Summer phytoplankton structure and dynamics in an Antarctic lake (Potter Peninsula, South Shetland Islands)

Summer phytoplankton structure and dynamics in an Antarctic lake (Potter Peninsula, South Shetland Islands): The structure and dynamics of the phytoplankton community of a lake from Potter Peninsula (SSSI No 13, South Shetland Islands) were analyzed during the 1995-1996 summer together with the main...

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Autor principal: Unrein, F.
Formato: JOUR
Materias:
community dynamics
community structure
lake
phytoplankton
summer
Antarctica
Pseudodictyosphaerium jurisii
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03275477_v10_n2_p169_Unrein
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_03275477_v10_n2_p169_Unrein
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spelling todo:paper_03275477_v10_n2_p169_Unrein2023-10-03T15:24:42Z Summer phytoplankton structure and dynamics in an Antarctic lake (Potter Peninsula, South Shetland Islands) Unrein, F. community dynamics community structure lake phytoplankton summer Antarctica Pseudodictyosphaerium jurisii Summer phytoplankton structure and dynamics in an Antarctic lake (Potter Peninsula, South Shetland Islands): The structure and dynamics of the phytoplankton community of a lake from Potter Peninsula (SSSI No 13, South Shetland Islands) were analyzed during the 1995-1996 summer together with the main limnological features of this system. The surface of the water body was partially covered by ice (60%) at the beginning of the study. Important changes in the abiotic parameters and in the phytoplankton composition were observed during the melting process. Temperature, pH, conductivity and phytoplankton density and biomass increased during the ice-free period. Chlorophyll-a values were typical of oligo-mesotrophic lakes. SRP (soluble reactive phosphorus) values were always lower than 4 μg/L, while TP (total phosphorus) concentration fluctuated around 16 μg/L. Chlorophyta and Bacillariophyceae were the dominant groups in terms of density, biomass and species richness. Pseudodictyosphaerium jurisii (Hind.) Hind. (Chlorococcal) was the dominant species. A decrease in species equitability and diversity was observed as a consequence of the high density achieved by this species during the end of February. Other planktonic taxa of Chlorophyta were also present in low number. Bacillariophyceae, mainly represented by tychoplanktonic species, showed a small peak just at the final phase of ice thawing. Thus, an increase in species richness and diversity and a decrease in the similarity index (SIMI) applied to consecutives samples were observed during this period. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03275477_v10_n2_p169_Unrein
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 dynamics
community structure
lake
phytoplankton
summer
Antarctica
Pseudodictyosphaerium jurisii
spellingShingle community dynamics
community structure
lake
phytoplankton
summer
Antarctica
Pseudodictyosphaerium jurisii
Unrein, F.
Summer phytoplankton structure and dynamics in an Antarctic lake (Potter Peninsula, South Shetland Islands)
topic_facet community dynamics
community structure
lake
phytoplankton
summer
Antarctica
Pseudodictyosphaerium jurisii
description Summer phytoplankton structure and dynamics in an Antarctic lake (Potter Peninsula, South Shetland Islands): The structure and dynamics of the phytoplankton community of a lake from Potter Peninsula (SSSI No 13, South Shetland Islands) were analyzed during the 1995-1996 summer together with the main limnological features of this system. The surface of the water body was partially covered by ice (60%) at the beginning of the study. Important changes in the abiotic parameters and in the phytoplankton composition were observed during the melting process. Temperature, pH, conductivity and phytoplankton density and biomass increased during the ice-free period. Chlorophyll-a values were typical of oligo-mesotrophic lakes. SRP (soluble reactive phosphorus) values were always lower than 4 μg/L, while TP (total phosphorus) concentration fluctuated around 16 μg/L. Chlorophyta and Bacillariophyceae were the dominant groups in terms of density, biomass and species richness. Pseudodictyosphaerium jurisii (Hind.) Hind. (Chlorococcal) was the dominant species. A decrease in species equitability and diversity was observed as a consequence of the high density achieved by this species during the end of February. Other planktonic taxa of Chlorophyta were also present in low number. Bacillariophyceae, mainly represented by tychoplanktonic species, showed a small peak just at the final phase of ice thawing. Thus, an increase in species richness and diversity and a decrease in the similarity index (SIMI) applied to consecutives samples were observed during this period.
format JOUR
author Unrein, F.
author_facet Unrein, F.
author_sort Unrein, F.
title Summer phytoplankton structure and dynamics in an Antarctic lake (Potter Peninsula, South Shetland Islands)
title_short Summer phytoplankton structure and dynamics in an Antarctic lake (Potter Peninsula, South Shetland Islands)
title_full Summer phytoplankton structure and dynamics in an Antarctic lake (Potter Peninsula, South Shetland Islands)
title_fullStr Summer phytoplankton structure and dynamics in an Antarctic lake (Potter Peninsula, South Shetland Islands)
title_full_unstemmed Summer phytoplankton structure and dynamics in an Antarctic lake (Potter Peninsula, South Shetland Islands)
title_sort summer phytoplankton structure and dynamics in an antarctic lake (potter peninsula, south shetland islands)
url http://hdl.handle.net/20.500.12110/paper_03275477_v10_n2_p169_Unrein
work_keys_str_mv AT unreinf summerphytoplanktonstructureanddynamicsinanantarcticlakepotterpeninsulasouthshetlandislands
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