Primary production of phytoplankton and periphyton in two humic lakes of a South American wetland

Seasonal primary productivities of periphyton and phytoplankton were compared in Grande Lake (GL) and a relict oxbow lake (ROL) in winter 2006 and summer 2007. GL was free of floating plants on the sampling dates and covered over 80 and 100% of the ROL surface in winter and summer, respectively. The...

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Autores principales: Rodríguez, P., Vera, M.S., Pizarro, H.
Formato: JOUR
Materias:
Floodplain wetland
Humic shallow lakes
Periphytic algae
Phytoplankton
Primary production
floodplain
humic lake
macrophyte
periphyton
photosynthesis
phytoplankton
primary production
shallow water
water column
South America
algae
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_14398621_v13_n3_p281_Rodriguez
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_14398621_v13_n3_p281_Rodriguez
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spelling todo:paper_14398621_v13_n3_p281_Rodriguez2023-10-03T16:16:19Z Primary production of phytoplankton and periphyton in two humic lakes of a South American wetland Rodríguez, P. Vera, M.S. Pizarro, H. Floodplain wetland Humic shallow lakes Periphytic algae Phytoplankton Primary production floodplain humic lake macrophyte periphyton photosynthesis phytoplankton primary production shallow water water column South America algae Seasonal primary productivities of periphyton and phytoplankton were compared in Grande Lake (GL) and a relict oxbow lake (ROL) in winter 2006 and summer 2007. GL was free of floating plants on the sampling dates and covered over 80 and 100% of the ROL surface in winter and summer, respectively. The 14C assimilation technique was used to obtain the P-E curves of phytoplankton and periphyton on artificial substrata. The periphytic maximum photosynthetic rate (P max) was higher in the ROL in winter and summer, being better adapted to low irradiances than those in the GL. Phytoplankton and periphytic algae were light-limited in the ROL in summer due to complete coverage by floating macrophytes. In summer, P max and α values for periphyton in the ROL were higher than those for phytoplankton, and were even higher than in GL. In turn, P max and α values for phytoplankton in Grande Lake were higher than those for periphyton due to improved light conditions and the presence of algae that were adapted to movement through the water column. These results suggest that the complete coverage by floating macrophytes restricted phytoplankton productivity and allowed the development of a periphytic community that was better adapted to low-light conditions. © 2012 The Japanese Society of Limnology. Fil:Rodríguez, P. 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. Fil:Pizarro, H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_14398621_v13_n3_p281_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 Floodplain wetland
Humic shallow lakes
Periphytic algae
Phytoplankton
Primary production
floodplain
humic lake
macrophyte
periphyton
photosynthesis
phytoplankton
primary production
shallow water
water column
South America
algae
spellingShingle Floodplain wetland
Humic shallow lakes
Periphytic algae
Phytoplankton
Primary production
floodplain
humic lake
macrophyte
periphyton
photosynthesis
phytoplankton
primary production
shallow water
water column
South America
algae
Rodríguez, P.
Vera, M.S.
Pizarro, H.
Primary production of phytoplankton and periphyton in two humic lakes of a South American wetland
topic_facet Floodplain wetland
Humic shallow lakes
Periphytic algae
Phytoplankton
Primary production
floodplain
humic lake
macrophyte
periphyton
photosynthesis
phytoplankton
primary production
shallow water
water column
South America
algae
description Seasonal primary productivities of periphyton and phytoplankton were compared in Grande Lake (GL) and a relict oxbow lake (ROL) in winter 2006 and summer 2007. GL was free of floating plants on the sampling dates and covered over 80 and 100% of the ROL surface in winter and summer, respectively. The 14C assimilation technique was used to obtain the P-E curves of phytoplankton and periphyton on artificial substrata. The periphytic maximum photosynthetic rate (P max) was higher in the ROL in winter and summer, being better adapted to low irradiances than those in the GL. Phytoplankton and periphytic algae were light-limited in the ROL in summer due to complete coverage by floating macrophytes. In summer, P max and α values for periphyton in the ROL were higher than those for phytoplankton, and were even higher than in GL. In turn, P max and α values for phytoplankton in Grande Lake were higher than those for periphyton due to improved light conditions and the presence of algae that were adapted to movement through the water column. These results suggest that the complete coverage by floating macrophytes restricted phytoplankton productivity and allowed the development of a periphytic community that was better adapted to low-light conditions. © 2012 The Japanese Society of Limnology.
format JOUR
author Rodríguez, P.
Vera, M.S.
Pizarro, H.
author_facet Rodríguez, P.
Vera, M.S.
Pizarro, H.
author_sort Rodríguez, P.
title Primary production of phytoplankton and periphyton in two humic lakes of a South American wetland
title_short Primary production of phytoplankton and periphyton in two humic lakes of a South American wetland
title_full Primary production of phytoplankton and periphyton in two humic lakes of a South American wetland
title_fullStr Primary production of phytoplankton and periphyton in two humic lakes of a South American wetland
title_full_unstemmed Primary production of phytoplankton and periphyton in two humic lakes of a South American wetland
title_sort primary production of phytoplankton and periphyton in two humic lakes of a south american wetland
url http://hdl.handle.net/20.500.12110/paper_14398621_v13_n3_p281_Rodriguez
work_keys_str_mv AT rodriguezp primaryproductionofphytoplanktonandperiphytonintwohumiclakesofasouthamericanwetland
AT verams primaryproductionofphytoplanktonandperiphytonintwohumiclakesofasouthamericanwetland
AT pizarroh primaryproductionofphytoplanktonandperiphytonintwohumiclakesofasouthamericanwetland
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