Diversity and assembly processes of microbial eukaryotic communities in Fildes Peninsula Lakes (West Antarctica)
The diversity, co-occurrence patterns, and assembly processes of microbial eukaryotes (0.2–20 µ m) in Antarctic freshwater lakes are not well understood, despite their wide distribution and ecological importance. This study used Illumina high-throughput sequencing to investigate the microbial eukary...
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ftdoajarticles:oai:doaj.org/article:8232b8d313c643119a8c1616b0a2b0cf 2023-05-15T13:34:52+02:00 Diversity and assembly processes of microbial eukaryotic communities in Fildes Peninsula Lakes (West Antarctica) C. Zhang H. Li Y. Zeng H. Ding B. Wang Y. Li Z. Ji Y. Bi W. Luo 2022-09-01T00:00:00Z https://doi.org/10.5194/bg-19-4639-2022 https://doaj.org/article/8232b8d313c643119a8c1616b0a2b0cf EN eng Copernicus Publications https://bg.copernicus.org/articles/19/4639/2022/bg-19-4639-2022.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-19-4639-2022 1726-4170 1726-4189 https://doaj.org/article/8232b8d313c643119a8c1616b0a2b0cf Biogeosciences, Vol 19, Pp 4639-4654 (2022) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2022 ftdoajarticles https://doi.org/10.5194/bg-19-4639-2022 2022-12-30T19:57:20Z The diversity, co-occurrence patterns, and assembly processes of microbial eukaryotes (0.2–20 µ m) in Antarctic freshwater lakes are not well understood, despite their wide distribution and ecological importance. This study used Illumina high-throughput sequencing to investigate the microbial eukaryotic communities of five freshwater lakes on the Fildes Peninsula over three summer seasons. A total of 28 phyla were detected, with phytoplankton occupying the highest percentage of sequences (accounting for up to 98 %). The dominant taxa consisted of Chrysophyta, Chlorophyta, and Cryptophyta. The species richness (113–268) and Shannon index (1.70–3.50) varied among the lakes, with higher values recorded in Lake Chang Hu and Lake Kitec and the lowest value obtained for Lake Yue Ya. There were significant differences between the microbial eukaryotic communities of the lakes, with spatial and temporal heterogeneity in the relative abundance of the dominant taxa ( P <0.05 ). Environmental variables explained about 39 % of the variation in community structures, with water temperature and phosphate identified as the driving factors ( P <0.05 ). Network analysis revealed comprehensive co-occurrence relationships (positive correlation 82 % vs. negative correlation 18 %). The neutral community model revealed that neutral processes explained more than 55 % of the community variation. Stochastic processes (e.g. homogenizing dispersal and undominated processes) predominated in community assembly over the deterministic processes. These findings demonstrate the diversity of the microbial eukaryotic communities in the freshwater lakes of the Fildes Peninsula and have important implications for understanding the community assembly in these ecosystems. Article in Journal/Newspaper Antarc* Antarctic Antarctica West Antarctica Directory of Open Access Journals: DOAJ Articles Antarctic West Antarctica Fildes ENVELOPE(-58.817,-58.817,-62.217,-62.217) Fildes peninsula ENVELOPE(-58.948,-58.948,-62.182,-62.182) Biogeosciences 19 18 4639 4654 |
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Directory of Open Access Journals: DOAJ Articles |
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English |
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Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
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Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 C. Zhang H. Li Y. Zeng H. Ding B. Wang Y. Li Z. Ji Y. Bi W. Luo Diversity and assembly processes of microbial eukaryotic communities in Fildes Peninsula Lakes (West Antarctica) |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
The diversity, co-occurrence patterns, and assembly processes of microbial eukaryotes (0.2–20 µ m) in Antarctic freshwater lakes are not well understood, despite their wide distribution and ecological importance. This study used Illumina high-throughput sequencing to investigate the microbial eukaryotic communities of five freshwater lakes on the Fildes Peninsula over three summer seasons. A total of 28 phyla were detected, with phytoplankton occupying the highest percentage of sequences (accounting for up to 98 %). The dominant taxa consisted of Chrysophyta, Chlorophyta, and Cryptophyta. The species richness (113–268) and Shannon index (1.70–3.50) varied among the lakes, with higher values recorded in Lake Chang Hu and Lake Kitec and the lowest value obtained for Lake Yue Ya. There were significant differences between the microbial eukaryotic communities of the lakes, with spatial and temporal heterogeneity in the relative abundance of the dominant taxa ( P <0.05 ). Environmental variables explained about 39 % of the variation in community structures, with water temperature and phosphate identified as the driving factors ( P <0.05 ). Network analysis revealed comprehensive co-occurrence relationships (positive correlation 82 % vs. negative correlation 18 %). The neutral community model revealed that neutral processes explained more than 55 % of the community variation. Stochastic processes (e.g. homogenizing dispersal and undominated processes) predominated in community assembly over the deterministic processes. These findings demonstrate the diversity of the microbial eukaryotic communities in the freshwater lakes of the Fildes Peninsula and have important implications for understanding the community assembly in these ecosystems. |
format |
Article in Journal/Newspaper |
author |
C. Zhang H. Li Y. Zeng H. Ding B. Wang Y. Li Z. Ji Y. Bi W. Luo |
author_facet |
C. Zhang H. Li Y. Zeng H. Ding B. Wang Y. Li Z. Ji Y. Bi W. Luo |
author_sort |
C. Zhang |
title |
Diversity and assembly processes of microbial eukaryotic communities in Fildes Peninsula Lakes (West Antarctica) |
title_short |
Diversity and assembly processes of microbial eukaryotic communities in Fildes Peninsula Lakes (West Antarctica) |
title_full |
Diversity and assembly processes of microbial eukaryotic communities in Fildes Peninsula Lakes (West Antarctica) |
title_fullStr |
Diversity and assembly processes of microbial eukaryotic communities in Fildes Peninsula Lakes (West Antarctica) |
title_full_unstemmed |
Diversity and assembly processes of microbial eukaryotic communities in Fildes Peninsula Lakes (West Antarctica) |
title_sort |
diversity and assembly processes of microbial eukaryotic communities in fildes peninsula lakes (west antarctica) |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/bg-19-4639-2022 https://doaj.org/article/8232b8d313c643119a8c1616b0a2b0cf |
long_lat |
ENVELOPE(-58.817,-58.817,-62.217,-62.217) ENVELOPE(-58.948,-58.948,-62.182,-62.182) |
geographic |
Antarctic West Antarctica Fildes Fildes peninsula |
geographic_facet |
Antarctic West Antarctica Fildes Fildes peninsula |
genre |
Antarc* Antarctic Antarctica West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica West Antarctica |
op_source |
Biogeosciences, Vol 19, Pp 4639-4654 (2022) |
op_relation |
https://bg.copernicus.org/articles/19/4639/2022/bg-19-4639-2022.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-19-4639-2022 1726-4170 1726-4189 https://doaj.org/article/8232b8d313c643119a8c1616b0a2b0cf |
op_doi |
https://doi.org/10.5194/bg-19-4639-2022 |
container_title |
Biogeosciences |
container_volume |
19 |
container_issue |
18 |
container_start_page |
4639 |
op_container_end_page |
4654 |
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1766058720504053760 |