Soil aggregate-associated organic carbon mineralization and its driving factors in rhizosphere soil

Soil Biology and Biochemistry, Год журнала: 2023, Номер 186, С. 109182 - 109182

Опубликована: Сен. 19, 2023

Язык: Английский

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Shifts in fungal communities drive soil profile nutrient cycling during grassland restoration

mBio, Год журнала: 2025, Номер unknown

Опубликована: Янв. 24, 2025

ABSTRACT Soil microbial diversity and community life strategies are crucial for nutrient cycling during vegetation restoration. Although the changes in topsoil communities restoration have been extensively studied, structure, strategies, function of subsoil remain poorly understood, especially regarding their role In this study, we conducted a comprehensive investigation soil community, assembly process, functional genes profiles (0–100 cm) across 36 year chronosequence (5, 15, 28, years) fenced grassland one grazing on Loess Plateau China. Our results revealed that organic carbon increased by 76.0% 91.6% after years The bacterial were influenced primarily depth, while fungal highly sensitive to Microbes recovered faster, structure gradually became more consistent following addition, observed transition history from persistent K -strategy rapid r Notably, process played an important genes, which accompanied fixation nitrogen mineralization function. Overall, our findings provide several novel insights into impact profile IMPORTANCE study microbes faster than those topsoil, contributed reduction differences distribution throughout process. Importantly, plays pivotal driving such as mineralization, alongside degradation gene abundance. These alterations increase availability understanding critical facilitate accumulation This insight can guide development manipulating nutrients grasslands.

Язык: Английский

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New perspectives on microbiome and nutrient sequestration in soil aggregates during long‐term grazing exclusion

Global Change Biology, Год журнала: 2023, Номер 30(1)

Опубликована: Ноя. 9, 2023

Abstract Grazing exclusion alters grassland soil aggregation, microbiome composition, and biogeochemical processes. However, the long‐term effects of grazing on microbial communities nutrient dynamics within aggregates remain unclear. We conducted a 36‐year experiment to investigate how affects community associated functions in semiarid grassland. Long‐term (36 years) induced shift communities, especially <2 mm aggregates, from high low diversity compared control. The reduced was accompanied by instability fungal extended distribution pathogens >2 carbon (C) sequestration potential thus revealing negative impact GE. In contrast, 11–26 years greatly increased C promoted cycling functional genes. Moreover, environmental characteristics microhabitats (e.g., pH) altered strongly contributed sequestration. Our findings reveal new evidence microbiology for optimizing duration maintain multiple belowground ecosystem functions, providing promising suggestions climate‐smart resource‐efficient grasslands.

Язык: Английский

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Microbial adaption to stoichiometric imbalances regulated the size of soil mineral-associated organic carbon pool under continuous organic amendments

Geoderma, Год журнала: 2024, Номер 445, С. 116883 - 116883

Опубликована: Апрель 23, 2024

Soil microorganisms play a key role in regulating soil organic carbon (SOC) accrual. Organic amendments with distinct stoichiometry may lead to imbalanced supply of (C), nitrogen (N), and phosphorus (P) the microbiome, causing changes microbial community composition their life strategies, as well enzyme production. However, response these imbalances whether adaptive strategies are related fate SOC pools remain largely unknown low-fertility paddy soil. To address this uncertainty, soils were sampled from 12-year experimental fertilisation trial under integrated application mineral fertilizers three types materials (green manure, rice straw, cattle manure). Stoichiometric between microbes available resources, activities, composition, linkages particulate (POC) mineral-associated (MAOC) C investigated. The results showed that despite equal input, strongest increase MAOC occurred smallest C:N imbalance C:P imbalance, suggesting alleviation N P limitation was inductive accrual stable fraction. Additional lower C: nutrient ratios shifted towards prevalence r-strategists, manure addition supporting copiotrophic bacteria green favouring fungi. Importantly, relative abundances Proteobacteria, Gemmatimonadetes, Actinobacteria belonging copiotrophs negatively but positively POC MAOC, while Chloroflexi, Basidiomycota Glomeromycota oligotrophs exhibited reversed relationships. In addition, greater associated an biomass decrease biomass-specific P-acquiring activity. Random forest analysis partial least squares path model revealed played important indirect shaping by concurrently biomass, production, whereas pool predominantly directly controlled proportion macroaggregates. These provide empirical evidence for stoichiometric control communities feedback pools, highlighting low C:nutrient ratio long-term storage persistence intensively managed soils.

