Cargando…

Vertical variations in microbial diversity, composition, and interactions in freshwater lake sediments on the Tibetan plateau

Microbial communities in freshwater lake sediments exhibit a distinct depth-dependent variability. Further exploration is required to understand their biodiversity pattern and microbial interactions in vertical sediments. In this study, sediment cores from two freshwater lakes, Mugecuo (MGC) and Cuo...

Descripción completa

Detalles Bibliográficos
Autores principales: Zhu, Xinshu, Deng, Yongcui, Huang, Tao, Han, Cheng, Chen, Lei, Zhang, Zhigang, Liu, Keshao, Liu, Yongqin, Huang, Changchun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10031068/
https://www.ncbi.nlm.nih.gov/pubmed/36970704
http://dx.doi.org/10.3389/fmicb.2023.1118892
_version_ 1784910521354420224
author Zhu, Xinshu
Deng, Yongcui
Huang, Tao
Han, Cheng
Chen, Lei
Zhang, Zhigang
Liu, Keshao
Liu, Yongqin
Huang, Changchun
author_facet Zhu, Xinshu
Deng, Yongcui
Huang, Tao
Han, Cheng
Chen, Lei
Zhang, Zhigang
Liu, Keshao
Liu, Yongqin
Huang, Changchun
author_sort Zhu, Xinshu
collection PubMed
description Microbial communities in freshwater lake sediments exhibit a distinct depth-dependent variability. Further exploration is required to understand their biodiversity pattern and microbial interactions in vertical sediments. In this study, sediment cores from two freshwater lakes, Mugecuo (MGC) and Cuopu (CP), on the Tibetan plateau were sampled and subsequently sliced into layers at a depth of every centimeter or half a centimeter. Amplicon sequencing was used to analyze the composition, diversity, and interaction of microbial communities. Results showed that sediment samples of both lakes could be clustered into two groups at a sediment depth of about 20 cm, with obvious shifts in microbial community compositions. In lake MGC, the richness component dominated β-diversity and increased with depth, indicating that the microbial communities in the deep layer of MGC was selected from the surface layer. Conversely, the replacement component dominated β-diversity in CP, implying a high turnover rate in the surface layer and inactive seed banks with a high variety in the deep layer. A co-occurrence network analysis showed that negative microbial interactions were prevalent in the surface layers with high nutrient concentrations, while positive microbial interactions were more common in the deep layers with low nutrient concentrations, suggesting that microbial interactions are influenced by nutrient conditions in the vertical sediments. Additionally, the results highlight the significant contributions of abundant and rare taxa to microbial interactions and vertical fluctuations of β-diversity, respectively. Overall, this work deepens our understanding of patterns of microbial interactions and vertical fluctuation in β-diversity in lake sediment columns, particularly in freshwater lake sediments from the Tibetan plateau.
format Online
Article
Text
id pubmed-10031068
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher Frontiers Media S.A.
record_format MEDLINE/PubMed
spelling pubmed-100310682023-03-23 Vertical variations in microbial diversity, composition, and interactions in freshwater lake sediments on the Tibetan plateau Zhu, Xinshu Deng, Yongcui Huang, Tao Han, Cheng Chen, Lei Zhang, Zhigang Liu, Keshao Liu, Yongqin Huang, Changchun Front Microbiol Microbiology Microbial communities in freshwater lake sediments exhibit a distinct depth-dependent variability. Further exploration is required to understand their biodiversity pattern and microbial interactions in vertical sediments. In this study, sediment cores from two freshwater lakes, Mugecuo (MGC) and Cuopu (CP), on the Tibetan plateau were sampled and subsequently sliced into layers at a depth of every centimeter or half a centimeter. Amplicon sequencing was used to analyze the composition, diversity, and interaction of microbial communities. Results showed that sediment samples of both lakes could be clustered into two groups at a sediment depth of about 20 cm, with obvious shifts in microbial community compositions. In lake MGC, the richness component dominated β-diversity and increased with depth, indicating that the microbial communities in the deep layer of MGC was selected from the surface layer. Conversely, the replacement component dominated β-diversity in CP, implying a high turnover rate in the surface layer and inactive seed banks with a high variety in the deep layer. A co-occurrence network analysis showed that negative microbial interactions were prevalent in the surface layers with high nutrient concentrations, while positive microbial interactions were more common in the deep layers with low nutrient concentrations, suggesting that microbial interactions are influenced by nutrient conditions in the vertical sediments. Additionally, the results highlight the significant contributions of abundant and rare taxa to microbial interactions and vertical fluctuations of β-diversity, respectively. Overall, this work deepens our understanding of patterns of microbial interactions and vertical fluctuation in β-diversity in lake sediment columns, particularly in freshwater lake sediments from the Tibetan plateau. Frontiers Media S.A. 2023-03-08 /pmc/articles/PMC10031068/ /pubmed/36970704 http://dx.doi.org/10.3389/fmicb.2023.1118892 Text en Copyright © 2023 Zhu, Deng, Huang, Han, Chen, Zhang, Liu, Liu and Huang. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Microbiology
Zhu, Xinshu
Deng, Yongcui
Huang, Tao
Han, Cheng
Chen, Lei
Zhang, Zhigang
Liu, Keshao
Liu, Yongqin
Huang, Changchun
Vertical variations in microbial diversity, composition, and interactions in freshwater lake sediments on the Tibetan plateau
title Vertical variations in microbial diversity, composition, and interactions in freshwater lake sediments on the Tibetan plateau
title_full Vertical variations in microbial diversity, composition, and interactions in freshwater lake sediments on the Tibetan plateau
title_fullStr Vertical variations in microbial diversity, composition, and interactions in freshwater lake sediments on the Tibetan plateau
title_full_unstemmed Vertical variations in microbial diversity, composition, and interactions in freshwater lake sediments on the Tibetan plateau
title_short Vertical variations in microbial diversity, composition, and interactions in freshwater lake sediments on the Tibetan plateau
title_sort vertical variations in microbial diversity, composition, and interactions in freshwater lake sediments on the tibetan plateau
topic Microbiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10031068/
https://www.ncbi.nlm.nih.gov/pubmed/36970704
http://dx.doi.org/10.3389/fmicb.2023.1118892
work_keys_str_mv AT zhuxinshu verticalvariationsinmicrobialdiversitycompositionandinteractionsinfreshwaterlakesedimentsonthetibetanplateau
AT dengyongcui verticalvariationsinmicrobialdiversitycompositionandinteractionsinfreshwaterlakesedimentsonthetibetanplateau
AT huangtao verticalvariationsinmicrobialdiversitycompositionandinteractionsinfreshwaterlakesedimentsonthetibetanplateau
AT hancheng verticalvariationsinmicrobialdiversitycompositionandinteractionsinfreshwaterlakesedimentsonthetibetanplateau
AT chenlei verticalvariationsinmicrobialdiversitycompositionandinteractionsinfreshwaterlakesedimentsonthetibetanplateau
AT zhangzhigang verticalvariationsinmicrobialdiversitycompositionandinteractionsinfreshwaterlakesedimentsonthetibetanplateau
AT liukeshao verticalvariationsinmicrobialdiversitycompositionandinteractionsinfreshwaterlakesedimentsonthetibetanplateau
AT liuyongqin verticalvariationsinmicrobialdiversitycompositionandinteractionsinfreshwaterlakesedimentsonthetibetanplateau
AT huangchangchun verticalvariationsinmicrobialdiversitycompositionandinteractionsinfreshwaterlakesedimentsonthetibetanplateau