Cargando…

Contrast diversity patterns and processes of microbial community assembly in a river-lake continuum across a catchment scale in northwestern China

BACKGROUND: Microorganisms in rivers and lakes are essential for nutrient recycling in aquatic ecosystems. Understanding the ecological processes shaping microbial communities is of crucial importance for aquatic microbial ecology and biogeography. However, the diversity of microorganisms and the fo...

Descripción completa

Detalles Bibliográficos
Autores principales: Tang, Xiangming, Xie, Guijuan, Shao, Keqiang, Hu, Yang, Cai, Jian, Bai, Chengrong, Gong, Yi, Gao, Guang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8066441/
https://www.ncbi.nlm.nih.gov/pubmed/33902721
http://dx.doi.org/10.1186/s40793-020-00356-9
_version_ 1783682572293767168
author Tang, Xiangming
Xie, Guijuan
Shao, Keqiang
Hu, Yang
Cai, Jian
Bai, Chengrong
Gong, Yi
Gao, Guang
author_facet Tang, Xiangming
Xie, Guijuan
Shao, Keqiang
Hu, Yang
Cai, Jian
Bai, Chengrong
Gong, Yi
Gao, Guang
author_sort Tang, Xiangming
collection PubMed
description BACKGROUND: Microorganisms in rivers and lakes are essential for nutrient recycling in aquatic ecosystems. Understanding the ecological processes shaping microbial communities is of crucial importance for aquatic microbial ecology and biogeography. However, the diversity of microorganisms and the forces that control this diversity are poorly understood. This is particularly true within the framework of the river-lake continuum in arid regions. RESULTS: Using a whole catchment-sampling effort, we explored biogeographical patterns and mechanisms of microbial community (bacteria and archaea) assembly within the catchment of the largest inland once freshwater lake (Lake Bosten) in China. Water samples from headstream tributaries, the mainstream of the River Kaidu to downstream Lake Bosten were characterized using amplicon sequencing of 16S rRNA genes. Higher α-diversity was found in mainstream of River Kaidu and in the tributaries compared with Lake Bosten. And the microbial community composition was also significantly different between the lake and its connected river habitats. Canonical correspondence analysis demonstrated that salinity and total suspended solids were the most important environmental factors shaping the community variations. Overall, pure environmental and pure spatial factors explained 13.7 and 5.6% of the community variation, respectively, while 32.0% of the variation was explained by combined environmental and spatial variables. These observations suggested that spatially structured environmental variations mainly shaped the microbial biogeography in this region. Both deterministic and stochastic processes influenced the microbial community assembly in river and lake habitats, and the stochastic pattern was particularly pronounced for microbiome in river habitat. Co-occurrence network analysis revealed more abundant and complicated correlations among frequently occurred taxa in lake habitat compared with the river habitat, implying that ecological multispecies interactions (e.g., competition) shaped lake microbial community structures. CONCLUSIONS: Our findings demonstrate an ecological succession along the river-lake continuum of microbial communities across the largest inland once freshwater lake basin in China, and highlight the effects of spatially structured environmental factors on regional microbial β-diversity and species interactions on local community assembly.
format Online
Article
Text
id pubmed-8066441
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher BioMed Central
record_format MEDLINE/PubMed
spelling pubmed-80664412021-04-26 Contrast diversity patterns and processes of microbial community assembly in a river-lake continuum across a catchment scale in northwestern China Tang, Xiangming Xie, Guijuan Shao, Keqiang Hu, Yang Cai, Jian Bai, Chengrong Gong, Yi Gao, Guang Environ Microbiome Research Article BACKGROUND: Microorganisms in rivers and lakes are essential for nutrient recycling in aquatic ecosystems. Understanding the ecological processes shaping microbial communities is of crucial importance for aquatic microbial ecology and biogeography. However, the diversity of microorganisms and the forces that control this diversity are poorly understood. This is particularly true within the framework of the river-lake continuum in arid regions. RESULTS: Using a whole catchment-sampling effort, we explored biogeographical patterns and mechanisms of microbial community (bacteria and archaea) assembly within the catchment of the largest