Microbial Carbon Use Efficiency and Growth Rates in Soil: Global Patterns and Drivers

Global Change Biology, Год журнала: 2025, Номер 31(1)

Опубликована: Янв. 1, 2025

ABSTRACT Carbon use efficiency (CUE) of microbial communities in soil quantifies the proportion organic carbon (C) taken up by microorganisms that is allocated to growing biomass as well used for reparation cell components. This C amount subsequently involved turnover, partly leading necromass formation, which can be further stabilized soil. To unravel underlying regulatory factors and spatial patterns CUE on a large scale across biomes (forests, grasslands, croplands), we evaluated 670 individual data obtained three commonly approaches: (i) tracing substrate 13 (or 14 C) incorporation into respired CO 2 (hereafter C‐substrate), (ii) 18 O from water DNA ( O‐water), (iii) stoichiometric modelling based activities enzymes responsible nitrogen (N) cycles. The global mean depends approach: 0.59 C‐substrate approach, 0.34 O‐water approaches. Across biomes, was highest grassland soils, followed cropland forest soils. A power‐law relationship identified between growth rates, indicating faster utilization corresponds reduced losses maintenance associated with mortality. Microbial rate increased content C, total N, phosphorus, fungi/bacteria ratio. Our results contribute understanding linkage rates CUE, thereby offering insights impacts climate change ecosystem disturbances physiology consequences cycling.

Язык: Английский

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A Global Meta‐Analysis of Land Use Change on Soil Mineral‐Associated and Particulate Organic Carbon

Global Change Biology, Год журнала: 2025, Номер 31(3)

Опубликована: Март 1, 2025

ABSTRACT Separating soil organic carbon (SOC) into mineral‐associated (MAOC) and particulate (POC) enables accurate prediction of SOC vulnerability to land use change (LUC). Here, we synthesize the responses MAOC POC LUC, including restoration degradation, from 693 observations globally. We observed a large increase in after greater decline but magnitude proportion these two fractions (fMAOC fPOC) varied with LUC. POC, comparison MAOC, responded more sensitively suggesting that was vulnerable environmental change. Using duration relationships, found fraction (fPOC) higher at early stage lower late stage, projecting stability declined short‐term gradually increased long‐term restoration. Further analysis showed context‐dependent effects LUC on fractions: arid or carbon‐poor topsoil, greatly fPOC, while humid carbon‐rich degradation resulted decreases especially POC. Overall, highlight importance fractions, particularly predicting suggest incorporating climate initial status models dynamics helps accurately predict future sink potential.

Язык: Английский

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Soil respiration and its temperature sensitivity in Pinus koraiensis plantations are mediated by temperature, humidity, and wind speed

Trees Forests and People, Год журнала: 2025, Номер unknown, С. 100784 - 100784

Опубликована: Янв. 1, 2025

Язык: Английский

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Dual Effects of Vegetation Restoration Patterns and Soil Depth on the Soil Microbial Residue Carbon Accumulation in a Red Soil Erosion Area of Southern China

Land Degradation and Development, Год журнала: 2025, Номер unknown

Опубликована: Фев. 13, 2025

ABSTRACT Microbial residue carbon (MRC) is an important source of soil organic (SOC) and plays a vital role in the accumulation retention SOC. Vegetation restoration effective strategy for restoring degraded lands. However, there are no studies on how MRC profile changes with vegetation restoration. We evaluated (using amino sugars) its contribution to SOC at different depths (0–20, 20–50, 50–100 cm) during severely eroded forest (CK), restored (ecological management), orchard (development management pattern), secondary (ideal control). biomarkers were extracted from profiles used measure microbial diversity community composition 16S rRNA). restoration, depth, their interaction each other significantly affected MRC, fungal (FRC), bacterial (BRC) contents. The content tended increase across four patterns following order: CK (323.25 mg kg −1 ) < (1035.67 (2919.01 (6556.72 ). Furthermore, increased increasing depth forest. contributions total varied 13.12% 71.88%. rapid was substantially influenced by content, nitrogen pH, diversity, phyla. In conclusion, play roles red erosion areas. These findings pivotal improving our mechanistic understanding regulation preservation ecosystem.

