Phytoplankton structure and dynamics in a turbid Antarctic lake (Potter Peninsula, King George Island)
Qualitative and quantitative changes in the freshwater phytoplankton from one of the largest lakes in Potter Peninsula were studied during the summer period of 1995/1996. The main limnological features were analysed. This research constitutes the first study dealing with the phytoplankton structure...
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| Formato: | Capítulo de libro |
| Lenguaje: | Inglés |
| Publicado: |
1999
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| LEADER | 13702caa a22010817a 4500 | ||
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| 001 | PAPER-2707 | ||
| 003 | AR-BaUEN | ||
| 005 | 20250217143705.0 | ||
| 008 | 190411s1999 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-0032770462 | |
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| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 100 | 1 | |a Unrein, Fernando | |
| 245 | 1 | 0 | |a Phytoplankton structure and dynamics in a turbid Antarctic lake (Potter Peninsula, King George Island) |
| 260 | |c 1999 | ||
| 270 | 1 | 0 | |m Unrein, F.; Departamento Cs. Biologicas, Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, (1428) Buenos Aires, Argentina; email: fer@bg.fcen.uba.ar |
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| 506 | |2 openaire |e Política editorial | ||
| 520 | 3 | |a Qualitative and quantitative changes in the freshwater phytoplankton from one of the largest lakes in Potter Peninsula were studied during the summer period of 1995/1996. The main limnological features were analysed. This research constitutes the first study dealing with the phytoplankton structure and dynamics from lakes in Potter Peninsula. Due to the mixing of the water column by the constant wind action during the ice-free period, neither physical, chemical nor biological parameters showed differences between depths. Soluble reactive phosphorus remained low (26 μg l-1) while total phosphorus concentrations were up to 232 μg l-1. Suspended solids and total phosphorus differed significantly between the two basins in which the lake is divided. Sixty-five taxa were identified. The Bacillariophyceae was the dominant class followed by Chrysophyceae. Achnanthes lanceolata var. haynaldii and Hydrurus foetidus (cysts) were the dominant species. Tychoplanktonic species were the best represented in terms of abundance and species richness. The principal component analysis carried out with abiotic variables showed a temporal gradient characterised by the augmentation of suspended solids, total phosphorus, conductivity, pH and NH4-N to the end of the summer period. The Principal Component Analysis performed with biotic variables also showed a temporal trend related to a decline in phytoplankton density and an enhancement of chlorophyll-a despite a slight increase of light limitation during the study period. This inverse relation may be due to the presence of picoplankton in chlorophyll-a samples. The potential effect of grazing on the phytoplankton structure is a subject to be tested in future studies. |l eng | |
| 536 | |a Detalles de la financiación: Acknowledgements The present study is part of a major research project on the taxonomy and ecology of freshwater algae from lakes and streams of Potter Peninsula and was financially supported by the National Antarctic Direction and Buenos Aires University (Argentina). We wish to thank all the members of Jubany Station for their logistic support and Dr. I. O'Farrell for revision of the English version. We are grateful to Lic. R. Lom-bardo for the revision of the statistical procedures and to Dr. G. Tell, Dr. P. Broady, Dr. I. Izaguirre and an anonymous reviewer for their critical comments on the manuscript. | ||
| 593 | |a Departamento Cs. Biológicas, Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, (1428) Buenos Aires, Argentina | ||
| 650 | 1 | 7 | |2 spines |a PH |
| 690 | 1 | 0 | |a BIOLOGICAL PARAMETERS |
| 690 | 1 | 0 | |a MARINE ENVIRONMENT |
| 690 | 1 | 0 | |a PHOSPHORUS |
| 690 | 1 | 0 | |a POPULATION STRUCTURE |
| 690 | 1 | 0 | |a PRINCIPAL COMPONENT ANALYSIS |
| 690 | 1 | 0 | |a LAKE |
| 690 | 1 | 0 | |a PHYTOPLANKTON |
| 690 | 1 | 0 | |a POPULATION DYNAMICS |
| 690 | 1 | 0 | |a POPULATION STRUCTURE |
| 690 | 1 | 0 | |a ANTARCTICA |
| 690 | 1 | 0 | |a ACHNANTHES LANCEOLATA |
| 690 | 1 | 0 | |a HYDRURUS FOETIDUS |
| 700 | 1 | |a Vinocur, A. | |
| 773 | 0 | |d 1999 |g v. 22 |h pp. 93-101 |k n. 2 |p Polar Biol. |x 07224060 |t Polar Biology | |
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