
phosphorus
picoplankton
seasonality
size structure
turbidity
algae
Eukaryota
spellingShingle Eutrophic
Picoplankton
Seasonality
Shallow lakes
Turbidity
abundance
community structure
eutrophic environment
nitrogen
phosphorus
picoplankton
seasonality
size structure
turbidity
algae
Eukaryota
Silvoso, Julieta E.
Izaguirre, Irina
Allende, Luz
Picoplankton structure in clear and turbid eutrophic shallow lakes: A seasonal study
topic_facet Eutrophic
Picoplankton
Seasonality
Shallow lakes
Turbidity
abundance
community structure
eutrophic environment
nitrogen
phosphorus
picoplankton
seasonality
size structure
turbidity
algae
Eukaryota
description The relative abundance of the different picoplankton components (eukaryotic picophytoplankton (Peuk), picocyanobacteria (Pcy) and bacterioplankton), and their relationships with the lake conditions were studied in three types of shallow lakes from the Pampa Plain (Argentina) that differ in their optical properties: clear-vegetated, phytoplankton-turbid and inorganic-turbid. All the selected lakes, but one, are characterized by their different alternative steady state (clear-vegetated and phytoplankton-turbid water phases) following the model proposed by Scheffer et al. (1993).Autotrophic and heterotrophic picoplankton abundances were analyzed seasonally in relation to environmental variables. All the lakes presented high concentrations of total nitrogen (TN) (>229μgL-1), total phosphorus (TP) (>46μgL-1) and dissolved organic carbon (DOC) (>13.7mgL-1). Clear-vegetated lakes were characterized by vertical diffuse PAR (photosynthetic active radiation) attenuation coefficient (kdPAR) lower than 11m-1, whereas inorganic-turbid lake always showed values higher than 21.1m-1. The euphotic zone depth (Z1%) was wider in clear-vegetated lakes (40-140cm) and thinner in the inorganic-turbid (10-20cm). The phytoplankton-turbid lakes presented a wide range in the values of these variables (kdPAR: 5.2-35.8m-1; Z1%: 10-90cm). Phytoplankton chlorophyll-a (Chl-a) strongly differed, ranging from 1.6 to 334.6μgL-1. Picophytoplankton was mainly represented by phycocianine-rich (PC-rich) Pcy in all cases, dominating over Peuk algae. The total and relative abundances of eukaryotic picophytoplankton, Pcy and bacterioplankton, as well as the size structure of the phytoplankton community differed among the water bodies. In general, clear-vegetated water bodies exhibited similar abiotic characteristics, picophytoplankton/bacterioplankton ratios, and phytoplankton size structure. Contrarily, no clear trend was identified for the group of turbid lakes. The contrasting results obtained for the importance of the picoplankton components in phytoplankton-turbid shallow lakes evidence that the availability of the energetical and nutrient resources cannot be solely considered to predict their relative importance in this type of shallow lake. © 2010 Elsevier GmbH.
author Silvoso, Julieta E.
Izaguirre, Irina
Allende, Luz
author_facet Silvoso, Julieta E.
Izaguirre, Irina
Allende, Luz
author_sort Silvoso, Julieta E.
title Picoplankton structure in clear and turbid eutrophic shallow lakes: A seasonal study
title_short Picoplankton structure in clear and turbid eutrophic shallow lakes: A seasonal study
title_full Picoplankton structure in clear and turbid eutrophic shallow lakes: A seasonal study
title_fullStr Picoplankton structure in clear and turbid eutrophic shallow lakes: A seasonal study
title_full_unstemmed Picoplankton structure in clear and turbid eutrophic shallow lakes: A seasonal study
title_sort picoplankton structure in clear and turbid eutrophic shallow lakes: a seasonal study
publishDate 2011
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00759511_v41_n3_p181_Silvoso
http://hdl.handle.net/20.500.12110/paper_00759511_v41_n3_p181_Silvoso
work_keys_str_mv AT silvosojulietae picoplanktonstructureinclearandturbideutrophicshallowlakesaseasonalstudy
AT izaguirreirina picoplanktonstructureinclearandturbideutrophicshallowlakesaseasonalstudy
AT allendeluz picoplanktonstructureinclearandturbideutrophicshallowlakesaseasonalstudy
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