Factors regulating summer phytoplankton in a highly eutrophic Antarctic lake
Lakes from Maritime Antarctica are regarded as systems generally inhabited by metazoan plankton capable of imposing a top-down control on the phytoplankton during short periods, while lakes from Continental Antarctica lacking these communities would be typically controlled by scarcity of nutrients,...
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ftconicet:oai:ri.conicet.gov.ar:11336/71670 2023-10-09T21:47:09+02:00 Factors regulating summer phytoplankton in a highly eutrophic Antarctic lake Mataloni, Maria Gabriela Tesolín, G. Sacullo, F. Tell, G. application/pdf http://hdl.handle.net/11336/71670 eng eng Springer info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1023/A:1004045219437 info:eu-repo/semantics/altIdentifier/doi/10.1023/A:1004045219437 http://hdl.handle.net/11336/71670 Mataloni, Maria Gabriela; Tesolín, G.; Sacullo, F.; Tell, G.; Factors regulating summer phytoplankton in a highly eutrophic Antarctic lake; Springer; Hydrobiologia; 432; 1-3; 5-2000; 65-72 0018-8158 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Antarctica Ecology Grazing Lakes Phytoplankton https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1023/A:1004045219437 2023-09-24T19:23:10Z Lakes from Maritime Antarctica are regarded as systems generally inhabited by metazoan plankton capable of imposing a top-down control on the phytoplankton during short periods, while lakes from Continental Antarctica lacking these communities would be typically controlled by scarcity of nutrients, following a bottom-up model. Otero Lake is a highly eutrophic small lake located on the NW of the Antarctic Peninsula, which has no metazoan plankton. During summer 1996, we studied the density, composition and vertical distribution of the phytoplankton community of this lake with respect to various abiotic variables, yet our results demonstrated neither light nor nutrient limitation of the phytoplankton biomass. Densities of heterotrophic nanoflagellates (HNAN) and ciliates from three different size categories were also studied. Extremely low densities of HNAN (0-155 ind. ml-1) could be due to feeding competition by bacterivore nanociliates and/or predation by large ciliates. A summer bloom of the phytoflagellate Chlamydomonas aff. celerrima Pascher reached densities tenfold those of previous years (158.103 ind. ml-1), though apparently curtailed by a strong peak of large ciliates (107 ind. ml-1) which would heavily graze on PNAN (phototrophic nanoflagellates). Top-down control can thus occur in this lake during short periods of long hydrologic residence time. Fil: Mataloni, Maria Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Biológicas; Argentina Fil: Tesolín, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Biológicas; Argentina Fil: Sacullo, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Biológicas; Argentina Fil: Tell, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Biológicas; Argentina Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic The Antarctic Antarctic Peninsula Argentina Strong Peak ENVELOPE(-82.300,-82.300,-79.933,-79.933) |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
Antarctica Ecology Grazing Lakes Phytoplankton https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
Antarctica Ecology Grazing Lakes Phytoplankton https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Mataloni, Maria Gabriela Tesolín, G. Sacullo, F. Tell, G. Factors regulating summer phytoplankton in a highly eutrophic Antarctic lake |
topic_facet |
Antarctica Ecology Grazing Lakes Phytoplankton https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
Lakes from Maritime Antarctica are regarded as systems generally inhabited by metazoan plankton capable of imposing a top-down control on the phytoplankton during short periods, while lakes from Continental Antarctica lacking these communities would be typically controlled by scarcity of nutrients, following a bottom-up model. Otero Lake is a highly eutrophic small lake located on the NW of the Antarctic Peninsula, which has no metazoan plankton. During summer 1996, we studied the density, composition and vertical distribution of the phytoplankton community of this lake with respect to various abiotic variables, yet our results demonstrated neither light nor nutrient limitation of the phytoplankton biomass. Densities of heterotrophic nanoflagellates (HNAN) and ciliates from three different size categories were also studied. Extremely low densities of HNAN (0-155 ind. ml-1) could be due to feeding competition by bacterivore nanociliates and/or predation by large ciliates. A summer bloom of the phytoflagellate Chlamydomonas aff. celerrima Pascher reached densities tenfold those of previous years (158.103 ind. ml-1), though apparently curtailed by a strong peak of large ciliates (107 ind. ml-1) which would heavily graze on PNAN (phototrophic nanoflagellates). Top-down control can thus occur in this lake during short periods of long hydrologic residence time. Fil: Mataloni, Maria Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Biológicas; Argentina Fil: Tesolín, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Biológicas; Argentina Fil: Sacullo, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Biológicas; Argentina Fil: Tell, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Biológicas; Argentina |
format |
Article in Journal/Newspaper |
author |
Mataloni, Maria Gabriela Tesolín, G. Sacullo, F. Tell, G. |
author_facet |
Mataloni, Maria Gabriela Tesolín, G. Sacullo, F. Tell, G. |
author_sort |
Mataloni, Maria Gabriela |
title |
Factors regulating summer phytoplankton in a highly eutrophic Antarctic lake |
title_short |
Factors regulating summer phytoplankton in a highly eutrophic Antarctic lake |
title_full |
Factors regulating summer phytoplankton in a highly eutrophic Antarctic lake |
title_fullStr |
Factors regulating summer phytoplankton in a highly eutrophic Antarctic lake |
title_full_unstemmed |
Factors regulating summer phytoplankton in a highly eutrophic Antarctic lake |
title_sort |
factors regulating summer phytoplankton in a highly eutrophic antarctic lake |
publisher |
Springer |
url |
http://hdl.handle.net/11336/71670 |
long_lat |
ENVELOPE(-82.300,-82.300,-79.933,-79.933) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Argentina Strong Peak |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Argentina Strong Peak |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1023/A:1004045219437 info:eu-repo/semantics/altIdentifier/doi/10.1023/A:1004045219437 http://hdl.handle.net/11336/71670 Mataloni, Maria Gabriela; Tesolín, G.; Sacullo, F.; Tell, G.; Factors regulating summer phytoplankton in a highly eutrophic Antarctic lake; Springer; Hydrobiologia; 432; 1-3; 5-2000; 65-72 0018-8158 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1023/A:1004045219437 |
_version_ |
1779309963568480256 |