Large‐scale distribution of bacterial communities in the Qaidam Basin of the Qinghai–Tibet Plateau

Xing, Rui; Gao, Qingbo; Zhang, Faqi; Wang, Jiuli; Chen, Shilong

doi:10.1002/mbo3.909

Cited by 20 publications

(29 citation statements)

References 41 publications

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“…The surface soil samples had higher α-diversity indices (Chao, Shannon, and Simpson) ( Supplementary Table 1 and Figure 2), the highest modularity index in the co-occurrence network, and the largest number of biomarker taxa. The level of diversity in this study indicates a more complex ecosystem in the Qaidam Basin than previously reported by Xing et al (2019). The present data showed that the view based on soil analyses indicate that bacterial phyla such as Firmicutes, Proteobacteria, FIGURE 6 | The potential biomarker was defined by LEfSe.…”

Section: Bacterial Diversity In the Qaidam Basinsupporting

confidence: 52%

“…change effects are most pronounced in desert regions and as there could be increases in localized cooling in the Qaidam Basin (Xing et al, 2019), it is timely to explore this endangered environment.…”

Section: Discussionmentioning

confidence: 99%

“…Our multivariate permutation analysis indicated that TN, TOC, and WC were the major driving factors shaping the bacterial community structures (Supplementary Table 2). Several studies have found that the soil bacterial communities are strongly shaped by soil properties, such as pH, TOC, Mg 2+ , and WC (Fierer et al, 2003;Chu et al, 2010;Xing et al, 2019). In particular, soil pH has been previously identified as a key factor influencing bacterial community structure (Fierer and Jackson, 2006;Lauber et al, 2009).…”

Section: Effects Of Environmental Factors On Bacterial Community Strumentioning

confidence: 99%

“…An in-depth exploration of soil bacterial diversity in the cold desert habitats of the Qaidam Basin region will not only improve our knowledge of bacterial ecology under extreme stresses but also provide insights into the potential effects of environmental changes in this endangered region (Xing et al, 2019). The Qaidam Basin is the main high-altitude cold desert in China, and it is thermally unstable and is ecologically sensitive to climate change (Dai, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…The Qaidam Basin is the main high-altitude cold desert in China, and it is thermally unstable and is ecologically sensitive to climate change (Dai, 2012). The environmental stresses are highly pronounced in this region; in particular, due to the extremely cold environment, soil nutrient availability is limited (Han et al, 2017;Xing et al, 2019). The west region is higher than the east region, and the high-elevation region tends to be higher still and has fewer passes through which the wind can travel from west to east (Li et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Diverse Bacterial Communities From Qaidam Basin of the Qinghai–Tibet Plateau: Insights Into Variations in Bacterial Diversity Across Different Regions

et al. 2020

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The Qaidam Basin of the Qinghai-Tibet Plateau is a cold, hyper-arid desert that presents extreme challenges to microbial communities. As little is known about variations between surface and subsurface microbial communities, high-throughput DNA sequencing was used in this study to profile bacterial communities of the soil samples collected at different depths in three regions in the Qaidam Basin. The α-diversity indices (Chao, Shannon, and Simpson) indicated that bacterial abundance and diversity were higher in the east and the high-elevation regions compared to the west region. In general, Firmicutes was dominant in the west region, while Proteobacteria and Acidobacteria were dominant in the east and the high-elevation regions. The structure of the bacterial communities differed greatly across regions, being strongly correlated with total organic carbon (TOC) and total nitrogen (TN) content. The differences in bacterial communities between the surface and the subsurface soil samples were smaller than the differences across the regions. Network analyses of environmental factors and bacterial genera indicated significant positive correlations in all regions. Overall, our study provides evidence that TOC and TN are the best predictors of both surface and subsurface bacterial communities across the Qaidam Basin. This study concludes that the bacterial community structure is influenced by both the spatial distance and the local environment, but environmental factors are the primary drivers of bacterial spatial patterns in the Qaidam Basin.