Язык: Английский

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Soil Microbial Carbon Use Efficiency in Natural Terrestrial Ecosystems

Biology, Год журнала: 2025, Номер 14(4), С. 348 - 348

Опубликована: Март 27, 2025

Soil microbial carbon use efficiency (CUE) is the ratio of allocated to growth that taken up by microorganisms. CUE affects terrestrial ecosystem processes such as greenhouse gas emissions, turnover, and sequestration, which an important indicator changes in cycle. Firstly, we summarized three methods soil CUE, stoichiometric modeling, 13C glucose tracing, 18O water compared advantages limitations methods. Then, analyzed single or combined effects different environmental factors on grassland ecosystems, forest wetland ecosystems. Finally, suggested future research should focus following aspects: influence management patterns (such grazing prohibition gap, thinning ecosystems); strategies microorganisms for adapting CUE; anaerobic metabolic pathways, especially ecosystems; taxonomic level. This study contributes investigation mechanisms cycling ecosystems mitigate impacts climate change.

Язык: Английский

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Deciphering microbiomes dozens of meters under our feet and their edaphoclimatic and spatial drivers

Global Change Biology, Год журнала: 2023, Номер 30(1)

Опубликована: Ноя. 13, 2023

Abstract Microbes inhabiting deep soil layers are known to be different from their counterpart in topsoil yet remain under investigation terms of structure, function, and how diversity is shaped. The microbiome soils (>1 m) expected relatively stable highly independent climatic conditions. Much less known, however, on these microbial communities vary along climate gradients. Here, we used amplicon sequencing investigate bacteria, archaea, fungi fifteen 18‐m depth profiles at 20–50‐cm intervals across contrasting aridity conditions semi‐arid forest ecosystems China's Loess Plateau. Our results showed that bacterial fungal α archaeal community similarity declined dramatically remained soil. Nevertheless, still the functional potential N cycling, plant‐derived organic matter degradation, resource exchange, water coordination. had closer taxa–taxa bacteria–fungi associations more influence dispersal limitation than microbiome. Geographic distance was influential bacteria archaea topsoil. We further negatively correlated with deep‐soil richness, similarity, relative abundance plant saprotroph, associations, but increased aerobic ammonia oxidation, manganese arbuscular mycorrhizal soils. Root depth, complexity, volumetric moisture, clay play bridging roles indirect effects microbes work indicates that, even nutrient cycling susceptible changes availability, consequences for understanding sustainability dryland whole‐soil response aridification. Moreover, propose neglecting may underestimate role moisture future scenarios.

Язык: Английский

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Influence of organic matter input and temperature change on soil aggregate-associated respiration and microbial carbon use efficiency in alpine agricultural soils

Soil Ecology Letters, Год журнала: 2024, Номер 6(3)

Опубликована: Янв. 19, 2024

Язык: Английский

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Long-term cultivation reduces soil carbon storage by altering microbial network complexity and metabolism activity in macroaggregates

The Science of The Total Environment, Год журнала: 2024, Номер 930, С. 172788 - 172788

Опубликована: Апрель 25, 2024

Язык: Английский

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Complex vegetation patterns improve soil nutrients and maintain stoichiometric balance of terrace wall aggregates over long periods of vegetation recovery

CATENA, Год журнала: 2023, Номер 227, С. 107141 - 107141

Опубликована: Апрель 6, 2023

Язык: Английский

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Enhancing soil ecological security through phytomanagement of tailings in erosion-prone areas

Journal of Hazardous Materials, Год журнала: 2023, Номер 462, С. 132730 - 132730

Опубликована: Окт. 5, 2023

Язык: Английский

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