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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Autores: Mataloni, Maria Gabriela, Tesolín, G., Sacullo, F., Tell, G.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2000
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/71670
Acceso en línea:http://hdl.handle.net/11336/71670
Access Level:acceso abierto
Palabra clave:Antarctica
Ecology
Grazing
Lakes
Phytoplankton
https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
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repository_id_str
spelling Factors regulating summer phytoplankton in a highly eutrophic Antarctic lakeMataloni, Maria GabrielaTesolín, G.Sacullo, F.Tell, G.AntarcticaEcologyGrazingLakesPhytoplanktonhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Lakes 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; ArgentinaFil: Tesolín, G.. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Biológicas; ArgentinaFil: Sacullo, F.. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Biológicas; ArgentinaFil: Tell, G.. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Biológicas; ArgentinaSpringer2000-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/71670Mataloni, 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; 65-720018-8158CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1023/A:1004045219437info:eu-repo/semantics/altIdentifier/doi/10.1023/A:1004045219437info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:56:31Zoai:ri.conicet.gov.ar:11336/71670instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982024-05-08 13:56:31.477CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Factors regulating summer phytoplankton in a highly eutrophic Antarctic lake
title Factors regulating summer phytoplankton in a highly eutrophic Antarctic lake
spellingShingle Factors regulating summer phytoplankton in a highly eutrophic Antarctic lake
Mataloni, Maria Gabriela
Antarctica
Ecology
Grazing
Lakes
Phytoplankton
https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
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
dc.creator.none.fl_str_mv Mataloni, Maria Gabriela
Tesolín, G.
Sacullo, F.
Tell, G.
author Mataloni, Maria Gabriela
author_facet Mataloni, Maria Gabriela
Tesolín, G.
Sacullo, F.
Tell, G.
author_role author
author2 Tesolín, G.
Sacullo, F.
Tell, G.
author2_role author
author
author
dc.subject.none.fl_str_mv Antarctica
Ecology
Grazing
Lakes
Phytoplankton
https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
topic 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.
publishDate 2000
dc.date.none.fl_str_mv 2000-05
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv 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
url http://hdl.handle.net/11336/71670
identifier_str_mv 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
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 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
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 15,811543

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