Periphyton on artificial substrata from three lakes of different trophic status at Hope Bay “Antarctica”

The nutrient characteristics of aquatic environments at Hope Bay “Antarctica” depend on different factors, penguin enrichment being one of the most important. In this study we surveyed three water bodies of different morphometry and trophic status: Esperanza Lake “oligotrophic”, Boeckella Lake “meso...

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Detalles Bibliográficos
Autores principales: Pizarro, H., Vinocur, A., Tell, G.
Formato: JOUR
Materias:
artificial substrate
lake ecosystem
morphometry
periphyton
seabird
trophic status
Antarctica
algae
Bacillariophyceae
Chlamydomonas
Chlamydomonas subcaudata
Esperanza
Eukaryota
Fraxinus
Spheniscidae
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_07224060_v25_n3_p169_Pizarro
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_07224060_v25_n3_p169_Pizarro
record_format dspace
spelling todo:paper_07224060_v25_n3_p169_Pizarro2023-10-03T15:36:58Z Periphyton on artificial substrata from three lakes of different trophic status at Hope Bay “Antarctica” Pizarro, H. Vinocur, A. Tell, G. artificial substrate lake ecosystem morphometry periphyton seabird trophic status Antarctica algae Bacillariophyceae Chlamydomonas Chlamydomonas subcaudata Esperanza Eukaryota Fraxinus Spheniscidae The nutrient characteristics of aquatic environments at Hope Bay “Antarctica” depend on different factors, penguin enrichment being one of the most important. In this study we surveyed three water bodies of different morphometry and trophic status: Esperanza Lake “oligotrophic”, Boeckella Lake “meso-eutrophic”, and Pingui Pond “hypereutrophic”. This research provides a preliminary characterization of the periphyton colonization on artificial substrata “glass slides” of these water bodies from the end of January to mid-March 2000. Qualitative and quantitative analyses of the algae, chlorophyll a, dry weight, ash-free dry weight, and physical and chemical variables of the lakes were assessed. The Autotrophic Index and the Lakatos system of classification were also applied. All three lakes differed clearly in all the variables considered. The periphyton from Esperanza Lake was first dominated by Bacillariophyceae and subsequently by the chrysophyce Phaeogloea mucosa. P. mucosa was the dominant species at Boeckella Lake and Chlamydomonas subcaudata was dominant at Pingui Pond. Highest mean maximum density values were reached at Pingui Pond, followed by Boeckella and Esperanza Lakes. Highest biomass figures were registered with increasing trophic status. According to the Lakatos index, the periphyton of Esperanza Lake was the least developed and it was mainly organic and heterotrophic; Boeckella Lake showed intermediate development in periphyton mass, which was autotrophic and mainly inorganic whereas Pingui Pond showed the highest development in periphytic mass, and it was mainly autotrophic. Fil:Pizarro, H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vinocur, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_07224060_v25_n3_p169_Pizarro
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic artificial substrate
lake ecosystem
morphometry
periphyton
seabird
trophic status
Antarctica
algae
Bacillariophyceae
Chlamydomonas
Chlamydomonas subcaudata
Esperanza
Eukaryota
Fraxinus
Spheniscidae
spellingShingle artificial substrate
lake ecosystem
morphometry
periphyton
seabird
trophic status
Antarctica
algae
Bacillariophyceae
Chlamydomonas
Chlamydomonas subcaudata
Esperanza
Eukaryota
Fraxinus
Spheniscidae
Pizarro, H.
Vinocur, A.
Tell, G.
Periphyton on artificial substrata from three lakes of different trophic status at Hope Bay “Antarctica”
topic_facet artificial substrate
lake ecosystem
morphometry
periphyton
seabird
trophic status
Antarctica
algae
Bacillariophyceae
Chlamydomonas
Chlamydomonas subcaudata
Esperanza
Eukaryota
Fraxinus
Spheniscidae
description The nutrient characteristics of aquatic environments at Hope Bay “Antarctica” depend on different factors, penguin enrichment being one of the most important. In this study we surveyed three water bodies of different morphometry and trophic status: Esperanza Lake “oligotrophic”, Boeckella Lake “meso-eutrophic”, and Pingui Pond “hypereutrophic”. This research provides a preliminary characterization of the periphyton colonization on artificial substrata “glass slides” of these water bodies from the end of January to mid-March 2000. Qualitative and quantitative analyses of the algae, chlorophyll a, dry weight, ash-free dry weight, and physical and chemical variables of the lakes were assessed. The Autotrophic Index and the Lakatos system of classification were also applied. All three lakes differed clearly in all the variables considered. The periphyton from Esperanza Lake was first dominated by Bacillariophyceae and subsequently by the chrysophyce Phaeogloea mucosa. P. mucosa was the dominant species at Boeckella Lake and Chlamydomonas subcaudata was dominant at Pingui Pond. Highest mean maximum density values were reached at Pingui Pond, followed by Boeckella and Esperanza Lakes. Highest biomass figures were registered with increasing trophic status. According to the Lakatos index, the periphyton of Esperanza Lake was the least developed and it was mainly organic and heterotrophic; Boeckella Lake showed intermediate development in periphyton mass, which was autotrophic and mainly inorganic whereas Pingui Pond showed the highest development in periphytic mass, and it was mainly autotrophic.
format JOUR
author Pizarro, H.
Vinocur, A.
Tell, G.
author_facet Pizarro, H.
Vinocur, A.
Tell, G.
author_sort Pizarro, H.
title Periphyton on artificial substrata from three lakes of different trophic status at Hope Bay “Antarctica”
title_short Periphyton on artificial substrata from three lakes of different trophic status at Hope Bay “Antarctica”
title_full Periphyton on artificial substrata from three lakes of different trophic status at Hope Bay “Antarctica”
title_fullStr Periphyton on artificial substrata from three lakes of different trophic status at Hope Bay “Antarctica”
title_full_unstemmed Periphyton on artificial substrata from three lakes of different trophic status at Hope Bay “Antarctica”
title_sort periphyton on artificial substrata from three lakes of different trophic status at hope bay “antarctica”
url http://hdl.handle.net/20.500.12110/paper_07224060_v25_n3_p169_Pizarro
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AT vinocura periphytononartificialsubstratafromthreelakesofdifferenttrophicstatusathopebayantarctica
AT tellg periphytononartificialsubstratafromthreelakesofdifferenttrophicstatusathopebayantarctica
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