Responses of soil bacterial communities to precipitation change in the semi-arid alpine grassland of Northern Tibet

Yan, Yan; Lü, Xianguo; Fu, Lijiao; Liu, Yanling

doi:10.3389/fpls.2022.1036369

Cited by 8 publications

(5 citation statements)

References 126 publications

(139 reference statements)

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“…This indicates that more temperature and less precipitation were conducive for fostering phyllosphere microbial network complexity in an appropriate range. Work (Li et al, 2022c) also demonstrated that less precipitation could strengthen the interactions and cooperation between co-occurring microbial functional taxa, possibly due to greater bacterial separation and reduced competition between bacterial species under conditions of little precipitation (Treves et al, 2003). Previous studies also affirmed that appropriately higher temperatures could intensify both the network connectivity and complexity of microbial communities to improve the cooperation between member microbes to defend the impaired ecosystem functions (Yuan et al, 2021;Xing et al, 2022).…”

Section: Discussionmentioning

confidence: 92%

“…Aydogan et al (2018) stated that warm temperature could strongly adjust the phyllosphere microbial communities by affecting critical microbial taxa. Another study also found that climatic factors could indirectly impact the composition of phyllosphere bacterial community by modulating bacterial interactions (Li et al, 2022c). It is almost certain that local changes in climate could have an impact on the ecosystem functioning of the phyllosphere microbiome given the narrow climatic endurance of its key microbial taxa (Xing et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

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Differentiated responses of the phyllosphere bacterial community of the yellowhorn tree to precipitation and temperature regimes across Northern China

Wang,

Hu,

Chang

et al. 2023

Front. Plant Sci.

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IntroductionAs an ephemeral and oligotrophic environment, the phyllosphere harbors many highly diverse microorganisms. Importantly, it is known that their colonization of plant leaf surfaces is considerably influenced by a few abiotic factors related to climatic conditions. Yet how the dynamics of phyllosphere bacterial community assembly are shaped by detailed climatological elements, such as various bioclimatic variables, remains poorly understood.MethodsUsing high-throughput 16S rRNA gene amplicon sequencing technology, we analyzed the bacterial communities inhabiting the leaf surfaces of an oilseed tree, yellowhorn (Xanthoceras sorbifolium), grown at four sites (Yinchuan, Otogqianqi, Tongliao, and Zhangwu) whose climatic status differs in northern China.Results and DiscussionWe found that the yellowhorn phyllosphere’s bacterial community was generally dominated by four phyla: Proteobacteria, Firmicutes, Actinobacteria, and Bacteroidetes. Nevertheless, bacterial community composition differed significantly among the four sampled site regions, indicating the possible impact of climatological factors upon the phyllosphere microbiome. Interestingly, we also noted that the α-diversities of phyllosphere microbiota showed strong positive or negative correlation with 13 bioclimatic factors (including 7 precipitation factors and 6 temperature factors). Furthermore, the relative abundances of 55 amplicon sequence variants (ASVs), including three ASVs representing two keystone taxa (the genera Curtobacterium and Streptomyces), exhibited significant yet contrary responses to the precipitation and temperature climatic variables. That pattern was consistent with all ASVs’ trends of possessing opposite correlations to those two parameter classes. In addition, the total number of links and nodes, which conveys community network complexity, increased with rising values of most temperature variables. Besides that, remarkably positive relevance was found between average clustering coefficient and most precipitation variables. Altogether, these results suggest the yellowhorn phyllosphere bacterial community is capable of responding to variation in rainfall and temperature regimes in distinctive ways.

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Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Differentiated responses of the phyllosphere bacterial community of the yellowhorn tree to precipitation and temperature regimes across Northern China

Wang,

Hu,

Chang

et al. 2023

Front. Plant Sci.

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“…Conversely, a reduction of precipitation can decrease soil bacterial diversity (Yang et al, 2021). However, some studies conducted in the desert steppe found that soil bacterial diversity did not significantly change with altered precipitation (Na et al, 2019;Li et al, 2022). This was related to the survival strategies of soil microorganisms in response to altered precipitation.…”

Section: Introductionmentioning

confidence: 97%

“…Plant aboveground biomass, as major resource inputs to soil (De Deyn et al, 2008;Liu et al, 2021), was regarded as a contributor of the bacterial community composition in the SEM (structural equation model) analysis (Na et al, 2019). Second, altered precipitation can regulate the bacterial communities by directly affecting soil physical-chemical properties, such as soil water content (SWC), total phosphorus (TP), soil organic carbon (SOC), and pH (Na et al, 2019;Yang et al, 2021;Li et al, 2022). Broadly speaking, the positive effect of increased precipitation on soil water availability can provide more nutrients and promote their accessibility (Manzoni et al, 2012;Manzoni et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Plant property regulates soil bacterial community structure under altered precipitation regimes in a semi-arid desert grassland, China

