Grazing promotes soil phosphorus cycling by enhancing soil microbial functional genes for phosphorus transformation in plant rhizosphere in a semi-arid natural grassland

Liu, Jiayue; Li, Frank Y.; Liu, Jiaojiao; Wang, Shuwen; Liu, Huaiqiang; Ding, Yong; Ji, Lei

doi:10.1016/j.geoderma.2022.116303

Cited by 26 publications

(13 citation statements)

References 52 publications

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“…However, our study may change stereotypes about the impact of nutrient changes on nutrient cycling in ecosystems and highlight the need to strengthen further research on interactions between very few important microorganisms. In addition, the abundance of functional genes or enzyme activities in microbial communities varies on environmental gradients, including the gradients of nutrient input quantity or grazing intensity ( Guo et al, 2015 ; Leff et al, 2015 ; Liu et al, 2023 ). However, our study does not involve the effects of different levels of treatments, as microbial communities in bulk soil of the studied ecosystem change little compared to that in rhizosphere ( Liu et al, 2023 ).…”

Section: Discussionmentioning

confidence: 99%

“…In addition, the abundance of functional genes or enzyme activities in microbial communities varies on environmental gradients, including the gradients of nutrient input quantity or grazing intensity ( Guo et al, 2015 ; Leff et al, 2015 ; Liu et al, 2023 ). However, our study does not involve the effects of different levels of treatments, as microbial communities in bulk soil of the studied ecosystem change little compared to that in rhizosphere ( Liu et al, 2023 ). The intensity of the P addition and animal grazing treatment is high in this study, thus the results may mean that neither intense P addition nor grazing cannot lead to a pronounced change in metabolic function.…”

Section: Discussionmentioning

confidence: 99%

“…The grassland was dominated by Stipa grandis , Leymus chinensis , and Cleistogenes squarrosa . For a more detailed description of the studied ecosystem, see Liu et al (2023) .…”

Section: Methodsmentioning

confidence: 99%

“…The grassland was dominated by Stipa grandis, Leymus chinensis, and Cleistogenes squarrosa. For a more detailed description of the studied ecosystem, see Liu et al (2023). The experimental grassland had been a natural steppe grazing land before 2012 when grazing was banned for grassland recovery.…”

Section: Methodsmentioning

confidence: 99%

“…Here, taking the soil samples from a field experiment studying the effects of grazing and P addition on grassland ecosystems, we studied the effects of grazing and P addition on the taxonomic and functional composition of soil microbial communities at species level using the metagenomics. We focused on the soil microbiome of grassland bulk soil, which to some extent disentangled the influence of plant rhizosphere host-related environments on soil microbial communities ( Liu et al, 2023 ).…”

Section: Introductionmentioning

confidence: 99%

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The reciprocal changes in dominant species with complete metabolic functions explain the decoupling phenomenon of microbial taxonomic and functional composition in a grassland

Liu

et al. 2023

Front. Microbiol.

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The decoupling of microbial functional and taxonomic components refers to the phenomenon that a drastic change in microbial taxonomic composition leads to no or only a gentle change in functional composition. Although many studies have identified this phenomenon, the mechanisms underlying it are still unclear. Here we demonstrate, using metagenomics data from a steppe grassland soil under different grazing and phosphorus addition treatments, that there is no “decoupling” in the variation of taxonomic and metabolic functional composition of the microbial community within functional groups at species level. In contrast, the high consistency and complementarity between the abundance and functional gene diversity of two dominant species made metabolic functions unaffected by grazing and phosphorus addition. This complementarity between the two dominant species shapes a bistability pattern that differs from functional redundancy in that only two species cannot form observable redundancy in a large microbial community. In other words, the “monopoly” of metabolic functions by the two most abundant species leads to the disappearance of functional redundancy. Our findings imply that for soil microbial communities, the impact of species identity on metabolic functions is much greater than that of species diversity, and it is more important to monitor the dynamics of key dominant microorganisms for accurately predicting the changes in the metabolic functions of the ecosystems.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…The grassland was dominated by Stipa grandis , Leymus chinensis , and Cleistogenes squarrosa . For a more detailed description of the studied ecosystem, see Liu et al (2023) .…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The reciprocal changes in dominant species with complete metabolic functions explain the decoupling phenomenon of microbial taxonomic and functional composition in a grassland

Liu

et al. 2023

Front. Microbiol.

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Meadow Degradation Affects Microbial Community Structure and Vegetation Characteristics by Increasing Soil pH

Chai,

Yao,

et al. 2024

Land Degrad Dev

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Soil is the natural habitat for microorganisms, providing water and nutrients for vegetation, but the influence of meadow degradation on the “vegetation‐soil‐microorganism” system is still controversial, and the drivers of soil microbial and vegetation characteristics change are still unclear. This study explores in‐depth the vegetation and soil changes in four different degradation levels, that is, non‐degraded (ND), lightly degraded (LD), moderately degraded (MD), and severely degraded (SD), in the northeastern region of the Qinghai‐Tibetan Plateau. Soil metagenomic sequencing methods were employed to understand the soil microbial and functional diversity and the factors that influence them. The findings indicated that alpine meadow degradation decreased the vegetation height, coverage, and above‐ground biomass (AGB), but increased the vegetation diversity index. In addition, meadow degradation reduces soil properties (organic carbon, total nitrogen and phosphorus, available nitrogen and phosphorus) and enzyme activities (sucrase, cellulase, urease, and catalase) but increases soil pH. The copiotrophic groups (Actinobacteria, Ascomycota) decreased while oligotrophic groups (Acidobacteria, Glomeromycota) increased with meadow degradation. In particular, changes in vegetation characteristics and microbial community structure in alpine meadows are strongly influenced by changes in soil pH. In conclusion, the degradation of alpine meadows leads to the growth of some barren‐tolerant species and deviation of soil pH from neutrality, which increases vegetation diversity but surface exposure reduces the vegetation richness, affects the type and amount of root secretions and changes in soil microbial communities, which reduce the fixation and release of soil nutrients. This study provides the theoretical basis for further analyzing the inner mechanism of alpine meadow degradation.

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Crenobacter oryzisoli sp. nov., a novel phosphate-solubilizing bacterium isolated from the paddy soil

Zhang,

Xie,

Yao

et al. 2024

Arch Microbiol

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Grazing promotes soil phosphorus cycling by enhancing soil microbial functional genes for phosphorus transformation in plant rhizosphere in a semi-arid natural grassland

Cited by 26 publications

References 52 publications

The reciprocal changes in dominant species with complete metabolic functions explain the decoupling phenomenon of microbial taxonomic and functional composition in a grassland

The reciprocal changes in dominant species with complete metabolic functions explain the decoupling phenomenon of microbial taxonomic and functional composition in a grassland

Meadow Degradation Affects Microbial Community Structure and Vegetation Characteristics by Increasing Soil pH

Crenobacter oryzisoli sp. nov., a novel phosphate-solubilizing bacterium isolated from the paddy soil

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