Phytoplankton morphological response to the underwater light conditions in a vegetated wetland
This study analyses the influence of the underwater light climate on the morphometric characteristics of the phytoplankton at the population and community levels. The differences in light conditions across the floodplain were mainly defined by the patchiness of floating macrophytes and humic acids c...
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2007
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00188158_v578_n1_p65_OFarrell http://hdl.handle.net/20.500.12110/paper_00188158_v578_n1_p65_OFarrell |
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paper:paper_00188158_v578_n1_p65_OFarrell2023-06-08T14:39:51Z Phytoplankton morphological response to the underwater light conditions in a vegetated wetland Macrophytes Morphology PAR Phytoplankton South American wetland Carboxylic acids Climate change Ecology Growth kinetics Hydrology Morphology Macrophytes PAR South American wetland Algae abundance behavioral response humic acid light effect macrophyte morphology patchiness phytoplankton wetland South America Mastigophora (flagellates) This study analyses the influence of the underwater light climate on the morphometric characteristics of the phytoplankton at the population and community levels. The differences in light conditions across the floodplain were mainly defined by the patchiness of floating macrophytes and humic acids concentration. A morphometric response at the community level to the underwater PAR was registered. Sites with strong light constraints were characterised by non-flagellated organisms or with a small proportion of unicellular flagellates. Short organisms (<10 μm) with a unit volume of less than 1,000 μm 3 and a high surface:volume ratio (S/V >2) were the morphotypes related to poorly illuminated environments. Moreover, the organisms showed forms more slender under these limiting conditions. This pattern was different to that registered in well-illuminated sites where longer and larger organisms, with a smaller S/V and frequently flagellated, coexisted with the previously mentioned organisms. The autotrophic picoplankton, the smallest phytoplankton fraction, revealed lower abundances at sites with higher humic substances. Short term morphological changes were additionally studied for the dominant species by means of mesocosm experiments simulating different light climates. Intraspecific morphological plasticity was observed with respect to the filament length and the vacuolization of cells. © 2007 Springer Science+Business Media B.V. 2007 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00188158_v578_n1_p65_OFarrell http://hdl.handle.net/20.500.12110/paper_00188158_v578_n1_p65_OFarrell |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Macrophytes Morphology PAR Phytoplankton South American wetland Carboxylic acids Climate change Ecology Growth kinetics Hydrology Morphology Macrophytes PAR South American wetland Algae abundance behavioral response humic acid light effect macrophyte morphology patchiness phytoplankton wetland South America Mastigophora (flagellates) |
| spellingShingle |
Macrophytes Morphology PAR Phytoplankton South American wetland Carboxylic acids Climate change Ecology Growth kinetics Hydrology Morphology Macrophytes PAR South American wetland Algae abundance behavioral response humic acid light effect macrophyte morphology patchiness phytoplankton wetland South America Mastigophora (flagellates) Phytoplankton morphological response to the underwater light conditions in a vegetated wetland |
| topic_facet |
Macrophytes Morphology PAR Phytoplankton South American wetland Carboxylic acids Climate change Ecology Growth kinetics Hydrology Morphology Macrophytes PAR South American wetland Algae abundance behavioral response humic acid light effect macrophyte morphology patchiness phytoplankton wetland South America Mastigophora (flagellates) |
| description |
This study analyses the influence of the underwater light climate on the morphometric characteristics of the phytoplankton at the population and community levels. The differences in light conditions across the floodplain were mainly defined by the patchiness of floating macrophytes and humic acids concentration. A morphometric response at the community level to the underwater PAR was registered. Sites with strong light constraints were characterised by non-flagellated organisms or with a small proportion of unicellular flagellates. Short organisms (<10 μm) with a unit volume of less than 1,000 μm 3 and a high surface:volume ratio (S/V >2) were the morphotypes related to poorly illuminated environments. Moreover, the organisms showed forms more slender under these limiting conditions. This pattern was different to that registered in well-illuminated sites where longer and larger organisms, with a smaller S/V and frequently flagellated, coexisted with the previously mentioned organisms. The autotrophic picoplankton, the smallest phytoplankton fraction, revealed lower abundances at sites with higher humic substances. Short term morphological changes were additionally studied for the dominant species by means of mesocosm experiments simulating different light climates. Intraspecific morphological plasticity was observed with respect to the filament length and the vacuolization of cells. © 2007 Springer Science+Business Media B.V. |
| title |
Phytoplankton morphological response to the underwater light conditions in a vegetated wetland |
| title_short |
Phytoplankton morphological response to the underwater light conditions in a vegetated wetland |
| title_full |
Phytoplankton morphological response to the underwater light conditions in a vegetated wetland |
| title_fullStr |
Phytoplankton morphological response to the underwater light conditions in a vegetated wetland |
| title_full_unstemmed |
Phytoplankton morphological response to the underwater light conditions in a vegetated wetland |
| title_sort |
phytoplankton morphological response to the underwater light conditions in a vegetated wetland |
| publishDate |
2007 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00188158_v578_n1_p65_OFarrell http://hdl.handle.net/20.500.12110/paper_00188158_v578_n1_p65_OFarrell |
| _version_ |
1768546051891920896 |