et al. 2023

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Variations of precipitation have great impacts on soil carbon cycle and decomposition of soil organic matter. Soil bacteria are crucial participants in regulating these ecological processes and vulnerable to altered precipitation. Studying the impacts of altered precipitation on soil bacterial community structure can provide a novel insight into the potential impacts of altered precipitation on soil carbon cycle and carbon storage of grassland. Therefore, soil bacterial community structure under a precipitation manipulation experiment was researched in a semi-arid desert grassland in Chinese Loess Plateau. Five precipitation levels, i.e., control, reduced and increased precipitation by 40% and 20%, respectively (referred here as CK, DP40, DP20, IP40, and IP20) were set. The results showed that soil bacterial alpha diversity and rare bacteria significantly changed with altered precipitation, but the dominant bacteria and soil bacterial beta diversity did not change, which may be ascribed to the ecological strategy of soil bacteria. The linear discriminate analysis (LDA) effect size (LEfSe) method found that major response patterns of soil bacteria to altered precipitation were resource-limited and drought-tolerant populations. In addition, increasing precipitation greatly promoted inter-species competition, while decreasing precipitation highly facilitated inter-species cooperation. These changes in species interaction can promote different distribution ratios of bacterial populations under different precipitation conditions. In structural equation model (SEM) analysis, with changes in precipitation, plant growth characteristics were found to be drivers of soil bacterial community composition, while soil properties were not. In conclusion, our results indicated that in desert grassland ecosystem, the sensitive of soil rare bacteria to altered precipitation was stronger than that of dominant taxa, which may be related to the ecological strategy of bacteria, species interaction, and precipitation-induced variations of plant growth characteristics.

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“…Global changes are directly or indirectly altering grassland vegetation and soil microbial community. Precipitation is regarded as one of the most important factors that change the composition of vegetation and soil microbial community in the grassland ecosystem, and numerous studies have been conducted on the effects of precipitation on soil microbial community (Li, Yan, et al, 2022; Zhang et al, 2016; Zhou et al, 2018), but the results were not consistent. Li, Chang, et al (2022) indicated that the α‐diversity index of the soil microbial community showed no significant differences under seven precipitation gradients, but another study suggested that increasing rainfall reduced the relative abundance of dominant soil bacterial community (Zhang et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Response of soil microbial α‐diversity to grazing in grassland ecosystems: A meta‐analysis

Yang,

Song,

Hou

et al. 2023

Land Degrad Dev

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Grazing is one of the most important forms of terrestrial use, and the soil microbial community plays an important role in nutrient cycling and biodiversity maintenance of grazing grassland, but the response of soil bacterial and fungal communities α‐diversity to grazing and the potential mechanisms of grazing‐induced soil microbial change have not been well synthesized. We conducted a meta‐analysis of 87 pairs of globally distributed observations from 35 published papers to investigate the response of the soil microbial community to grazing and the underlying mechanisms. Our results showed that light grazing increased the soil bacterial community Shannon index by 2.4%, but the soil fungal Shannon index decreased by 21.4%. Yak (Bos grunniens) grazing significantly increased the soil bacterial and fungal Shannon index by 1.5% and 11.3%, respectively. Grazing duration of 5–10 years increased the soil bacterial Chao1 index by 9.1% and fungal Chao1 and evenness indexes by 11.3% and 30.4%, respectively. In areas with <400 mm of precipitation, grazing decreased the soil bacterial Simpson index, and in areas of ≥400 mm, grazing also reduced the soil bacterial Simpson and increased the fungal richness and evenness. A linear analysis between soil microbial α‐diversity indexes and other related variables showed that soil bacterial and fungal communities α‐diversity and abundance under grazing conditions were significantly and positively correlated with grassland vegetation, soil pH, soil water content (SWC), total nitrogen (TN), total phosphorus (TP), organic carbon (SOC), and nitrate nitrogen (NO3−‐N), suggesting that changes in microbial communities were the combined result of grazing‐induced vegetation and soil changes. Our results revealed the effects of grazing on soil bacterial and fungal α‐diversity and their underlying mechanisms, which provide a basis for advocating moderate grazing and studying grassland management practices.

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Responses of soil bacterial communities to precipitation change in the semi-arid alpine grassland of Northern Tibet

Cited by 8 publications

References 126 publications

Differentiated responses of the phyllosphere bacterial community of the yellowhorn tree to precipitation and temperature regimes across Northern China

Differentiated responses of the phyllosphere bacterial community of the yellowhorn tree to precipitation and temperature regimes across Northern China

Plant property regulates soil bacterial community structure under altered precipitation regimes in a semi-arid desert grassland, China

Response of soil microbial α‐diversity to grazing in grassland ecosystems: A meta‐analysis

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