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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todo:paper_00188158_v691_n1_p285_Rodriguez2023-10-03T14:16:05Z Size fractionated phytoplankton production in two humic shallow lakes with contrasting coverage of free floating plants Rodríguez, P. Pizarro, H. Vera, M.S. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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 |
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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, P. Pizarro, H. Vera, M.S. 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. |
| format |
JOUR |
| author |
Rodríguez, P. Pizarro, H. Vera, M.S. |
| author_facet |
Rodríguez, P. Pizarro, H. Vera, M.S. |
| author_sort |
Rodríguez, P. |
| 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 |
| url |
http://hdl.handle.net/20.500.12110/paper_00188158_v691_n1_p285_Rodriguez |
| work_keys_str_mv |
AT rodriguezp sizefractionatedphytoplanktonproductionintwohumicshallowlakeswithcontrastingcoverageoffreefloatingplants AT pizarroh sizefractionatedphytoplanktonproductionintwohumicshallowlakeswithcontrastingcoverageoffreefloatingplants AT verams sizefractionatedphytoplanktonproductionintwohumicshallowlakeswithcontrastingcoverageoffreefloatingplants |
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