Язык: Английский

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Responses and microbial mechanisms of greenhouse gas emissions and multifunctionality of soils at different elevations in Changbai Mountain under warming conditions

Applied Soil Ecology, Год журнала: 2025, Номер 208, С. 105972 - 105972

Опубликована: Март 1, 2025

Язык: Английский

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Enhancing nitrogen fertilizer productivity in cotton fields in southern Xinjiang by improving the soil microenvironment through water and nitrogen management

Agricultural Water Management, Год журнала: 2025, Номер 312, С. 109442 - 109442

Опубликована: Март 23, 2025

Язык: Английский

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The impact of soil viruses on C emissions can be enhanced by viral shuttle processes in soils

Pedosphere, Год журнала: 2025, Номер unknown

Опубликована: Март 1, 2025

Язык: Английский

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Long‐term ammonium nitrate addition strengthens soil microbial cross‐trophic interactions in a Tibetan alpine steppe

Ecology, Год журнала: 2025, Номер 106(3)

Опубликована: Март 1, 2025

Global nitrogen (N) enrichment is modifying microbial interactions, which can be represented by network complexity. While a number of studies have explored how N addition influences the intra-trophic network, its effects on inter-trophic rarely been investigated. Here, we examined 8 years multilevel additions (i.e., 0, 1, 2, 4, 8, 16, 24 and 32 g m-2 year-1) interactions soil communities protist-fungi, protist-prokaryote fungi-prokaryote) in Tibetan alpine steppe. Generally, there was first increasing then saturated trend complexity networks along N-addition gradient, contrasts with simplified or minimal response reported previously. The intensified cross-trophic were mainly explained increased plant litter biomass, indicates that N-induced increases carbon supplies may alleviated energy limitations thus resulted more active metabolic processes, consequently stimulating various biotic (e.g., predation, competition, commensalism). Further, enhanced relationships found to associated mineralization processes. Overall, these findings highlight importance indicate they should considered predictions ecosystem functioning under global enrichment.

Язык: Английский

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Comparative Carbon Allocation and Soil Carbon Storage in Three Revegetated Shrublands in the Mu Us Desert

Forests, Год журнала: 2025, Номер 16(4), С. 586 - 586

Опубликована: Март 27, 2025

Revegetation in arid and semi-arid regions is a pivotal strategy for mitigating desertification controlling soil erosion by enhancing carbon storage woody biomass wind-induced erosion. Despite its recognized importance, critical gap remains understanding how distributed across different plant compartments (leaves, stems, litter, roots) this distribution influences dynamics. In study, we examined allocation between aboveground (shoot litterfall) belowground (coarse fine components, as well the composition vertical of three 20-year-old shrub plantations—Salix psammophila, Corethrodendron fruticosum, Artemisia desertorum—in northwest China. Total litter were highest S. psammophila plantation (3689.29 g m−2), followed C. fruticosum (1462.83 m−2) A. desertorum (761.61 m−2). contrast, at 1 m depth was greatest (12,831.18 (7349.24 (5375.80 Notably, also exhibited proportions stable organic (heavy-fraction) inorganic carbon, while had lowest. Across all plantations, light-fraction displayed distinct distributions, heavy-fraction did not show significant spatial patterns. A strong correlation found fractions microbial nitrogen, suggesting that communities key drivers stabilization turnover. These findings underscore importance composition, root traits, activity determining accumulation following revegetation. The study highlights need to investigate species-specific mechanisms, such rhizodeposition dynamics necromass stabilization, elucidate redistribution pathways ecosystems.

Язык: Английский

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Effects of polyethylene microplastics on soil microbial assembly and ecosystem multifunctionality in the remote mountain: Altitude matters

Journal of Hazardous Materials, Год журнала: 2025, Номер 493, С. 138327 - 138327

Опубликована: Апрель 17, 2025

Язык: Английский

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