Quantifying the immediate response of the soil microbial community to different grazing intensities on irrigated pastures

Syoc, Emily Van; Albeke, Shannon E.; Scasta, John Derek; Diepen, Linda T. A. van

doi:10.1016/j.agee.2021.107805

Cited by 17 publications

(9 citation statements)

References 75 publications

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“…A large body of field experiments and meta-analyses have been carried out to measure the influences of grazing on the soil’s physical environment, available elements, and element limitations ( Zhang et al, 2018a ; Chai et al, 2019 ; Fenetahun et al, 2021 ; Liu et al, 2022 ; Van Syoc et al, 2022 ; Wang L. et al, 2022 ). Grazing could decrease soil porosity ( Tang et al, 2019 ) and increase soil bulk density ( Binkley et al, 2003 ; Davidson et al, 2017 ; Zhang et al, 2018b ; Sun et al, 2019 ; Lai and Kumar, 2020 ; Fenetahun et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Grazing lowers soil multifunctionality but boosts soil microbial network complexity and stability in a subtropical grassland of China

Ding

Tian

et al. 2023

Front. Microbiol.

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IntroductionLong-term grazing profoundly affects grassland ecosystems, whereas how the soil microbiome and multiple soil ecosystem functions alter in response to two-decades of grazing, especially how soil microbiome (diversity, composition, network complexity, and stability) forms soil multifunctionality is rarely addressed.MethodsWe used a long-term buffalo grazing grassland to measure the responses of soil physicochemical attributes, stoichiometry, enzyme activities, soil microbial niche width, structure, functions, and networks to grazing in a subtropical grassland of Guizhou Plateau, China.ResultsThe evidence from this work suggested that grazing elevated the soil hardness, available calcium content, and available magnesium content by 6.5, 1.9, and 1.9 times (p = 0.00015–0.0160) and acid phosphatase activity, bulk density, pH by 59, 8, and 0.5 unit (p = 0.0014–0.0370), but decreased the soil water content, available phosphorus content, and multifunctionality by 47, 73, and 9–21% (p = 0.0250–0.0460), respectively. Grazing intensified the soil microbial carbon limitation (+78%, p = 0.0260) as indicated by the increased investment in the soil β-glucosidase activity (+90%, p = 0.0120). Grazing enhanced the complexity and stability of the bacterial and fungal networks but reduced the bacterial Simpson diversity (p < 0.05). The bacterial diversity, network complexity, and stability had positive effects, while bacterial and fungal compositions had negative effects on multifunctionality.DiscussionsThis work is an original attempt to show that grazing lowered multifunctionality via the reduced bacterial diversity and shifted soil bacterial and fungal compositions rather than the enhanced bacterial and fungal network complexities and stability by grazing. Protecting the bacterial diversity from decreasing, optimizing the composition of bacteria and fungi, and enhancing the complexity and stability of bacterial network may be conducive to improving the soil multifunction of grazing grassland, on a subtropical grassland.

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Section: Introductionmentioning

confidence: 99%

Grazing lowers soil multifunctionality but boosts soil microbial network complexity and stability in a subtropical grassland of China

Ding

Tian

et al. 2023

Front. Microbiol.

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“…Several studies indicate that microbial communities associated with plants have been discovered to be advantageous for plant growth and resistance against biotic and abiotic stresses (Zhang et al;Van Syoc et al, 2022). Therefore, understanding the spatial pattern and temporal evolution of the root-associated microbiota is essential for agroecosystem function (Edwards et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Soil bacterial communities of paddy are dependent on root compartment niches but independent of growth stages from Mollisols of Northeast China

Liu

Wang²,

Sun³

et al. 2023

Preprint

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The spatial distribution of bacteria in bulk soil has been well studied. Deep insights into adhering soil of root zones (rhizosphere and rhizoplane) microbial community could provide a better understanding of the plant-microbe relationship. In order to better understand the dynamics of these microbial assemblies over the plant life cycle in rhizodeposition along rice roots. Here, we investigated bacterial distribution in bulk, rhizosphere and rhizoplane soils at tillering, heading and mature stage, from rice (Oryza sativa) fields of the Northeast China. Our results revealed that soil bacterial α-diversity and community composition were significantly affected by root compartment niches but not by temporal change. Deterministic processes dominated the assemblage of bacterial communities in three soil compartments. Network analysis indicated that the bacterial networks in bulk soils were more complex than rhizosphere and rhizoplane soils, reflected by more nodes and stronger connections, which was mainly driven by ecological niches. We also detected shifts from bulk to rhizoplane soils in some functional guilds of bacteria, which changed from sulfur and nitrogen utilization to more carbon and iron cycling processes. Taken together, our results suggest distinct bacterial network structure and distribution patterns among rhizosphere, rhizoplane and bulk soils, which could possibly result in potential functional differentiation.

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“…Several studies indicate that microbial communities associated with plants have been discovered to be advantageous for plant growth and resistance against biotic and abiotic stresses (Van Syoc et al, 2022;Zhang et al, 2022). Therefore, understanding the spatial pattern and temporal evolution of the root-associated microbiota is essential for agroecosystem function (Edwards et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Soil bacterial communities of paddy are dependent on root compartment niches but independent of growth stages from Mollisols of Northeast China

Liu

Wang²,

Sun

et al. 2023

Front. Microbiol.

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IntroductionDeep insights into adhering soil of root zones (rhizosphere and rhizoplane) microbial community could provide a better understanding of the plant-microbe relationship. To better understand the dynamics of these microbial assemblies over the plant life cycle in rhizodeposition along rice roots.MethodsHere, we investigated bacterial distribution in bulk, rhizosphere, and rhizoplane soils at tillering, heading, and mature stage, from rice (Oryza sativa) fields of the Northeast China.Results and DiscussionOur results revealed that soil bacterial α-diversity and community composition were significantly affected by root compartment niches but not by temporal change. Compared to rhizoplane soils in the same period, bulk in the heading and rhizosphere in the mature had the largest increase in Shannon’s index, with 11.02 and 14.49% increases, respectively. Proteobacteria, Chloroflexi, Bacteroidetes, and Acidobacteria are predominant across all soil samples, bulk soil had more phyla increased across the growing season than that of root related-compartments. Deterministic mechanisms had a stronger impact on the bacterial community in the compartments connected to the roots, with the relative importance of the bulk soil, rhizoplane and rhizosphere at 83, 100, and 56%, respectively. Because of ecological niche drivers, the bacterial networks in bulk soils exhibit more complex networks than rhizosphere and rhizoplane soils, reflected by more nodes, edges, and connections. More module hub and connector were observed in bulk (6) and rhizoplane (5) networks than in rhizosphere (2). We also detected shifts from bulk to rhizoplane soils in some functional guilds of bacteria, which changed from sulfur and nitrogen utilization to more carbon and iron cycling processes. Taken together, our results suggest distinct bacterial network structure and distribution patterns among rhizosphere, rhizoplane, and bulk soils, which could possibly result in potential functional differentiation. And the potential functional differentiation may be influenced by plant root secretions, which still needs to be further explored.

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Quantifying the immediate response of the soil microbial community to different grazing intensities on irrigated pastures

Cited by 17 publications

References 75 publications

Grazing lowers soil multifunctionality but boosts soil microbial network complexity and stability in a subtropical grassland of China

Grazing lowers soil multifunctionality but boosts soil microbial network complexity and stability in a subtropical grassland of China

Soil bacterial communities of paddy are dependent on root compartment niches but independent of growth stages from Mollisols of Northeast China

Soil bacterial communities of paddy are dependent on root compartment niches but independent of growth stages from Mollisols of Northeast China

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