Increasing phosphorus availability reduces priming effect by facilitating microbial carbon use efficiency in a subtropical forest soil

Biology and Fertility of Soils, Journal Year: 2025, Volume and Issue: unknown

Published: March 21, 2025

Language: Английский

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Microbially‐Mediated Soil Carbon‐Nitrogen Dynamics in Response to Future Soil Moisture Change

Earth s Future, Journal Year: 2025, Volume and Issue: 13(3)

Published: March 1, 2025

Abstract The interactions between soil carbon and nitrogen (C‐N) processes with environmental factors, particularly moisture, are critical to maintaining ecosystem functions. However, the lagged effects of future change in moisture on C‐N dynamics remain poorly understood. Here, we employed Microbial‐ENzyme Decomposition model simulate long‐term impacts variation using standardized index (SSI) across four Shared Socioeconomic Pathways (SSPs). Our results demonstrated that exhibited both cumulative responses fluctuations over extended periods. Active microbes were closely associated short‐term (3‐month) whereas organic C (SOC) total N (TN) stronger correlations periods (72 months). Under SSP5‐8.5 scenario, SOC TN decreased wet conditions but increased during droughts, increases 28.9% 13.1%, respectively, under extreme drought conditions. We found active microbial biomass was significantly more sensitive than biomass, especially Furthermore, enzymes key drivers transformations, displaying highest correlation SSI (nonlinear coefficient based mutual information = 0.81). This study establishes a foundational relationship variables accounting for lag effects, enhance our understanding complex these climate scenarios.

Language: Английский

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Phosphorus Cycling Dominates Microbial Regulation of Synergistic Carbon, Nitrogen, and Phosphorus Gene Dynamics During Robinia pseudoacacia Restoration on the Loess Plateau

Agronomy, Journal Year: 2025, Volume and Issue: 15(4), P. 797 - 797

Published: March 24, 2025

Carbon (C), nitrogen (N), and phosphorus (P) are key soil nutrients whose synergistic interactions regulate ecosystem nutrient cycling, yet the functional gene-level coordination driving factors of these cycles remain poorly understood. This study addresses this gap by investigating dynamic changes in C, N, P cycling genes their microbial environmental drivers across Robinia pseudoacacia plantations different restoration stages (10, 20, 30, 40 years) on Loess Plateau. We analyzed physicochemical properties conducted metagenomic sequencing, redundancy analysis (RDA), Partial Least Squares Structural Equation Modeling (PLS-SEM). Results showed that P-cycling genes, particularly pqqC spoT, exhibited highest network centrality, indicating dominant role regulating dynamics. Compared with farmland, STC, SOC, SAP, pH, SWC significantly changed (p < 0.05) age, directly shaping groups such as Proteobacteria, Acidobacteria, Actinobacteria, Chloroflexi. These shifts were strongly correlated gene abundance 0.01). The findings highlight central phosphorus-solubilizing linking emphasize community responses to a driver during ecological restoration. provides novel insights into significance dynamics, offering theoretical support for improving strategies

Language: Английский

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Contrasting Exogenous and Endogenous Soil Microbial Carbon Use Efficiencies Under Global Changes

Global Ecology and Biogeography, Journal Year: 2025, Volume and Issue: 34(4)

Published: March 31, 2025

ABSTRACT Aim Microbial carbon use efficiency ( CUE ) is one of the key indicators for formation and release soil carbon. can be divided into exogenous ex , in using external sources measured by e.g. 13 C or 14 labeling) endogenous en internal 18 O labeling). Global changes strongly influence CUE, which response depends on source. However, effect size drivers responses to global remain unclear, leading large uncertainties when forecasting terrestrial cycling. We aimed quantify magnitude direction microbial changes. Location Global. Time Period 2011–2024. Major Taxa Studied Soil microorganisms. Methods Database containing 213 paired 155 data was integrated meta‐analysed assess impacts change factors CUE. Additional information gathered encompassed latitude, longitude, climate, plant properties, properties experimental conditions. Results found that decreased with absolute while showed opposite trend. Warming reduced 3.6% 16.5%, respectively. Drought increased 7.9%, but 14.3%. Nutrient inputs consistently 5.0%–17.1%, nitrogen combined phosphorus potassium 25.5% 43.1%, Aridity index, pH cation exchange capacity were main influencing . In contrast, respiration growth rates, followed biomass, major predictors Main Conclusions Biogeochemical models should account spatial patterns as well their respective specific under changes, accurately predict various sources.

Language: Английский

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Long-term NPK fertilization enhances microbial carbon use efficiency in Andosols by alleviating P limitation and shifting microbial strategies

Environmental Research, Journal Year: 2025, Volume and Issue: unknown, P. 121598 - 121598

Published: April 1, 2025

Language: Английский

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Sustainable Land Use Enhances Soil Microbial Respiration Responses to Experimental Heat Stress

Global Change Biology, Journal Year: 2025, Volume and Issue: 31(4)

Published: April 1, 2025

ABSTRACT Soil microbial communities provide numerous ecosystem functions, such as nutrient cycling, decomposition, and carbon storage. However, global change, including land‐use climate changes, affects soil activity. As extreme weather events (e.g., heatwaves) tend to increase in magnitude frequency, we investigated the effects of heat stress on activity respiration) that had experienced four different long‐term intensity treatments (ranging from extensive grassland intensive organic conventional croplands) two conditions (ambient vs. predicted future climate). We hypothesized both land use would reduce respiration (H1) experimental (H2). this be less pronounced soils with a history high‐intensity (H3), higher fungal‐to‐bacterial ratio show more moderate response warming (H4). Our study showed was reduced under high (i.e., −43% between cropland) (−12% comparison ambient Moreover, increased overall (+17% per 1°C increase), while increasing strength (−25% slope reduction). In addition, biomass low‐intensity grassland) enhanced stress. These findings change may compromise well their heatwaves. particular, are able respond additional stress, heatwaves, potentially threatening critical functions driven by microbes highlighting benefits sustainable agricultural practices.

Language: Английский

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Rethinking microbial carbon use efficiency in soil models

Nature Climate Change, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 19, 2024

Language: Английский

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Soil particulate organic carbon regulates microbial carbon use efficiency in subtropical forests under nitrogen addition in different seasons

Applied Soil Ecology, Journal Year: 2024, Volume and Issue: 203, P. 105680 - 105680

Published: Oct. 7, 2024

Language: Английский

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