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Abstract:

A eutrophic lake at Cierva Point, Antarctic Peninsula was surveyed during the summers of 1997 and 1998. Phytoplankton size fractions (micro-, nano- and picoplankton) were analysed, as well as the abundance of bacterioplankton and planktonic ciliates. No permanent vertical stratification was found owing to the shallowness of the lake. Both nutrient concentrations and chlorophyll a values indicated highly eutrophic conditions, which are a consequence of a natural enrichment by seabirds. Significant differences in temperature between the 1997 and 1998 seasons strongly influenced most of the biological features. The phytoplankton community showed a high algal species-richness, with important contributions of epilithic, cryobiontic and soil algae. The dominant algal group was Chlorophyta, mainly represented by Chlamydomonas aff. celerrima, followed by Chl. aff. braunii. Some replacement of phytoplanktonic species took place in summer and was more evident in 1998. Picophytoplankton reached high densities, similar to those reported from other Antarctic lakes. Bacterioplankton abundances were typical of eutrophic and hypereutrophic lakes. There was a positive correlation between bacterial and total phytoplankton abundance. Ciliates reached some very high peaks, with higher figures than those reported for other Antarctic systems with similar trophic status.

Registro:

Documento: Artículo
Título:Summer fluctuations of microbial planktonic communities in a eutrophic lake - Cierva Point, Antarctica
Autor:Izaguirre, I.; Mataloni, G.; Allende, L.; Vinocur, A.
Filiación:Depto CS. Biológicas, Facultad de Cs Exactas y Naturales, Universidad de Buenos Aires, (1428) Buenos Aires, Argentina
Conicet (Consejo Nacional de Investigaciones Científicas y Técnicas), Argentina
Palabras clave:Antarctica; community structure; correlation analysis; eutrophication; lake water; microbial community; nutrient concentration; population abundance; population density; season; species richness; trophic status; eutrophic environment; lake; microbial community; plankton; Antarctica; algae; Bacteria (microorganisms); Chlamydomonas; Chlorophyta; Ciliophora; Eukaryota
Año:2001
Volumen:23
Número:10
Página de inicio:1095
Página de fin:1109
Título revista:Journal of Plankton Research
Título revista abreviado:J. Plankton Res.
ISSN:01427873
CODEN:JPLRD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01427873_v23_n10_p1095_Izaguirre

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Citas:

---------- APA ----------
Izaguirre, I., Mataloni, G., Allende, L. & Vinocur, A. (2001) . Summer fluctuations of microbial planktonic communities in a eutrophic lake - Cierva Point, Antarctica. Journal of Plankton Research, 23(10), 1095-1109.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01427873_v23_n10_p1095_Izaguirre [ ]
---------- CHICAGO ----------
Izaguirre, I., Mataloni, G., Allende, L., Vinocur, A. "Summer fluctuations of microbial planktonic communities in a eutrophic lake - Cierva Point, Antarctica" . Journal of Plankton Research 23, no. 10 (2001) : 1095-1109.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01427873_v23_n10_p1095_Izaguirre [ ]
---------- MLA ----------
Izaguirre, I., Mataloni, G., Allende, L., Vinocur, A. "Summer fluctuations of microbial planktonic communities in a eutrophic lake - Cierva Point, Antarctica" . Journal of Plankton Research, vol. 23, no. 10, 2001, pp. 1095-1109.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01427873_v23_n10_p1095_Izaguirre [ ]
---------- VANCOUVER ----------
Izaguirre, I., Mataloni, G., Allende, L., Vinocur, A. Summer fluctuations of microbial planktonic communities in a eutrophic lake - Cierva Point, Antarctica. J. Plankton Res. 2001;23(10):1095-1109.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01427873_v23_n10_p1095_Izaguirre [ ]