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Factors influencing the pigment composition and dynamics of photoautotrophic picoplankton in shallow eutrophic lakes

Photoautotrophic picoplankton (0.2–2 μm) can be a major contributor to primary production and play a significant part in the ecosystem carbon flow. However, the understanding about the dynamics of both eukaryotic and prokaryotic components of picoplankton in shallow eutrophic freshwater environments...

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Autores principales: Tamm, Marju, Nõges, Tiina, Nõges, Peeter, Panksep, Kristel, Zingel, Priit, Agasild, Helen, Freiberg, Rene, Hunt, Triin, Tõnno, Ilmar
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9135284/
https://www.ncbi.nlm.nih.gov/pubmed/35617295
http://dx.doi.org/10.1371/journal.pone.0267133
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author Tamm, Marju
Nõges, Tiina
Nõges, Peeter
Panksep, Kristel
Zingel, Priit
Agasild, Helen
Freiberg, Rene
Hunt, Triin
Tõnno, Ilmar
author_facet Tamm, Marju
Nõges, Tiina
Nõges, Peeter
Panksep, Kristel
Zingel, Priit
Agasild, Helen
Freiberg, Rene
Hunt, Triin
Tõnno, Ilmar
author_sort Tamm, Marju
collection PubMed
description Photoautotrophic picoplankton (0.2–2 μm) can be a major contributor to primary production and play a significant part in the ecosystem carbon flow. However, the understanding about the dynamics of both eukaryotic and prokaryotic components of picoplankton in shallow eutrophic freshwater environments is still poor. Very few studies in these ecosystems reveal the taxonomic composition of picoeukaryotes. The main objective of this study was to investigate the seasonal dynamics of phototrophic picoplankton with the emphasis on the eukaryote community composition in a large shallow, eutrophic lake of the northern temperate zone (Lake Võrtsjärv). Phytoplankton pigments were employed to determine the taxonomic composition of photoautotrophic picoplankton. We found out that photoautotrophic picoplankton constitutes an important part of the phytoplankton community in Lake Võrtsjärv and its contribution can be highly variable (from ~9.3% to ~39%) in different years. The eukaryotic photoautotrophic picoplankton was dominated by diatoms followed by chrysophytes and other minor groups. Picoeukaryotes were prevailing in low-light conditions and low temperatures as their predominance in the picoplankton community was tightly linked to the presence or absence of ice cover. Ice cover strongly suppressed the growth of picocyanobacteria. Total phosphorus, turbidity and metazooplankton abundance had a clear relationship with photoautotrophic picoplankton chlorophyll a.
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spelling pubmed-91352842022-05-27 Factors influencing the pigment composition and dynamics of photoautotrophic picoplankton in shallow eutrophic lakes Tamm, Marju Nõges, Tiina Nõges, Peeter Panksep, Kristel Zingel, Priit Agasild, Helen Freiberg, Rene Hunt, Triin Tõnno, Ilmar PLoS One Research Article Photoautotrophic picoplankton (0.2–2 μm) can be a major contributor to primary production and play a significant part in the ecosystem carbon flow. However, the understanding about the dynamics of both eukaryotic and prokaryotic components of picoplankton in shallow eutrophic freshwater environments is still poor. Very few studies in these ecosystems reveal the taxonomic composition of picoeukaryotes. The main objective of this study was to investigate the seasonal dynamics of phototrophic picoplankton with the emphasis on the eukaryote community composition in a large shallow, eutrophic lake of the northern temperate zone (Lake Võrtsjärv). Phytoplankton pigments were employed to determine the taxonomic composition of photoautotrophic picoplankton. We found out that photoautotrophic picoplankton constitutes an important part of the phytoplankton community in Lake Võrtsjärv and its contribution can be highly variable (from ~9.3% to ~39%) in different years. The eukaryotic photoautotrophic picoplankton was dominated by diatoms followed by chrysophytes and other minor groups. Picoeukaryotes were prevailing in low-light conditions and low temperatures as their predominance in the picoplankton community was tightly linked to the presence or absence of ice cover. Ice cover strongly suppressed the growth of picocyanobacteria. Total phosphorus, turbidity and metazooplankton abundance had a clear relationship with photoautotrophic picoplankton chlorophyll a. Public Library of Science 2022-05-26 /pmc/articles/PMC9135284/ /pubmed/35617295 http://dx.doi.org/10.1371/journal.pone.0267133 Text en © 2022 Tamm et al https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Tamm, Marju
Nõges, Tiina
Nõges, Peeter
Panksep, Kristel
Zingel, Priit
Agasild, Helen
Freiberg, Rene
Hunt, Triin
Tõnno, Ilmar
Factors influencing the pigment composition and dynamics of photoautotrophic picoplankton in shallow eutrophic lakes
title Factors influencing the pigment composition and dynamics of photoautotrophic picoplankton in shallow eutrophic lakes
title_full Factors influencing the pigment composition and dynamics of photoautotrophic picoplankton in shallow eutrophic lakes
title_fullStr Factors influencing the pigment composition and dynamics of photoautotrophic picoplankton in shallow eutrophic lakes
title_full_unstemmed Factors influencing the pigment composition and dynamics of photoautotrophic picoplankton in shallow eutrophic lakes
title_short Factors influencing the pigment composition and dynamics of photoautotrophic picoplankton in shallow eutrophic lakes
title_sort factors influencing the pigment composition and dynamics of photoautotrophic picoplankton in shallow eutrophic lakes
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9135284/
https://www.ncbi.nlm.nih.gov/pubmed/35617295
http://dx.doi.org/10.1371/journal.pone.0267133
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