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Section: Bacterial Diversity In the Qaidam Basinsupporting

confidence: 52%

Section: Discussionmentioning

confidence: 99%

Section: Effects Of Environmental Factors On Bacterial Community Strumentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Diverse Bacterial Communities From Qaidam Basin of the Qinghai–Tibet Plateau: Insights Into Variations in Bacterial Diversity Across Different Regions

et al. 2020

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Biogeography and assembly processes of abundant and rare soil microbial taxa in the southern part of the Qilian Mountain National Park, China

Feng,

Li,

Deng

et al. 2024

Ecology and Evolution

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Soil microorganisms play vital roles in regulating multiple ecosystem functions. Recent studies have revealed that the rare microbial taxa (with extremely low relative abundances, which are still largely ignored) are also crucial in maintaining the health and biodiversity of the soil and may respond differently to environmental pressure. However, little is known about the soil community structures of abundant and rare taxa and their assembly processes in different soil layers on the Qinghai‐Tibet Plateau (QTP). The present study investigated the community structure and assembly processes of soil abundant and rare microbial taxa on the northeastern edge of the QTP. Soil microbial abundance was defined by abundant taxa, whereas rare taxa contributed to soil microbial diversity. The results of null model show that the stochastic process ruled the assembly processes of all sub‐communities. Dispersal limitation contributed more to the assembly of abundant microbial taxa in the different soil layers. In contrast, drift played a more critical role in the assembly processes of the rare microbial taxa. In addition, in contrast to previous studies, the abundant taxa played more important roles in co‐occurrence networks, most likely because of the heterogeneity of the soil, the sparsity of amplicon sequencing, the sampling strategy, and the limited samples in the present study. The results of this study improve our understanding of soil microbiome assemblies on the QTP and highlight the role of abundant taxa in sustaining the stability of microbial co‐occurrence networks in different soil layers.

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Distinguishing the effects of micro‐ and macro‐habitats on plant‐associated microbiomes in the Qinghai‐Tibetan Qaidam Basin

Lai,

Liu,

Deng

et al. 2024

Land Degrad Dev

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Although microbiomes associated with plants and the environment are intricately intertwined, it remains unclear how various environmental scales affect these relationships differently. We employed high‐throughput amplicon sequencing to examine the plant‐associated bacterial and fungal communities across three different micro‐habitats (leaf, root, and root zone soil) in 16 shrubs distributed across a >500 km transect of the eastern Qinghai‐Tibetan Qaidam Basin. Among the three microhabitats, the diversity and composition of plant‐associated bacterial and fungal communities differed significantly. Although micro‐habitats play a crucial role in shaping plant‐associated microbial communities, geographic and climatic variables largely influenced the community compositions across the three micro‐habitats. Notably, the microbial communities in all three micro‐habitats showed significant distance‐decay patterns. Furthermore, fungi exhibited less variation across the three microenvironments, and were more sensitive to environmental changes than bacteria. Moreover, microbiome complexity and stochasticity gradually increased from soils to roots and finally to leaves. The microbial communities in soils and epiphytes (leaves and roots) were predominantly shaped by determinism and stochasticity, respectively. These results highlight that plant‐associated microbiomes are primarily shaped by the microenvironments associated with plants; however, their compositions, dynamics, and assembly are further influenced by geographic and climatic factors. Overall, our findings greatly increase our understanding of the intricate dynamics between plant‐associated microbiomes and their surrounding environment in drylands. This knowledge contributes to ongoing research on microbial ecology and provides substantial supports for the precise evaluation of desert ecosystem function. The findings are helpful for biodiversity conservation and sustainable management of desert shrublands.

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Large‐scale distribution of bacterial communities in the Qaidam Basin of the Qinghai–Tibet Plateau

Cited by 20 publications

References 41 publications

Diverse Bacterial Communities From Qaidam Basin of the Qinghai–Tibet Plateau: Insights Into Variations in Bacterial Diversity Across Different Regions

Diverse Bacterial Communities From Qaidam Basin of the Qinghai–Tibet Plateau: Insights Into Variations in Bacterial Diversity Across Different Regions

Biogeography and assembly processes of abundant and rare soil microbial taxa in the southern part of the Qilian Mountain National Park, China

Distinguishing the effects of micro‐ and macro‐habitats on plant‐associated microbiomes in the Qinghai‐Tibetan Qaidam Basin

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