Diversity of Microbial Eukaryotes Along the West Antarctic Peninsula in Austral Spring
During a cruise from October to November 2019, along the West Antarctic Peninsula, between 64.32 and 68.37°S, we assessed the diversity and composition of the active microbial eukaryotic community within three size fractions: micro- (> 20 μm), nano- (20–5 μm), and pico-size fractions (5–0.2 μ...
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crfrontiers:10.3389/fmicb.2022.844856 2024-09-15T17:46:30+00:00 Diversity of Microbial Eukaryotes Along the West Antarctic Peninsula in Austral Spring Grattepanche, Jean-David Jeffrey, Wade H. Gast, Rebecca J. Sanders, Robert W. Division of Antarctic Sciences 2022 http://dx.doi.org/10.3389/fmicb.2022.844856 https://www.frontiersin.org/articles/10.3389/fmicb.2022.844856/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Microbiology volume 13 ISSN 1664-302X journal-article 2022 crfrontiers https://doi.org/10.3389/fmicb.2022.844856 2024-08-13T04:05:37Z During a cruise from October to November 2019, along the West Antarctic Peninsula, between 64.32 and 68.37°S, we assessed the diversity and composition of the active microbial eukaryotic community within three size fractions: micro- (> 20 μm), nano- (20–5 μm), and pico-size fractions (5–0.2 μm). The communities and the environmental parameters displayed latitudinal gradients, and we observed a strong similarity in the microbial eukaryotic communities as well as the environmental parameters between the sub-surface and the deep chlorophyll maximum (DCM) depths. Chlorophyll concentrations were low, and the mixed layer was shallow for most of the 17 stations sampled. The richness of the microplankton was higher in Marguerite Bay (our southernmost stations), compared to more northern stations, while the diversity for the nano- and pico-plankton was relatively stable across latitude. The microplankton communities were dominated by autotrophs, mostly diatoms, while mixotrophs (phototrophs-consuming bacteria and kleptoplastidic ciliates, mostly alveolates, and cryptophytes) were the most abundant and active members of the nano- and picoplankton communities. While phototrophy was the dominant trophic mode, heterotrophy (mixotrophy, phagotrophy, and parasitism) tended to increase southward. The samples from Marguerite Bay showed a distinct community with a high diversity of nanoplankton predators, including spirotrich ciliates, and dinoflagellates, while cryptophytes were observed elsewhere. Some lineages were significantly related—either positively or negatively—to ice coverage (e.g., positive for Pelagophyceae, negative for Spirotrichea) and temperature (e.g., positive for Cryptophyceae, negative for Spirotrichea). This suggests that climate changes will have a strong impact on the microbial eukaryotic community. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Frontiers (Publisher) Frontiers in Microbiology 13 |
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During a cruise from October to November 2019, along the West Antarctic Peninsula, between 64.32 and 68.37°S, we assessed the diversity and composition of the active microbial eukaryotic community within three size fractions: micro- (> 20 μm), nano- (20–5 μm), and pico-size fractions (5–0.2 μm). The communities and the environmental parameters displayed latitudinal gradients, and we observed a strong similarity in the microbial eukaryotic communities as well as the environmental parameters between the sub-surface and the deep chlorophyll maximum (DCM) depths. Chlorophyll concentrations were low, and the mixed layer was shallow for most of the 17 stations sampled. The richness of the microplankton was higher in Marguerite Bay (our southernmost stations), compared to more northern stations, while the diversity for the nano- and pico-plankton was relatively stable across latitude. The microplankton communities were dominated by autotrophs, mostly diatoms, while mixotrophs (phototrophs-consuming bacteria and kleptoplastidic ciliates, mostly alveolates, and cryptophytes) were the most abundant and active members of the nano- and picoplankton communities. While phototrophy was the dominant trophic mode, heterotrophy (mixotrophy, phagotrophy, and parasitism) tended to increase southward. The samples from Marguerite Bay showed a distinct community with a high diversity of nanoplankton predators, including spirotrich ciliates, and dinoflagellates, while cryptophytes were observed elsewhere. Some lineages were significantly related—either positively or negatively—to ice coverage (e.g., positive for Pelagophyceae, negative for Spirotrichea) and temperature (e.g., positive for Cryptophyceae, negative for Spirotrichea). This suggests that climate changes will have a strong impact on the microbial eukaryotic community. |
author2 |
Division of Antarctic Sciences |
format |
Article in Journal/Newspaper |
author |
Grattepanche, Jean-David Jeffrey, Wade H. Gast, Rebecca J. Sanders, Robert W. |
spellingShingle |
Grattepanche, Jean-David Jeffrey, Wade H. Gast, Rebecca J. Sanders, Robert W. Diversity of Microbial Eukaryotes Along the West Antarctic Peninsula in Austral Spring |
author_facet |
Grattepanche, Jean-David Jeffrey, Wade H. Gast, Rebecca J. Sanders, Robert W. |
author_sort |
Grattepanche, Jean-David |
title |
Diversity of Microbial Eukaryotes Along the West Antarctic Peninsula in Austral Spring |
title_short |
Diversity of Microbial Eukaryotes Along the West Antarctic Peninsula in Austral Spring |
title_full |
Diversity of Microbial Eukaryotes Along the West Antarctic Peninsula in Austral Spring |
title_fullStr |
Diversity of Microbial Eukaryotes Along the West Antarctic Peninsula in Austral Spring |
title_full_unstemmed |
Diversity of Microbial Eukaryotes Along the West Antarctic Peninsula in Austral Spring |
title_sort |
diversity of microbial eukaryotes along the west antarctic peninsula in austral spring |
publisher |
Frontiers Media SA |
publishDate |
2022 |
url |
http://dx.doi.org/10.3389/fmicb.2022.844856 https://www.frontiersin.org/articles/10.3389/fmicb.2022.844856/full |
genre |
Antarc* Antarctic Antarctic Peninsula |
genre_facet |
Antarc* Antarctic Antarctic Peninsula |
op_source |
Frontiers in Microbiology volume 13 ISSN 1664-302X |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/fmicb.2022.844856 |
container_title |
Frontiers in Microbiology |
container_volume |
13 |
_version_ |
1810494698024861696 |