Soil microbiomes with distinct assemblies through vertical soil profiles drive the cycling of multiple nutrients in reforested ecosystems

Microbiome, Journal Year: 2018, Volume and Issue: 6(1)

Published: Aug. 21, 2018

Soil microbiomes play an important role in the services and functioning of terrestrial ecosystems. However, little is known their vertical responses to restoration process contributions soil nutrient cycling subsurface profiles. Here, we investigated community assembly bacteria, archaea, fungi along (i.e., depths 0–300 cm) horizontal distance from trees 30–90 profiles a chronosequence reforestation sites that represent over 30 years restoration. In superficial layers (0–80 cm), bacterial fungal diversity decreased, whereas archaeal increased with increasing depth. As proceeded time, spatial variation communities while increased. Vertical distributions were more related properties, may be driven by gradient effect roots extending tree. Bacterial beta-diversity strongly multi-nutrient soil, respectively, playing major roles deep layers. Taken together, these results reveal new perspective on at fine scale single trees. Distinct response patterns underpinned as function during ex-arable land.

Language: Английский

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Spatial scale affects the relative role of stochasticity versus determinism in soil bacterial communities in wheat fields across the North China Plain

Microbiome, Journal Year: 2018, Volume and Issue: 6(1)

Published: Feb. 5, 2018

The relative importance of stochasticity versus determinism in soil bacterial communities is unclear, as are the possible influences that alter balance between these. Here, we investigated influence spatial scale on role and agricultural monocultures consisting only wheat, thereby minimizing differences plant species cover cultivation/disturbance regime, extending across a wide range soils climates North China Plain (NCP). We sampled 243 sites 1092 km sequenced 16S rRNA gene using MiSeq. hypothesized would play relatively stronger at broadest scales, due to strong climate selecting many distinct OTUs bacteria adapted different environments. In order test more general applicability hypothesis, also compared with natural ecosystem Tibetan Plateau. Our results revealed vs. did vary scale, direction predicted. On Plain, played dominant from 150 900 (separation pairs sites) dominated than (broad scale). Plateau, 130 1200 less km. Among identifiable deterministic factors, pH showed strongest community structure diversity Plain. Together, 23.9% variation microbial composition could be explained, environmental factors accounting for 19.7% parameters 4.1%. findings (1) stochastic processes important while Plateau; (2) was major factor shaping Plain; (3) most not explained existing factors. Further studies needed dissect (e.g., mutations or extinctions) distribution, which might make it easier predictably manipulate produce better yield sustainability outcomes.

Language: Английский

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The Roles of Plant Growth Promoting Microbes in Enhancing Plant Tolerance to Acidity and Alkalinity Stresses

Frontiers in Sustainable Food Systems, Journal Year: 2020, Volume and Issue: 4

Published: July 10, 2020

Plant growth often occurs under a range of stressful conditions, including soil acidity and alkalinity. Hydrogen ion concentration, which determines pH the soil, regulates entire chemistry plant nutrient colloidal solutions. Beyond certain levels multiple stresses such as hydrogen toxicity, imbalance, toxicities deficiencies are induced in plants. Breeding for stress coupled with suitable agronomic practices has been way to deal this situation agriculture. However, promoting microbes (PGPM) have shown potential sustainable enhancers help environmental stresses. Considering long-term evolutionary relationships between plants microbes, it is probable that much remains unknown about benefits could be harnessed from PGPM. This article reviews current understanding alkalinity effects on various approaches or address these review further provides detailed account regarding role PGPM management, when breeding combined. Approaches already evaluated limitations because soils gradual progressive conditions. Greater exploitation regard, would interesting explore they more fashion. Future crop production will require tolerance, but also implementation microbial technologies provide enhanced tolerance stress.

Language: Английский

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Rhizosphere-associated bacterial network structure and spatial distribution differ significantly from bulk soil in wheat crop fields

Soil Biology and Biochemistry, Journal Year: 2017, Volume and Issue: 113, P. 275 - 284

Published: June 26, 2017

Language: Английский

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Climate change and human activities altered the diversity and composition of soil microbial community in alpine grasslands of the Qinghai-Tibetan Plateau

The Science of The Total Environment, Journal Year: 2016, Volume and Issue: 562, P. 353 - 363

Published: April 21, 2016

Language: Английский

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Contrasting patterns and drivers of soil bacterial and fungal diversity across a mountain gradient