inland once freshwater lake (Lake Bosten) in China. Water samples from headstream tributaries, the mainstream of the River Kaidu to downstream Lake Bosten were characterized using amplicon sequencing of 16S rRNA genes. Higher α-diversity was found in mainstream of River Kaidu and in the tributaries compared with Lake Bosten. And the microbial community composition was also significantly different between the lake and its connected river habitats. Canonical correspondence analysis demonstrated that salinity and total suspended solids were the most important environmental factors shaping the community variations. Overall, pure environmental and pure spatial factors explained 13.7 and 5.6% of the community variation, respectively, while 32.0% of the variation was explained by combined environmental and spatial variables. These observations suggested that spatially structured environmental variations mainly shaped the microbial biogeography in this region. Both deterministic and stochastic processes influenced the microbial community assembly in river and lake habitats, and the stochastic pattern was particularly pronounced for microbiome in river habitat. Co-occurrence network analysis revealed more abundant and complicated correlations among frequently occurred taxa in lake habitat compared with the river habitat, implying that ecological multispecies interactions (e.g., competition) shaped lake microbial community structures. CONCLUSIONS: Our findings demonstrate an ecological succession along the river-lake continuum of microbial communities across the largest inland once freshwater lake basin in China, and highlight the effects of spatially structured environmental factors on regional microbial β-diversity and species interactions on local community assembly. BioMed Central 2020-04-25 /pmc/articles/PMC8066441/ /pubmed/33902721 http://dx.doi.org/10.1186/s40793-020-00356-9 Text en © The Author(s) 2020 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/ (https://creativecommons.org/publicdomain/zero/1.0/) ) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
spellingShingle Research Article
Tang, Xiangming
Xie, Guijuan
Shao, Keqiang
Hu, Yang
Cai, Jian
Bai, Chengrong
Gong, Yi
Gao, Guang
Contrast diversity patterns and processes of microbial community assembly in a river-lake continuum across a catchment scale in northwestern China
title Contrast diversity patterns and processes of microbial community assembly in a river-lake continuum across a catchment scale in northwestern China
title_full Contrast diversity patterns and processes of microbial community assembly in a river-lake continuum across a catchment scale in northwestern China
title_fullStr Contrast diversity patterns and processes of microbial community assembly in a river-lake continuum across a catchment scale in northwestern China
title_full_unstemmed Contrast diversity patterns and processes of microbial community assembly in a river-lake continuum across a catchment scale in northwestern China
title_short Contrast diversity patterns and processes of microbial community assembly in a river-lake continuum across a catchment scale in northwestern China
title_sort contrast diversity patterns and processes of microbial community assembly in a river-lake continuum across a catchment scale in northwestern china
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8066441/
https://www.ncbi.nlm.nih.gov/pubmed/33902721
http://dx.doi.org/10.1186/s40793-020-00356-9
work_keys_str_mv AT tangxiangming contrastdiversitypatternsandprocessesofmicrobialcommunityassemblyinariverlakecontinuumacrossacatchmentscaleinnorthwesternchina
AT xieguijuan contrastdiversitypatternsandprocessesofmicrobialcommunityassemblyinariverlakecontinuumacrossacatchmentscaleinnorthwesternchina
AT shaokeqiang contrastdiversitypatternsandprocessesofmicrobialcommunityassemblyinariverlakecontinuumacrossacatchmentscaleinnorthwesternchina
AT huyang contrastdiversitypatternsandprocessesofmicrobialcommunityassemblyinariverlakecontinuumacrossacatchmentscaleinnorthwesternchina
AT caijian contrastdiversitypatternsandprocessesofmicrobialcommunityassemblyinariverlakecontinuumacrossacatchmentscaleinnorthwesternchina
AT baichengrong contrastdiversitypatternsandprocessesofmicrobialcommunityassemblyinariverlakecontinuumacrossacatchmentscaleinnorthwesternchina
AT gongyi contrastdiversitypatternsandprocessesofmicrobialcommunityassemblyinariverlakecontinuumacrossacatchmentscaleinnorthwesternchina
AT gaoguang contrastdiversitypatternsandprocessesofmicrobialcommunityassemblyinariverlakecontinuumacrossacatchmentscaleinnorthwesternchina