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dc.contributor.author
Mataloni, Maria Gabriela
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dc.contributor.author
Tesolín, G.
dc.contributor.author
Sacullo, F.
dc.contributor.author
Tell, G.
dc.date.available
2019-03-14T18:47:21Z
dc.date.issued
2000-05
dc.identifier.citation
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
dc.identifier.issn
0018-8158
dc.identifier.uri
http://hdl.handle.net/11336/71670
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Antarctica
dc.subject
Ecology
dc.subject
Grazing
dc.subject
Lakes
dc.subject
Phytoplankton
dc.subject.classification
Otras Ciencias Biológicas
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dc.subject.classification
Ciencias Biológicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Factors regulating summer phytoplankton in a highly eutrophic Antarctic lake
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-03-14T14:09:59Z
dc.journal.volume
432
dc.journal.number
1-3
dc.journal.pagination
65-72
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Den Haag
dc.description.fil
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
dc.description.fil
Fil: Tesolín, G.. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Biológicas; Argentina
dc.description.fil
Fil: Sacullo, F.. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Biológicas; Argentina
dc.description.fil
Fil: Tell, G.. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Biológicas; Argentina
dc.journal.title
Hydrobiologia
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1023/A:1004045219437
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1023/A:1004045219437
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