Environmental Microbiology, Journal Year: 2020, Volume and Issue: 22(8), P. 3287 - 3301

Published: May 21, 2020

Summary Microbial elevational diversity patterns have been extensively studied, but their shaping mechanisms remain to be explored. Here, we examined soil bacterial and fungal community compositions across a 3.4 km gradient (consists of five elevations) on Mt. Kilimanjaro located in East Africa. Bacteria fungi had different this extensive mountain gradient—bacterial U shaped pattern while monotonically decreased. Random forest analysis revealed that pH (12.61% importance) was the most important factor affecting diversity, whereas mean annual temperature (9.84% largest impact which consistent with results obtained from mixed‐effects model. Meanwhile, drivers those differ among taxonomic groups (phyla/classes) within or communities. Taken together, our study demonstrated composition responded differently climate edaphic properties along an gradient, suggests microbial are determined by distinct environmental variables. These findings enhanced understanding formation maintenance elevation, as well responses change montane ecosystems.

Language: Английский

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Fungal community demonstrates stronger dispersal limitation and less network connectivity than bacterial community in sediments along a large river

Environmental Microbiology, Journal Year: 2019, Volume and Issue: 22(3), P. 832 - 849

Published: Aug. 30, 2019

Summary Despite the essential functions of sedimentary bacterial and fungal communities in biogeochemical cycling, little is known about their biogeographic patterns driving processes large rivers. Here we investigated assemblies co‐occurrence Jinsha River, one largest rivers southwestern China. The mainstream river was divided into upstream, midstream downstream. results showed that both differed significantly among three sections. For communities, composition variations all sites or each section were controlled by combination dispersal limitation environmental selection, dominant factor. Compared with bacteria, fungi had stronger limitation. Co‐occurrence network analyses revealed higher connectivity but a lower proportion positive interaction than at sites. In particular, keystone species belonging to phyla Proteobacteria Firmicutes Ascomycota Chytridiomycota may play critical roles maintaining community function. Together, these observations indicate have influence less implying different assembly mechanisms ecological between bacteria

Language: Английский

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Linking Bacterial-Fungal Relationships to Microbial Diversity and Soil Nutrient Cycling

mSystems, Journal Year: 2021, Volume and Issue: 6(2)

Published: March 23, 2021

The relationships between soil biodiversity and ecosystem functions are an important yet poorly understood topic in microbial ecology. This study presents exploratory effort to gain predictive understanding of the factors driving diversity potential nutrient cycling complex terrestrial ecosystems.

Language: Английский

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Coupling Bacterial Community Assembly to Microbial Metabolism across Soil Profiles

mSystems, Journal Year: 2020, Volume and Issue: 5(3)

Published: June 8, 2020

We have provided a framework to better understand the mechanisms governing balance between stochastic and deterministic processes integrate shifts in community assembly with microbial carbon metabolism. Our study reinforced that environmental filtering bacterial cooccurrence patterns influence stochastic/deterministic continuum of soil stochasticity may act through deeper layers Delineating theoretically potential linkages SOC dynamics across broad range systems represents an interesting topic for future research.

Language: Английский

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High microbial diversity stabilizes the responses of soil organic carbon decomposition to warming in the subsoil on the Tibetan Plateau

Global Change Biology, Journal Year: 2021, Volume and Issue: 27(10), P. 2061 - 2075

Published: Feb. 10, 2021

Abstract Soil microbes are directly involved in soil organic carbon (SOC) decomposition, yet the importance of microbial biodiversity regulating temperature sensitivity SOC decomposition remains elusive, particularly alpine regions where climate change is predicted to strongly affect dynamics and ecosystem stability. Here we collected topsoil subsoil samples along an elevational gradient on southeastern Tibetan Plateau explore ( Q 10 ) relation changes communities. Specifically, tested whether would be more sensitive warming when diversity low. The estimated value ranged from 1.28 1.68, 1.80 2.10 subsoil, respectively. highest was observed at lowest altitude forests topsoil, meadow subsoil. Variations were closely related properties. In ratio gram‐positive gram‐negative bacteria (G+:G−) predominant factor associated with altitudinal variations . showed resilience (both whole community major groups) fungi higher. Our results partly support positive biodiversity‐ecosystem stability hypothesis. Structural equation modeling further indicates that composition, which affected by pH. Collectively our provide compelling evidence plays important role stabilizing montane ecosystems. Conservation belowground therefore great maintaining processes under high‐elevation Plateau.

Language: Английский

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