Macrophyte influence on the structure and productivity of photosynthetic picoplankton in wetlands

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We used multiple approaches to analyze photosynthetic picoplankton (PPP) structure and production in a wetland in the Lower Paraná Basin (Argentina). A seasonal field survey was combined with an experimental study to analyze PPP variability under different light conditions. Flow cytometry analyses s...

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Autores principales: Izaguirre, I., Pizarro, H., De Tezanos Pinto, P., Rodríguez, P., O'Farrell, I., Unrein, F., Gasol, J.M.
Formato: Artículo publishedVersion
Publicado: 2010
Materias:
annual variation
cyanobacterium
experimental study
field survey
flow cytometry
lake ecosystem
macrophyte
mesocosm
photosynthesis
picoplankton
productivity
wetland
Parana Basin
algae
Photobacteria
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01427873_v32_n2_p221_Izaguirre
http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_01427873_v32_n2_p221_Izaguirre_oai
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Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires
id I28-R145-paper_01427873_v32_n2_p221_Izaguirre_oai
record_format dspace
spelling I28-R145-paper_01427873_v32_n2_p221_Izaguirre_oai2020-10-19 Izaguirre, I. Pizarro, H. De Tezanos Pinto, P. Rodríguez, P. O'Farrell, I. Unrein, F. Gasol, J.M. 2010 We used multiple approaches to analyze photosynthetic picoplankton (PPP) structure and production in a wetland in the Lower Paraná Basin (Argentina). A seasonal field survey was combined with an experimental study to analyze PPP variability under different light conditions. Flow cytometry analyses showed differences in PPP structure among the aquatic environments. Three main picoplankton populations were distinguished: phycocyanin-rich picocyanobacteria (Pcy), picoeukaryote (Peuk) and anaerobic anoxygenic photosynthetic bacteria (AnAnPB). The experimental study revealed important changes in PPP structure in relation to the light conditions imposed by floating plants: enclosures exposed to light showed a higher proportion of Peuk and Pcy over AnAnPB; in mesocosms covered by plants, just as in the highly vegetated relict lakes (ROLs), AnAnPB were dominant. Total picophytoplankton abundances varied from 1.7 × 104 to 4.6 × 105 cells mL-1 in the shallow lakes, and were lower (0.69 × 10 4 to 2.5 × 105 cells mL-1) in the ROLs. Annual variations in temperature and hydrological conditions influenced the PPP abundances, observing maximum values during the warm dry phase. The photosynthetic rates per unit area of PPP (PAPPP) and algae >3 μm (PA>3 μm) were measured in the aquatic environments in winter and summer: PA PPP (1.5 to 100 mg C m-2h-1) was lower than PA >3 μm and was directly affected by light, which was limiting under the dense floating plant cover. Fil:Izaguirre, I. 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:De Tezanos Pinto, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Rodríguez, 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:Unrein, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. application/pdf http://hdl.handle.net/20.500.12110/paper_01427873_v32_n2_p221_Izaguirre info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar J. Plankton Res. 2010;32(2):221-238 annual variation cyanobacterium experimental study field survey flow cytometry lake ecosystem macrophyte mesocosm photosynthesis picoplankton productivity wetland Parana Basin algae Photobacteria Macrophyte influence on the structure and productivity of photosynthetic picoplankton in wetlands info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_01427873_v32_n2_p221_Izaguirre_oai
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-145
collection Repositorio Digital de la Universidad de Buenos Aires (UBA)
topic annual variation
cyanobacterium
experimental study
field survey
flow cytometry
lake ecosystem
macrophyte
mesocosm
photosynthesis
picoplankton
productivity
wetland
Parana Basin
algae
Photobacteria
spellingShingle annual variation
cyanobacterium
experimental study
field survey
flow cytometry
lake ecosystem
macrophyte
mesocosm
photosynthesis
picoplankton
productivity
wetland
Parana Basin
algae
Photobacteria
Izaguirre, I.
Pizarro, H.
De Tezanos Pinto, P.
Rodríguez, P.
O'Farrell, I.
Unrein, F.
Gasol, J.M.
Macrophyte influence on the structure and productivity of photosynthetic picoplankton in wetlands
topic_facet annual variation
cyanobacterium
experimental study
field survey
flow cytometry
lake ecosystem
macrophyte
mesocosm
photosynthesis
picoplankton
productivity
wetland
Parana Basin
algae
Photobacteria
description We used multiple approaches to analyze photosynthetic picoplankton (PPP) structure and production in a wetland in the Lower Paraná Basin (Argentina). A seasonal field survey was combined with an experimental study to analyze PPP variability under different light conditions. Flow cytometry analyses showed differences in PPP structure among the aquatic environments. Three main picoplankton populations were distinguished: phycocyanin-rich picocyanobacteria (Pcy), picoeukaryote (Peuk) and anaerobic anoxygenic photosynthetic bacteria (AnAnPB). The experimental study revealed important changes in PPP structure in relation to the light conditions imposed by floating plants: enclosures exposed to light showed a higher proportion of Peuk and Pcy over AnAnPB; in mesocosms covered by plants, just as in the highly vegetated relict lakes (ROLs), AnAnPB were dominant. Total picophytoplankton abundances varied from 1.7 × 104 to 4.6 × 105 cells mL-1 in the shallow lakes, and were lower (0.69 × 10 4 to 2.5 × 105 cells mL-1) in the ROLs. Annual variations in temperature and hydrological conditions influenced the PPP abundances, observing maximum values during the warm dry phase. The photosynthetic rates per unit area of PPP (PAPPP) and algae >3 μm (PA>3 μm) were measured in the aquatic environments in winter and summer: PA PPP (1.5 to 100 mg C m-2h-1) was lower than PA >3 μm and was directly affected by light, which was limiting under the dense floating plant cover.
format Artículo
Artículo
publishedVersion
author Izaguirre, I.
Pizarro, H.
De Tezanos Pinto, P.
Rodríguez, P.
O'Farrell, I.
Unrein, F.
Gasol, J.M.
author_facet Izaguirre, I.
Pizarro, H.
De Tezanos Pinto, P.
Rodríguez, P.
O'Farrell, I.
Unrein, F.
Gasol, J.M.
author_sort Izaguirre, I.
title Macrophyte influence on the structure and productivity of photosynthetic picoplankton in wetlands
title_short Macrophyte influence on the structure and productivity of photosynthetic picoplankton in wetlands
title_full Macrophyte influence on the structure and productivity of photosynthetic picoplankton in wetlands
title_fullStr Macrophyte influence on the structure and productivity of photosynthetic picoplankton in wetlands
title_full_unstemmed Macrophyte influence on the structure and productivity of photosynthetic picoplankton in wetlands
title_sort macrophyte influence on the structure and productivity of photosynthetic picoplankton in wetlands
publishDate 2010
url http://hdl.handle.net/20.500.12110/paper_01427873_v32_n2_p221_Izaguirre
http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_01427873_v32_n2_p221_Izaguirre_oai
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