Comparative study of the planktonic communities of three lakes of contrasting trophic status at Hope Bay (Antarctic Peninsula)

Three water bodies of contrasting trophic status located at Hope Bay (Antarctic Peninsula) were studied during the summer of 1999, analysing all of their planktonic communities (zooplankton, phytoplankton and bacterioplankton) and their main limnological features. Important differences associated wi...

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Detalles Bibliográficos
Autores principales: Izaguirre, Irina, Allende, Luz
Publicado: 2003
Materias:
community structure
lake ecosystem
plankton
trophic status
Antarctica
Bacillariophyta
Bdelloida
Chrysophyceae
Ciliophora
Copepoda
Mastigophora (flagellates)
Oscillatoria
Philodina
Rotifera
Volvocales
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01427873_v25_n9_p1079_Izaguirre
http://hdl.handle.net/20.500.12110/paper_01427873_v25_n9_p1079_Izaguirre
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_01427873_v25_n9_p1079_Izaguirre
record_format dspace
spelling paper:paper_01427873_v25_n9_p1079_Izaguirre2023-06-08T15:11:30Z Comparative study of the planktonic communities of three lakes of contrasting trophic status at Hope Bay (Antarctic Peninsula) Izaguirre, Irina Allende, Luz community structure lake ecosystem plankton trophic status Antarctica Bacillariophyta Bdelloida Chrysophyceae Ciliophora Copepoda Mastigophora (flagellates) Oscillatoria Philodina Rotifera Volvocales Three water bodies of contrasting trophic status located at Hope Bay (Antarctic Peninsula) were studied during the summer of 1999, analysing all of their planktonic communities (zooplankton, phytoplankton and bacterioplankton) and their main limnological features. Important differences associated with their trophic conditions were found among lakes. At one extreme of the gradient, in the most oligotrophic lake (Lake Chico), the nektobenthic copepod Boeckella poppei and the rotifer Philodina gregaria were dominant in the open waters, and copepods presented a single reproductive event (univoltine life cycle); phytoplankton exhibited the lowest densities, dominated by nanoplanktonic Chrysophyceae and picocyanobacteria. In the meso-eutrophic Lake Boeckella, B. poppei, the dominant zooplankter, exhibited a multivoltine life cycle; phytoplankton were mainly represented by nanoplanktonic species of Volvocales, alternating with flagellate Chrysophyceae, and a great abundance of picocyanobacteria. In the hypertrophic Pingüi Pond, zooplankters were exclusively represented by bdelloid rotifers and ciliates; phytoplankton samples included some strictly planktonic species (Volvocales), a great proportion of picocyanobacteria and many typically benthic species (oscillatorians and diatoms) due to the shallowness of the water body. Bacterioplankton densities did not show important differences among lakes, but fluctuations, probably associated with a top-down control, were observed in the hypertrophic pond. This paper constitutes the first survey concerning all the planktonic compartments of water bodies of different trophic status at Hope Bay, describing the relative contributions of autotrophic and heterotrophic components to their food webs. Fil:Izaguirre, I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Allende, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2003 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01427873_v25_n9_p1079_Izaguirre http://hdl.handle.net/20.500.12110/paper_01427873_v25_n9_p1079_Izaguirre
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic community structure
lake ecosystem
plankton
trophic status
Antarctica
Bacillariophyta
Bdelloida
Chrysophyceae
Ciliophora
Copepoda
Mastigophora (flagellates)
Oscillatoria
Philodina
Rotifera
Volvocales
spellingShingle community structure
lake ecosystem
plankton
trophic status
Antarctica
Bacillariophyta
Bdelloida
Chrysophyceae
Ciliophora
Copepoda
Mastigophora (flagellates)
Oscillatoria
Philodina
Rotifera
Volvocales
Izaguirre, Irina
Allende, Luz
Comparative study of the planktonic communities of three lakes of contrasting trophic status at Hope Bay (Antarctic Peninsula)
topic_facet community structure
lake ecosystem
plankton
trophic status
Antarctica
Bacillariophyta
Bdelloida
Chrysophyceae
Ciliophora
Copepoda
Mastigophora (flagellates)
Oscillatoria
Philodina
Rotifera
Volvocales
description Three water bodies of contrasting trophic status located at Hope Bay (Antarctic Peninsula) were studied during the summer of 1999, analysing all of their planktonic communities (zooplankton, phytoplankton and bacterioplankton) and their main limnological features. Important differences associated with their trophic conditions were found among lakes. At one extreme of the gradient, in the most oligotrophic lake (Lake Chico), the nektobenthic copepod Boeckella poppei and the rotifer Philodina gregaria were dominant in the open waters, and copepods presented a single reproductive event (univoltine life cycle); phytoplankton exhibited the lowest densities, dominated by nanoplanktonic Chrysophyceae and picocyanobacteria. In the meso-eutrophic Lake Boeckella, B. poppei, the dominant zooplankter, exhibited a multivoltine life cycle; phytoplankton were mainly represented by nanoplanktonic species of Volvocales, alternating with flagellate Chrysophyceae, and a great abundance of picocyanobacteria. In the hypertrophic Pingüi Pond, zooplankters were exclusively represented by bdelloid rotifers and ciliates; phytoplankton samples included some strictly planktonic species (Volvocales), a great proportion of picocyanobacteria and many typically benthic species (oscillatorians and diatoms) due to the shallowness of the water body. Bacterioplankton densities did not show important differences among lakes, but fluctuations, probably associated with a top-down control, were observed in the hypertrophic pond. This paper constitutes the first survey concerning all the planktonic compartments of water bodies of different trophic status at Hope Bay, describing the relative contributions of autotrophic and heterotrophic components to their food webs.
author Izaguirre, Irina
Allende, Luz
author_facet Izaguirre, Irina
Allende, Luz
author_sort Izaguirre, Irina
title Comparative study of the planktonic communities of three lakes of contrasting trophic status at Hope Bay (Antarctic Peninsula)
title_short Comparative study of the planktonic communities of three lakes of contrasting trophic status at Hope Bay (Antarctic Peninsula)
title_full Comparative study of the planktonic communities of three lakes of contrasting trophic status at Hope Bay (Antarctic Peninsula)
title_fullStr Comparative study of the planktonic communities of three lakes of contrasting trophic status at Hope Bay (Antarctic Peninsula)
title_full_unstemmed Comparative study of the planktonic communities of three lakes of contrasting trophic status at Hope Bay (Antarctic Peninsula)
title_sort comparative study of the planktonic communities of three lakes of contrasting trophic status at hope bay (antarctic peninsula)
publishDate 2003
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01427873_v25_n9_p1079_Izaguirre
http://hdl.handle.net/20.500.12110/paper_01427873_v25_n9_p1079_Izaguirre
work_keys_str_mv AT izaguirreirina comparativestudyoftheplanktoniccommunitiesofthreelakesofcontrastingtrophicstatusathopebayantarcticpeninsula
AT allendeluz comparativestudyoftheplanktoniccommunitiesofthreelakesofcontrastingtrophicstatusathopebayantarcticpeninsula
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